2017 Mercedes-Benz P0340: What It Means & Is It Safe to Drive?
P0340 on the 2017 Mercedes-Benz: Camshaft Position Sensor Circuit Malfunction. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2017 Mercedes-Benz
- 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 2017 Mercedes-Benz, repairs for P0340 typically fall between $100 and $500, depending on the root cause and labor rates in your area.
Known issues on Mercedes-Benz
Mercedes M272 P0340 cam sensor fault on Bank 1 is a strong indicator of the balance shaft gear issue affecting intake cam timing correlation. Have the balance shaft gear inspected before assuming a sensor failure. A healthy M272 rarely develops cam sensor failures without the balance shaft being involved.
Most commonly affected models