OBD-II code · Powertrain (generic)
P0343 Camshaft Position Sensor "A" Circuit High Input (Bank 1)
The CMP signal voltage is above the upper threshold. Either excessive sensor output or a short to supply voltage.
Is it safe to drive with P0343?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to supply voltage
- PossibleSensor failed
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Camshaft Position Sensor, Camshaft Position Sensor Wiring
Related codes
- P0340Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
- P0341Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1)
- P0342Camshaft Position Sensor "A" Circuit Low Input (Bank 1)
- P0344Camshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor)
- P0345Camshaft Position Sensor "A" Circuit (Bank 2)
- P0346Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.