Diagnostic Aids
Code 18 indicates an intermittent fault and may not set immediately or under all conditions. Symptoms experienced may help isolate cause of condition. A poor connection or fault in any cam sensor circuit or a faulty cam sensor may cause PCM to re-initialize injector sequence, causing a possible stumble or miss. A poor connection or fault in any crank sensor circuit or fuel control circuit or bent or missing vanes on harmonic balancer interrupter rings will cause PCM to stop pulsing injectors when fault occurs. This will cause an intermittent stumble or stall.