Code : P20E3
Make : GMC
Description : P20E3 GMC Exhaust Gas Temperature Sensor 1/3 Correlation Bank 1
Possible causes :
– Faulty Exhaust Gas Temperature Sensor
– Exhaust Gas Temperature Sensor harness is open or shorted
– Exhaust Gas Temperature Sensor circuit poor electrical connection
– Exhaust leaks
– Excessive particulate matter buildup on sensor
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.