Error P0335 – how to fix?

Code definition P0335

P0335 is a generic OBD-II DTC that indicates a fault in the crankshaft position circuit.

What does the code P335 mean

DTC P0335 Will Set When The powertrain control module (PCM) does not detect the correct operation of the crankshaft position sensor. This causes the Check Engine light to be displayed on the instrument cluster and the security mode is enabled.

What causes the code P0335?

P0335 can have various causes, such as:

• Open or short circuit in the wiring harness.
• Poor electrical connections
• Crankshaft position sensor failure
• Defective indicator board
• Defective timing belt or chain
• Defective PCM

What are the symptoms of the P0335 code?

Symptoms can be very different with P0335. The check engine light may not illuminate until symptoms occur more than once. Some vehicles may not start at all with the P0335 code and in other cases, the car may run poorly and suffer from a lack of engine power. The vehicle may stop and its fuel mileage will be worse than normal.

How can a mechanic diagnose the P0335 code?

The mechanic will start by using a scan tool to check all the codes stored in the PCM. There can be running, historical, and pending codes, and they should all be checked against the data from the frozen frames. The codes will be cleared and a road test will be performed to try to recreate the symptoms. A visual inspection of the crankshaft position sensor and its wiring is then performed.

The scan tool will be used to monitor the crankshaft position sensor and RPM signal readings. If both are within range, check the wiring. Finally, the PCM will be tested according to the test procedures specified by the manufacturer.

The most common errors when diagnosing the P0335 code

Even experienced technicians can make a mistake in diagnosing arbitrary code if all diagnostic steps are not followed in the correct order. The most common cause of P0335 is the crankshaft position sensor, but all components should be checked so that things such as a damaged sensor ring or timing belt are not overlooked.

How serious is the P0335 code?

The P0335 code may indicate some serious mechanical or electrical problems in the engine. If you experience problems with driving, do not drive the vehicle until it has been repaired. On some vehicles, the engine may start to run poorly, then stall and not restart. In both cases, a diagnosis must be made to prevent damage.

What repairs can fix the P0335 code?

Common repairs that P0335 can fix:

• Crankshaft sensor replacement.
• Repair or replacement of the wiring harness
• PCM replacement
• Replacement of the signaling board
• Repair of the engine timing belt or the timing chain with any mechanical damage to the timing belt or timing chain.

Additional considerations to consider the P0335 code

The crankshaft position sensor is used to monitor the rotational speed of the crankshaft. The computer reads this in revolutions per minute. The PCM uses a crankshaft position sensor and a camshaft position sensor to remap the fuel and timing.

The advanced level scan tool is an important diagnostic tool for P0335. The scan tool is used to monitor the operation of the crankshaft position sensor. In addition, a scan tool allows technicians to look at engine RPM and camshaft position data to help find fault location.