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P2A03 – All makes

Code : P2A03
Make : All makes
Description : P2A03 O2 Sensor Circuit Range/Performance Bank 2 Sensor 1
Possible causes :
– Air fuel ratio (A/F) sensor 1
– Air fuel ratio (A/F) sensor 1 heater
– Fuel pressure
– Fuel injector
– Intake air leaks
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.

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