What does code P0340 mean on a Audi and is it safe to drive?
P0340: Camshaft Position Sensor Circuit Malfunction. Here's what it means on your Audi, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The PCM is not receiving a valid signal from the camshaft position sensor. Affects ignition timing and fuel injection.
Common causes for your Audi
- Failed camshaft position sensor
- Wiring or connector issue
- Timing chain/belt misalignment (less common)
Symptoms
- Check Engine Light
- No start or hard start
- Rough run, stalling
- Reduced power
Typical fixes
- Replace camshaft position sensor
- Repair wiring/connector
- Verify timing if sensor replacement doesn't fix
Repair cost range
For a Audi, repairs for P0340 often fall between $100 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Audi
Audi EA888 Gen 1 P0340 cam sensor fault is closely related to the timing chain tensioner failure. On Gen 1 engines, P0340 alongside a rattle at startup is an emergency—the timing chain may be about to slip. Stop driving immediately and have the chain and tensioner inspected.
Most commonly affected models