P0421

Checking Exhaust System for Leaks, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2C7A and/or P0421 Set – 2020-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222807 Manufacturer Communication Number: 22-NA-168 Summary This bulletin provides diagnostic information when checking the exhaust system for leaks.   Condition Some customers may comment that the MIL is illuminated. Technicians may comment on one or more of the following DTCs set in the Engine Control Module (ECM): P11D5: Nitrogen Oxides Sensor 2 Exceeded Minimum … Read more

Cooling Fans Continuously Run, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2B60, P1098, P26BB, P149D, P0421, and/or P0606 Set – 2021 Chevrolet Silverado & GMC Sierra 1500

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2021 Chevrolet Silverado 1500

NHTSA ID Number: 10198877 Manufacturer Communication Number: 21NA096   Summary This technical bulletin provides a procedure to program the ECM to correct the customers concern.     2 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 1500 2021 GMC SIERRA 1500 2021   Condition Some customers may comment on one or more of the following conditions: •   … Read more

Malfunction Indicator Lamp (MIL) Illuminated – DTC P0421, P0422, P0480, P119E, P11D0, P11DB, P11DC, P11FC, P20EE, P220B, P22A0, P22A2, P22A3 and/or P24A0 Set – 2020 Chevrolet Silverado & GMC Sierra 2500HD/ 3500HD

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2020 Chevrolet Silverado

NHTSA ID Number: 10183197 Manufacturer Communication Number: 20NA195 Summary This technical bulletin provides a procedure to replace the NOx2 sensor if found the cause of the customers concern.   Parts Information Causal Part Description Part Number Qty X SENSOR, NOX (POSN 2) 12695882 1     SEOCONTENT-START – 2020 – CRC – 10/26/20 Copyright 2020 General Motors … Read more

Service Update 18209 Diesel Turbo Exhaust Leak – 2018 Chevrolet Equinox & GMC Terrain

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2018 Chevrolet Equinox

NHTSA ID Number: 10143742 Manufacturer Communication Number: 18209 Summary 18209 – Service Update. Certain vehicles equipped with a 1.6L diesel engine (RPO LH7), may have been built with an improper alignment of the clamp/gasket assembly connecting the turbocharger to the catalytic converter. This condition may cause a diesel exhaust leak and/or smoke from the underhood area of … Read more