Multi-code OBD2 diagnosis
Enter all the codes your scanner showed, not just the first one. We give you the overall severity, whether you can keep driving, the order in which to check them and how they relate to each other.
Summary
- Overall severity
- Medium
- Can I keep driving?
- Yes, but with caution
- Estimated cost
- $30 to $300
- Codes analyzed
- 1 of 1
The order below is the recommended one: first the codes that can cause the others. After each repair, clear the codes and check which ones come back.
Order of inspection
P0391 Camshaft Position Sensor B Circuit Range/Performance (Bank 2) Medium
The P0391 code means the signal from the bank 2 camshaft position sensor B is electrically valid but does not match what the computer expects. It can cause hard starting, stumbling or an engine that stalls. Look at the sensor, but also at the tone wheel and the timing chain.