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Fault code P0335 means crankshaft sensor signal missing or implausible. The ECU does not receive a reliable crankshaft position signal: without it, it does not control injection and ignition.

Typical symptoms

• The engine cranks but does not start
• Sudden stalling, often when hot
• Rev counter fluctuating or staying at zero

Most common causes

• Failed crankshaft sensor (typically gives up with heat)
• Oxidised wiring or connector
• Reluctor ring damaged or fouled with metal filings
• Wrong air gap after a repair

How it is checked in diagnosis

• Reading the signal during cranking
• Checking the sensor signal with an oscilloscope
• Inspecting the reluctor ring

Can you drive with code P0335?

Risky: the engine can stall suddenly, with loss of power steering and brake assistance.

How MasterTuning helps

We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.

Read more: vehicle database · find an installer · what is ECU remapping

Do you have code P0335 on your car? Book a diagnosis at your nearest MasterTuning centre.

Frequently asked questions

What does fault code P0335 mean?

Code P0335 means crankshaft sensor signal missing or implausible. The ECU does not receive a reliable crankshaft position signal: without it, it does not control injection and ignition.

Can you drive with fault P0335?

Risky: the engine can stall suddenly, with loss of power steering and brake assistance.

Is clearing code P0335 enough to fix it?

No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.

How much does it cost to fix code P0335?

It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.