AIR system -flow excessively high or low
Engine control relay
Crank Position System Variation Not Learned
Vacuum Leak Found IAC Fully Seated
Lean Operation at Wide Open Throttle
Oxygen sensors, downstream -signal mismatch
Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -implausible signal
Mass air flow (MAF) sensor -circuit performance
Mass air flow (MAF) sensor range/performance