OBD Codes 22, 33, 35, 45 - How to Fix for 1991 Pontiac Sunbird GT 3.1L
Hi there! I'm looking for help diagnosing and fixing OBD II fault codes 22, 33, 35, and 45 on my 1991 Pontiac Sunbird GT with a 3.1L engine. The car is non-carbureted and has been experiencing performance issues. I need accurate guidance on how to address each code based on the vehicle's specifications and common troubleshooting procedures for this model year and engine type.
Code 22: Throttle Position Sensor (TPS) out of adjustment Code 33: Mass Airflow (MAF) sensor issue Code 35: Idle Air Control (IAC) valve or circuit fault Code 45: Oxygen (O2) sensor indicating exhaust richness