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Fault code P0340 means camshaft sensor signal missing or implausible. The camshaft position reference is missing: the engine can still start, but with longer cranking.

Typical symptoms

• Prolonged starting
• Rough engine
• Loss of power
• Engine light on

Most common causes

• Failed camshaft sensor
• Faulty connector or wiring
• Damaged camshaft reluctor ring
• Stretched chain shifting the reference

How it is checked in diagnosis

• Reading the signal in real time
• Comparing with the crankshaft sensor signal
• Mechanical timing check if the signals do not match

Can you drive with code P0340?

Yes, but with hard starting and a risk that the fault gets worse.

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 P0340 on your car? Book a diagnosis at your nearest MasterTuning centre.

Frequently asked questions

What does fault code P0340 mean?

Code P0340 means camshaft sensor signal missing or implausible. The camshaft position reference is missing: the engine can still start, but with longer cranking.

Can you drive with fault P0340?

Yes, but with hard starting and a risk that the fault gets worse.

Is clearing code P0340 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 P0340?

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.