Diagnosis & Repair

Check for an intake air leak between MAF sensor and throttle body. Ensure fuel pressure is correct. Check for a clogged or leaking fuel injector. Ensure MAF, ECT and HO2S sensors are operating properly. Check exhaust system for leaks. Perform repairs as necessary. When DTC P0170-P0175 repairs are completed, perform REPAIR CONFIRMATION DRIVE CYCLE "C" .