Diagnostic Tips

Power Brake Booster Vacuum Pipe Replacement, DTCs C025E, C0299, P050F, P0556, P0557, P0558 and/or P0561 Set – 2014-2019 Chevrolet Impala & Malibu

by
Chevrolet

NHTSA ID Number: 10224853 Manufacturer Communication Number: 21-NA-045 Summary This service bulletin informs dealers that a new Power Brake Booster Vacuum Cap will need to be replaced when installing the revised Power Brake Booster Vacuum Pipe to correct DTCs being set due to misrouting of brake booster vacuum pipe.   Condition The purpose of this bulletin is … Read more

Poor Engine Performance in Extremely Cold Weather Conditions for LE2 Engines, Charge Air Cooler (CAC) Icing – Malfunction Indicator Lamp (MIL) Illuminated, DTC P0299, P0234, P0236, P2227, P00C7 Set – 2016-2019 Chevrolet Cruze

by
2019 Chevrolet Cruze

NHTSA ID Number: 10224857 Manufacturer Communication Number: 22-NA-007 Summary This service bulletin provides procedures to correct customer concerns of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler (CAC) Icing – Malfunction Indicator Lamp (MIL) Illuminated with DTCs P0299, P0234, P0236, P2227, P00C7 Set.   Condition Some customers may comment that when driving short distances … Read more

Safety Alert Seat / Haptic Seat Inoperative with a possible Service Drivers Assist Message – 2021 Cadillac CT4

by
2021 Cadillac CT4

NHTSA ID Number: 10201271 Manufacturer Communication Number: PIC6427B Summary This Preliminary information communicates that some vehicles may have been built with missing circuits to the drivers seat haptic motors. Engineering is aware of the issue and a Bulletin will be released in the future.   Condition Safety Alert Seat or Haptic Seat Inoperative.   Cause Circuits 3037 … Read more

LM2 Diesel DTCs P0545 or P04D1 Set – 2020-2021 Chevrolet Silverado & GMC Sierra

by
2021 Chevrolet Silverado

NHTSA ID Number: 10201272 Manufacturer Communication Number: PIP5808 Summary This Preliminary information communicates to technicians to replace the ECM and affected sensor if diagnostics leads to replacement of the ECM.   Condition: SES light is on and DTCs P0545 or P04D1 set. P0545 – Exhaust Gas Temperature Sensor 1 (B131A) Circuit Low Voltage. DTC P04D1 – Exhaust Gas … Read more

Service Adaptive Headlamp Message, Lin Bus DTC U1523 Setting After Right Headlamp Replaced – 2013-2014 Cadillac XTS

by
2014 Cadillac XTS

NHTSA ID Number: 10201273 Manufacturer Communication Number: PIC6435B Summary This Preliminary information communicates that U1523 may set after right headlamp replacement due to a part issue. Engineering is looking into the concern.   Condition Service Adaptive Headlamp message with DTC U1523 setting after right headlamp replacement.   Cause Part Issue   Correction: A parts issue previously caused … Read more