Diagnostic Procedures
- Start engine. Check if DTC P0336 is active. If DTC P0336 is not active, problem is intermittent. See DIAGNOSTIC AIDS. If DTC P0336 is active, go to next step.
- Monitor scan tool RPM on initial start up. If RPM increases by several thousand, then return to normal, go to next step. If RPM does not increase, check connections to CKP sensor and PCM ground.
- Check for Electromagnetic Interference (EMI) cause by ignition cables routed too close to CKP sensor. Check for faulty generator.