What does code P0340 mean on a Subaru and is it safe to drive?
P0340: Camshaft Position Sensor Circuit Malfunction. Here's what it means on your Subaru, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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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 Subaru
- 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 Subaru, 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 Subaru
Subaru EJ engines see P0340 from CMP sensor failure or timing belt component wear on belt-driven models. On chain-driven FA/FB engines, verify the VVT system oil passages are not restricted before replacing the sensor.
Most commonly affected models
Outback 2005–2012Forester 2006–2013Impreza 2008–2014