1 have a 2002 Saturn L300 that have codes of p0453 & p1283.

Question

I have a 2002 Saturn L300 that have codes of p0453 & p1283. Can you tell me how to test (and what to test) myself? i have sent the car to 2 shops and paid the diagnostic fee  and put a pedal on the vehicle , that didn't solve my problem.

Answer 1

P0453 Fuel tank pressure sensor circuit high

P1283 APP sensor 2 circuit high voltage

What these 2 code have in common is a ground from the ECM. These 2 sensor share that ground if that ground is missing you set a P0453 and a P1283. Use this diagram to test your ECM ground.