Buy your Efficient and Inexpensive car diagnostic tool

Order Now

P04A2 – All makes

Code : P04A2
Make : All makes
Description : P04A2 Exhaust Pressure Control Valve ‘B’ High
Possible causes :
– Faulty Exhaust Back Pressure Valve
– Exhaust Back Pressure Valve harness is open or shorted
– Exhaust Back Pressure Valve circuit poor electrical connection
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.

Leave a Comment

Your email address will not be published.

Scroll to Top