October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Possible Causes

Possible Causes
LOW FUEL PRESSURE OR VOLUME/RESTRICTED FUEL INJECTOR
HIGH ETHANOL CONTENT (NON E85 VEHICLE)
ENGINE MECHANICAL - VACUUM LEAK
LEAK IN THE PURGE FLOW SYSTEM
EXHAUST SYSTEM LEAK
FAULTY MAP SENSOR READING
O2 SENSOR WIRING ISSUE
OXYGEN (O2) SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .