DTC P1643 Engine Speed Output Circuit Remember this if you review the stored information in Capture Info. DTC P1641 Malfunction Indicator Lamp (MIL) Control Circuit cruise, brake. P1406 EGR Valve Pintle Position Circuit P1407 EGR Air Intrusion in Exhaust Supply to EGR Valve P1460 Cooling Fan Control System P1460 Misfire Detected With Low Fuel Level Increase the engine speed to 3000RPM, if possible. DTC P1501 Theft Deterrent System P1350 Ignition Control System P1143 HO2S Bank 1 Sensor 3 Lean System or Low Voltage If so clean the throttle body bore and the throttle valve plate using a toothbrush and approved throttle body cleaner then retry. DTC P1628 ECT Pull-Up Resistor Still goes reduced engine power under load, climbing a steep hill etc. Lets just say that the outcome of this months Diagnostic Dilemma has turned out to be another of the Great Mysteries of the Universe. The TAC module continuously test the integrity of this data. Cannot seem to find a common connection as to when or why I can it expect it. P1584 Cruise Control Disabled P1585 Cruise Control Inhibit Output Circuit any help would be appreciated. of serial data requires not only good circuit integrity but also adequate system voltage. Refer to. - The April Digital Edition Is Available Today, The February Digital Edition Is Free To Download, Read, The January Digital Edition Is Available To Download, Read, Alternator Testing For No Charge Conditions. P1158 HO2S Bank 2 Sensor 2 Rich or High Voltage if no failures are reported by this or any other emission related diagnostic. What could be the problem? Hello, I have a big problem. DTC P1533 A/C Evaporator Temp. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. It is a common failure, but the vehicle has over 78,000 on it. DTC P1543 A/C System Performance DTC P1654 Cruise Control Inhibit Output Circuit The Yukon, which is owned by a neighboring public school district, failed to start in November 2014. DTC P1560 Transaxle Not in Drive - Cruise Control Disabled It https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing, https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump, https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator. P1823 Internal Mode Switch Circuit P Low Thanks, I Am Only Able To Drive 20-30 Mph. It may be necessary to preform clear codes function twice to clear this DTC. P1586 Cruise Control Brake Switch 2 Circuit P1608 Serial Communication Problem With Device 8 P1583 Cruise Direction CircuitHigh Voltage Does it fell like the code states," It's Lost Power?". I have not gotten the PCM updates from the dealer yet. P1274 Injectors Wired Incorrectly P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit DTC P1578 BBV Sensor Ckt. DTC P1568 Cruise Servo Stroke Greater than Commanded in Cruise Go to DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent var url = 'obd\u002Dcodes.com'; Refer to Inspect related circuits for being shorted to a B+ supply circuit. Note: See this page for generic OBD-II codes (they start with P0XXX). DTC P1541 A/C High Side Over Temperature She Was Driving And As She Was Accelerating The Car Just Stopped. P1564 Vehicle Acceleration Too High - Cruise Control Disabled This should fix your problem. P1278 Accelerator Pedal Position Sensor 1 Circuit High Voltage I love this site. On It sounds like a bad fan clutch on the engine. DTC P1666 Driver 3 Line 6 P1820 Internal Mode Switch Circuit A Low Ill also mention that ECM ground G103 actually broke in two while I was wiggle-testing it. Schematic Reference: This serial data circuit is separate from any other serial data circuit on the vehicle. Sens. P1632 Theft Deterrent Fuel Disable Signal Received Does the scan tool indicate this DTC failed this ignition? I do not believe it is the transmission because it shifts fine when your easy on the gas. Intermittent High VoltageP1116 ECT Signal Unstable or Intermittent P1140 HO2S Transition Time Ratio Bank 1 Sensor 2 P1875 4WD Low Switch Circuit Electrical P1884 TCC Enable/Shift Light Circuit P1886 Shift Timing Solenoid P1887 TCC Release Switch Circuit P1890 ECM Data Input Circuit P1890 Throttle Position Signal Input P1891 Throttle Position Sensor PWM Signal Low For a better experience, please enable JavaScript in your browser before proceeding. DTC P1624 Customer Snapshot Requested - Data Available Module programming error Aftermarket performance products Damaged PCM IMRC monitor signal circuit shorted to PWR GND or SIG RTN Damaged IMRC actuator or solenoid Blocked vacuum hoses TAC motor wire shorted together TAC motor circuit wires short to PWR Damaged electronic throttle body (ETB) Damaged PCM Open Questions: P1569 Cruise Servo Stroke High While not in Cruise DTC P1581 Cruise Move Circuit High Voltage '"TITLE="Contact\u0020Us" role="menuitem">' + icon + DTC P1653 Oil Level Lamp Control Circuit P1243 Injector Circuit Cylinder 8 Intermittent I believe this model uses an Accelerator Pedal Position Sensor Assy. P1114 Engine Coolant Temperature (ECT) Sensor Circuit DTC P1502 Theft Deterrent Fuel Enable Signal Not Received. The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. DTC P1610 Loss of PZM Serial Data P1336 Crankshaft Position (CKP) System Variation Not Learned DTC P1587 Cruise Control Clutch Control Circuit Low DTC P1660 Cooling Fan Control Circuits P1519 Citroen Electronic . have also checked throttle body truck has new engine and new sensors. Disconnect the 16-way TAC module harness connector. Low Voltage P1578 BBV Sensor Ckt. Long story short, and despite the codes being cleared and B- being disconnected, P1518 had vanished and the TAC was going into limp mode each time the ignition was turned on. and DTC P1635 5 Volt Reference Circuit P1121 Throttle Position (TP) Sensor Circuit Intermittent High Now, if the 8.1L has this problem it stats its because of an electronic throttle control system fault, which even sounds similar to your situation. DTC P1503 Theft Deterrent Fuel Enable Signal Not Correct. Complaint: An intermittent no-crank/no-start condition along with an intermittent malfunction indicator lamp and service message(s) being displayed. . P1357 IC Output High/Pulse Detected when GND_Cyl. P1535 A/C High Side Temperature Sensor Circuit DTC P1570 Traction Control Active - Cruise Control Disabled A DTC P1518 was stored in the history codes, which my clients shop diagnosed as a bad ignition switch. P1517 Electronic Throttle Module P1518 Electronic Throttle Module to PCM Communication P1519 Throttle Actuator Control (TAC) Module Internal Circuit . P1864 Torque Converter Clutch Circuit P1868 Transmission Fluid Life P1870 Transmission Component Slipping P1871 Undefined Gear Ratio P1873 TCC Stator Temp. Yes, engine power was indeed reduced. The TAC module stays powered-up when the ignition switch is turned OFF. Engine Controls Connector End Views 1) Never trust a voltage drop reading on a circuit that grounds more than one actuator or module because the voltage drop depends very much on peak amperage. P1543 A/C System Performance P1544 A/C Refrigerant Condition Very Low sets. H02S P0030 Heater Control Circuit Bank 1 Sensor 1, H02S P0036 Heater Control Circuit Bank 1 Sensor 2, P0201 Injector Circuit 1 open cylinder 1, P0202 Injector Circuit 2 open cylinder 2, P0203 Injector Circuit 3 open cylinder 3, P0204 Injector Circuit 4 open cylinder 4, P0205 Injector Circuit 5 open cylinder 5, P0206 Injector Circuit 6 open . Test both serial data circuits at the TAC module 16-way connector for a short to ground with a DMM. DTC P1607 Serial Communication Problem With Device 7 We also applied Stabilant-22 to enhance the electrical conductivity of the Throttle Activation Control (TAC) module and throttle body connector pins. P1570 Traction Control Active - Cruise Control Disabled P1633 Ignition 0 Switch Circuit P1634 Ignition 1 Switch Circuit P1635 5 Volt Reference Circuit P1636 PCM Stack Overrun P1637 Generator L-Terminal Circuit P1638 Generator F-Terminal Circuit P1639 5 Volt Reference 2 Circuit P1640 Driver-1-Input High Voltage P1641 Malfunction Indicator Lamp (MIL) Control Circuit The measurement of voltage is like the speed of the traffic. It attaches under the lip of the resonator box in a grommet. after 3consecutive ignition cycles that the diagnostic runs and does Fuel) Gas Mass Sensor Circuit Range/Performance Ckt. It has stalled out once or twice but it turns right back on. Signal Out-Of-Range Low A history DTC clears after 40consecutive warm-up cycles, If you click them and P1281 Accelerator Pedal Position Sensor 2 Circuit Performance to Amazon, eBay and other sites may include affiliate code. P1397 Wheel Speed Sensor 2 - G - Sensor Circuit Low Voltage P1546 A/C Clutch Status Circuit Low Voltage There are other codes that would show up if the ECM or throttle module themselves were bad. Does the DMM indicate continuity to ground? P1480 Cooling Fan 1 Control Circuit High I am not sure if I make sense but I would gladly send pictures. P1108 BARO to MAP Sensor Comparison Too High P1211 Mass Air Flow Circuit Intermittent High P1155 HO2S Lean Mean Bank 2 Sensor 1 P1156 HO2S Rich Mean Bank 2 Sensor 1 P1157 HO2S Bank 2 Sensor 2 Lean System or Low Voltage Refer to An improperly torqued TAC module ground may be at fault. DTC P1501 Theft Deterrent System. Wiring Repairs DTC P1561 Cruise Vent Solenoid And, we also know that accessory load across a fixed resistance can be a major variable. On the positive side, the long-standing P1518 DTC had not set since the ECM had been replaced. DTC P1500 Starter Signal Circuit. P1228 Injector Circuit Cylinder 3 Intermittent I did not clear the code, but when I went to restart the truck again, no CEL, no messages, and no reduced power - drove it 1/4 mile down the road, and it ran fine. DTC P1693 Tachometer Circuit Low Voltage Refer to As described in the July 2015 issue of Underhood Service (The 1,300-Mile Test Drive), a seemingly routine loss of power and a no-cranking, no-instrument cluster, no-scan-tool communication complaint on a 2003 GMC Yukon, VIN Z 5.3-liter flex fuel engine turned out to be a major Diagnostic Dilemma. DTC P1615 Loss of VTD Serial Data P1515 Electronic Throttle System Throttle Position that were indicative of a bad ground. P1630 Theft Deterrent Learn Mode Active P1631 Theft Deterrent Start Enable Signal Not Correct Observe the Capture Info with a scan tool. P1403 Exhaust Gas Recirculation System Valve 1 Or it could be the idle air control valve, if most of the trouble is at idle and take off. P1565 Cruise Servo Position Sensor P1566 Engine RPM Too High - Cruise Control Disabled Once the PCM finally comes online and communicates with the TAC module, it logs the P1518 and displays reduced power. P1523 Throttle Closed Position Performance Engine Controls Schematics, Connector End View Reference: * P1418 Secondary Air Injection System Relay A Control Circuit High * P1420 Intake Air Low Pressure Switch Circuit Low Voltage * P1421 Intake Air Low Pressure Switch Circuit High Voltage * P1423 Intake Air High Pressure Switch Circuit High Voltage * P1431 Fuel Level Sensor 2 Circuit Performance * P1432 Fuel Level Sensor 2 Circuit Low Voltage to the TAC module ground circuit. DTC P1631 Theft Deterrent Start Enable Signal Not Correct Refer to. Are there any DTCs that have not been diagnosed? DTC P1670 Driver 4 Switching Bank 1 Sensor 2 P1831 PC Solenoid Power Circuit - Low Voltage All content 2004-2023 OBD-Codes.com. DTC P1620 Low Coolant Circuit DTC P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) DTC P1638 Generator F-Terminal Circuit Low voltage can cause this DTC to set. P1359 Ignition Coil Group 1 Control Circuit P1660 Cooling Fan Control Circuits P1661 MIL Control Circuit P1662 Cruise Lamp Control Circuit P1663 Oil Life Lamp Control Circuit P1664 1-4 Upshift Lamp Control Circuit P1665 Driver 3 Line 5P1666 Driver 3 Line 6P1667 Reverse Inhibit Solenoid Control Circuit Please help me if you can with my problem and help me avoid being taken advantage of again I am on a very tight budget and I miss driving my car. P1356 IC Output High/Pulse Detected when GND_Cyl. Wiring Repairs The car will not start now. P1791 Transmission Control Module Loop P1792 Transmission Control Module Reprogrammable Memory 5 I have switched my oscilloscope channels to the 2 switched inputs, the 12v fuel pump relay output, and the 5v VREF output. DTC P1520 Transmission Range Switch Circuit The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1795 CAN Bus - Throttle Body Position P1800 TCM Power Relay Control Circuit P1801 Performance Selector Switch Failure P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. Fuel Economy, Hybrids & Electric, Car Repairs, Recalls And More. P1518 PCM & TAC module communication detected missing or invalid serial data. P1792 ECM to TCM Engine Coolant Signal P1793 Transmission Control Module Stack Overrun DTC P1537 A/C Request Circuit Low Voltage The vehicle blows black smoke and leaks water from exhaust. ", if this is the correct display, you need to check any/all of the cooling system features and components. Servicing GM Autoride Rear Air Suspension. DTC P1625 TCM System Reset P1483 Engine Cooling System Performance P1500 Starter Signal Circuit P1501 Theft Deterrent System P1501 Vehicle Speed Sensor Circuit Intermittent Switch Circuit High var icon = '' Inspect the fuses for the circuits that are in the TAC module harness-i.E. Code P1518 GMC Possible Causes Dead or weak battery Faulty Throttle Actuator Control (TAC) module Throttle Actuator Control (TAC) module harness is ope or shorted Throttle Actuator Control (TAC) module circuit poor electrical connection Check Throttle Actuator Control (TAC) module connector for water DTC P1672 Low Engine Oil Level Lamp Control Circuit You must log in or register to reply here. DTC P1690 ECM Loop Overrun Clear editor. P1365 IC Cylinder 5 Not Toggling After Enable Dont limit yourself to just checking emissions controls use your smoke machine to check numerous vehicle systems. The vehicle blows black smoke and leaks water from exhaust. Both of these potential culprits could be easily attributable to the engine recently being swapped. At 167,000 miles on the odometer and with no other symptoms, the shop (and rightly so, in my experience) installed a new ignition switch. P1647 Driver 1 Line 7P1650 Control Module Output B Circuit P1651 Fan 1 Relay Control Circuit P1652 Powertrain Induced Chassis Pitch Output Circuit DTC P1542 A/C System High Pressure High Temperature Accurate transmitting and receiving of serial data requires not only good circuit integrity . DTC P1676 Driver 4 Line 6 DTC P1576 BBV Sensor Ckt. But, making more power with less displacement puts more stress on the engine. Test each serial data circuit between the TAC module 16-way harness connector and the PCM harness connector for an open or high resistance with a DMM. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). The battery negative-to-block ground G105 not only grounds the starter and alternator, it must also ground G103 and G104, which makes it the most critical and most load-sensitive ground on the whole vehicle. P1602 Knock Sensor (KS) Module Performance First, it is a good thing that the check engine light came on. This serial data circuit is separate from any other serial data circuit on the vehicle. . PerformanceP1405 Exhaust Gas Recirculation System Valve 3 I got a pump for $210.00 on Amazon and it took a day but I got it done runs great! The vehicle warranty is only good to 36,000. I am not sure what the problem is. The title of the updated engine diagnostic calibration in TIS2000 is "New calibration to eliminate setting of P0120, P0220, or P1516 with the engine not running. P0000-P0900 P1000-P1500 . I bought it two months ago used from a dealer. The computer system that controls your car has a built in safety feature called P1364 IC Cylinder 4 Not Toggling After Enable are high, B+. Plugged the scanner in and got a P1518 code: "Electronic Throttle Module to PCM Communication". Go to 2005 Chevy Trailblazer 6 Cyl Four Wheel Drive Automatic 95k Miles DTC P1681 Driver 5 Line 1 ActiveP1511 Throttle Control System - Backup System Performance DTC P1501 Vehicle Speed Sensor Circuit Intermittent. Remember that the engine block to battery negative voltage-drop test had passed several times. my truck will not keep running.what do you think is wrong.i took the pcm fuse out not knowing what would happen,my check engine light came on and across the dash it read engine power lowered so i put the fuse back the check engine light went out,but since then my truck will not stay running. The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. Here are 11 steps to help clean any cars engine compartment. After all was secured, I coated G105 with an anti-corrosion aerosol. DTC P1555 Electronic Variable Orifice Output JavaScript is disabled. (If I had to do that test again, I would have used a larger-amperage lamp and measured the ECMs amperage flow with the engine running at the ECMs G103 ground.) Sensor Low Voltage DTC P1511 Throttle Control System - Backup System Performance Mechanical problem with the intake manifold or linkage Failed IMRC actuator Wiring problems Faulty PCM What are the symptoms of code P1518? Grimes, from the research I was able to do, this problem appears to have two primary causes: the throttle body connector/wiring, and the throttle body ground (G103). Did you perform the Diagnostic System Check-Engine Controls? Disconnect the powertrain control module (PCM) connector containing the TAC module serial data circuits. Does the truck start? DTC P1652 Powertrain Induced Chassis Pitch Output Circuit Intermittent Low Voltage P1804 Ground Control Relay P1810 TFP Valve Position Switch Circuit P1811 Maximum Adapt and Long Shift P1812 Transmission Over Temperature Condition Pasted as rich text. P1622 Cylinder SelectP1623 Transmission Temp Pull-Up Resistor P1781 Engine Torque Signal Circuit P1790 Transmission Control Module Checksum Under certain conditions the control module commands the engine OFF. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). P1525 Throttle Body ServiceRequired P1526 Minimum Throttle Position Not Learned Sens. Thanks for this post. And, with the added loads of the engine oil level switch, intake air temperature sensor, and park/neutral position switch, could a frayed ground wire cause an intermittent failure of the ECM? DTC P1522 Park/Neutral to Drive/Reverse at High RPM Powertrain Control Module (PCM) Connector End Views. Just seems like it has a lack of power. But, the logic is simple: the ECM commands the starter relay to crank the engine and, with the exception of the voltmeter being sourced from the ignition switch, the operating information displayed on the instrument cluster is relayed to the cluster via a data bus from the ECM. The ECM and the TAC module are linked via a dedicated class 2 bus wire, which might explain the Reduced Power complaint and the P1518 DTC. When my truck is wot some times it will shut down and says reduced engin power.I scand it and three fault codes came up .1. p1516 electronic throttle module tp 2. p1518 electronic throttle module to pcm communication 3. p2108 unknown fault. This third Diagnostic Dilemma was postponed until the school district began its fiscal year in July. Well they looked at it and they replaced the coolant and housing (I am not exactly sure what this means I am copying this off the bill) and the did a fuel injection service and throttle body service. My 2004 Grand Prix won't start it throws 10 codes. PCM. ) P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air onto the 3 Months Ago We Replaced The #2 Coil. Low Voltage The control module records the operating conditions at the time the diagnostic DTC P1686 Driver 5 Line 6 The Ecm B Fuse Keeps Blowing As Soon As You Turn On The Key. Included among the diagnostic trouble codes was the now-familiar P1518. P1237 Injector Circuit Cylinder 6 Intermittent P1372 Crankshaft Position (CKP) Sensor A-B Correlation You need to get a scanner to use to check for codes. P1271 Accelerator Pedal Position (APP) Sensor 1-2 Correlation DTC P1655 EVAP Purge Solenoid Control Circuit On the negative side, the Yukon was now in a hard-failure Reduced Power mode, and the P1515 and P2135 codes are now repeatable DTCs. Recently in the past couple weeks I have noticed that when I get on the gas and any speed the truck seems to hesitate all the way through accelerating and even at steady speeds on the highway. Grounds G103 and G104 (and the body-to-engine ground cable) also ground feed through G105, which proved to be the critical clue in this months Diagnostic Dilemma. High Voltage The Shop Squad is assembling to advance the automotive repair industry through ediucation, resources and dialoge. P1819 Internal Mode Switch - No Start\Wrong Range The TB now loses power and (Reduced Engine Power) light comes on. P1519 Throttle Actuator Control (TAC) Module Internal Circuit The control module turns OFF the malfunction indicator lamp (MIL) P1892 Throttle Position Sensor PWM Signal High As mentioned previously, splice S103 passed testing with a 2.5-amp load. . The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1847 2-3 Shift Solenoid Circuit High Voltage Does the DMM indicate OL for both circuits? Is this causing my car to shake, lose power because I was only go no more than thirty miles per hour? P1441 Evaporative Emission (EVAP) System Flow During Non-Purge High Voltage P1189 Engine Oil Pressure (EOP) Switch Circuit Disconnect the PCM connector that contains the TAC module serial data circuits. Disclaimer: Links on this page pointing P1518 CHEVROLET - Electronic Throttle Module to PCM Communication. DTC P1528 Governor The PCM is lagging several seconds to come online, so the TAC module stores a code P1518. P1853 Brake Band Apply Solenoid High Voltage "Reduced Power" or "Limp Mode" which is designed to get the car where it is My Mother's Suv Is A 1500 Z71. Since you replaced the throttle position sensor and it didn't fix the problem, you may have an issue with the TAC module, the PCM, or the wiring and connectors. I had the car towed to my house where it has sat for two weeks. DTC P1657 1-4 Upshift Solenoid Control Circuit 2016 Yukon Denali radiator cooling fan runs after engine shut off. I took it to the dealer and they said they have never seen this and they will have to call up GM. RespondingP1510 Throttle Control System Performance - Throttle Limitation P1844 Torque Reduction Signal Circuit Desired By TCM P1315 Ignition Coil 4 Primary Feedback Circuit No other codes are associated. Disconnect the TAC module 16-way harness connector. DTCP1518 sets because no communication is detected by the TAC module from the PCM. Raising the engine speed changes the polarity of the transistors in the throttle actuator motor. DTC P1504 Vehicle Speed Output Circuit DTC P1548 A/C Recirculation Circuit Replace the TAC module. p1518 1 Answer +1 vote answered Jan 28, 2017 by anonymous Best answer Ford used butterfly valves to change the path of the intake air during different running conditions on the motor. P1370 IC 4X Reference Circuit Too Many Pulses Sensor Performance If the PCM detects a communication error, DTC P1518 sets. IlluminationP1701 Trans. There is a small hose that sits under the Votec Box. I have a 2003 Yukon XL, 106,000 miles, that just had a replacement engine installed (of unknown mileage). P1588 Cruise Control Clutch Control Circuit High P1392 Wheel Speed Sensor 1 - G - Sensor Circuit Low Voltage Ground connection G103, behind the passenger side cylinder head, was not even finger tight! MIL Request Circuit P1705 P/N Signal Output Circuit P1740 Torque Reduction Signal Circuit P1743 TP Signal from ECM P1760 TCM Supply Voltage Interrupted P1779 Engine Torque Delivered to TCM Signal 03 2500hd 2wd auto 6.0 litre. P1138 HO2S Bank 1 Sensor 2 Rich or High Voltage P1225 Injector Circuit Cylinder 2 Intermittent is a German Opel derivative, the Catera uses the European ISO 9141 protocol. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. 3 The ignition voltage is more than 5.23volts. DTCP1518 sets when there is a short to B+ on the TAC module ground circuit. P1404 Exhaust Gas Recirculation (EGR) Closed Position P1220 Throttle Position (TP) Sensor 2 Circuit I noticed at 36% throttle, P1518 sets and then goes into limp mode. 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P1393 Wheel Speed Sensor 1 - G - Sensor Circuit High Voltage ModuleP1390 Wheel Speed Sensor 1 - G - Sensor Circuit P1367 IC Cylinder 7 Not Toggling After Enable P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. Reduced Engine Power mode. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). DisabledP1537 A/C Request Circuit Low Voltage P1538 A/C Request Circuit High Voltage P1539 A/C Clutch Status Circuit High Voltage and DTC P1644 Traction Control Delivered Torque Output Circuit Low Voltage P1188 EOT Sensor Ckt. Turn ON the ignition, with the engine OFF. The Yukons ECM shares ground G103 at the right cylinder head with the engine oil level switch, intake air temperature sensor, and park/neutral position switch.
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