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Nissan Pulsar 2001 N16 P0335 Error: Diagnosis, Symptoms, and Solutions

Model: Nissan Pulsar 2001 Fault Code: P0335 Posted: 2017-07-17 07:11

I own a 2001 Nissan Pulsar N16 with the check engine light permanently illuminated. A mechanic diagnosed the issue as OBD-II code P0335 — indicating a crankshaft position sensor fault. I replaced both the crankshaft and camshaft position sensors, cleared the code, but the check engine light returned shortly after. The engine now runs weak, especially when climbing hills, and the RPM gauge fluctuates significantly during idle and while driving. A second mechanic confirmed the same P0335 error and suggested changing the transmission fluid, though this seems unrelated to the sensor issue. I have tested all spark plugs and coils — they are functioning properly. The irregular RPM behavior and a noticeable engine hum that syncs with the RPM needle suggest deeper mechanical issues. I suspect either a faulty wiring harness or a timing belt problem. The intermittent humming sound during driving may indicate a slipping or misaligned timing belt. After replacing both sensors twice with genuine Nissan parts, no improvement has been seen. I am now focusing on inspecting the sensor wiring for shorts or opens and evaluating the condition of the timing belt. If these components are found to be faulty, it could explain both the P0335 code and the engine performance issues. I hope to resolve this and share my findings with fellow owners in the community.

Related fault codes

P0335

Comments (6)

Anonymous 2017-07-17 10:07

The P0335 error can stem from multiple sources including sensor failure, wiring faults, connector corrosion, or timing issues. A professional diagnosis is essential to pinpoint the exact cause. Check for loose connections, damaged wiring, or misalignment in the timing system. If available, use a volt/ohm meter and refer to the vehicle's electrical diagram to verify circuit integrity. Changing transmission fluid is unlikely to resolve P0335 as it’s unrelated to crankshaft position sensing.

Anonymous 2017-07-17 16:09

Thanks for the insight — I'll check those points today. Does the unstable RPM at idle also point to the same root cause?

Anonymous 2017-07-17 16:57

The fluctuating RPM is likely related to the P0335 issue. Once the crankshaft sensor signal is stabilized, idle control should improve. If the problem persists after fixing the sensor circuit, consider inspecting the idle air control valve for faults.

Anonymous 2017-07-17 18:47

The RPM instability occurs both at idle and while driving. I can hear a sound that matches the RPM fluctuations — this strongly suggests mechanical issues. Since I've already replaced both crank and cam sensors with genuine parts, the problem is likely in the wiring harness or timing belt. The intermittent humming noise during drive may indicate a slipping or loose timing belt. These symptoms are now aligning with your suggestions about timing system faults. I'm confident that resolving this will help other Pulsar N16 owners facing similar issues.

Anonymous 2017-07-18 08:43

If no clear wiring faults are found, consider having a technician compare the signal patterns from known-good and suspect crank/cam sensors using an oscilloscope. Unusual engine noises like rattling or humming could indicate timing chain or tensioner issues. A loose or worn timing chain may produce intermittent signals that mimic sensor faults and result in P0335. These problems are often visible on waveform analysis, especially when the chain is slipping.

Anonymous 2017-12-01 01:03

I'm still struggling with the same P0335 code despite replacing both crank and cam sensors multiple times with original Nissan parts. I recently noticed a noise coming from the camshaft cover — it stops when I open the oil fill cap. I replaced the PCV valve, but that didn’t help. This suggests possible internal pressure or seal issues in the cam cover. I’m now at a loss as to whether this is a sensor issue or a mechanical one. If anyone has successfully resolved P0335 on their 2001 Nissan Pulsar N16, I’d greatly appreciate sharing your experience.