The crankshaft position (CKP) sensor produces an AC voltage of different amplitude and frequency depending on the velocity of the crankshaft. The crankshaft has 7 total machined notches, 6 of which are spaced 60 degrees apart. The remaining tooth is 10 degrees before the #4 cylinder top dead center (TDC) notch. This extra notch is used by the PCM to determine the position of the top dead center #4 cylinder necessary to synchronize engine position. The CKP sensor is used for fuel delivery, spark timing and misfire diagnostics. DTC P0336 sets when the number of pulses or time between pulses is not valid.
DTC Parameters
DTC P0336 will set if extra or missing crankshaft sensor pulses are detected or the time between notches is too long or too short.
DTC P0336 diagnostic runs continuously with engine running.
DTC P0336 is a type B DTC.
Diagnostic Aids
DTC P0336 can set due to the following:
| • | An intermittent open anywhere in the CKP circuit |
| • | An intermittent short to voltage anywhere in the CKP circuit |
| • | An electromagnetic interference (EMI) caused by high current carrying wiring routed near the CKP sensor wiring |
| EMI can alter the amplitude and/or frequency of the CKP signal and create invalid CKP pulses. |
An intermittent open anywhere in the CKP circuit will cause the tachometer to drop out and most likely stall or disrupt engine operation.
Important: A short to ground on circuit 573 or 574 will NOT affect the CKP sensor circuit.
Important: If the crankshaft is replaced, the crankshaft MUST be relearned. If the crankshaft is not relearned, false misfire DTCs may set.
An intermittent short to voltage or EMI anywhere in the circuit will cause the tachometer to drop out and may momentarily disrupt engine operation.
