OBD-II code · Powertrain (manufacturer / generic)
P34BE B Camshaft Position Actuator Position Sensor A Circuit Low Bank 1
Cam actuator B position sensor on bank 1 signal voltage below expected range. The camshaft position sensor identifies which cylinder is on the compression stroke — without it the ECM cannot run sequential injection or coil-on-plug ignition correctly.
Is it safe to drive with P34BE?
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 ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Cam Actuator B Pos Sensor B1, Sensor Wiring
Related codes
- P2B41A Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
- P2B45A Camshaft Position Actuator Position Sensor B Circuit Low Bank 2
- P2B49B Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
- P2B4DB Camshaft Position Actuator Position Sensor B Circuit Low Bank 2
- P34AEA Camshaft Position Actuator Position Sensor A Circuit Low Bank 1
- P34B2A Camshaft Position Actuator Position Sensor A Circuit Low Bank 2
- P34C2B Camshaft Position Actuator Position Sensor A Circuit Low Bank 2
- P34BBB Camshaft Position Actuator Temperature Sensor Circuit High Bank 2
- P34BCB Camshaft Position Actuator Position Sensor A Circuit Bank 1
- P34BDB Camshaft Position Actuator Position Sensor A Range/Performance Bank 1
- P34BFB Camshaft Position Actuator Position Sensor A Circuit High Bank 1
- P34C0B Camshaft Position Actuator Position Sensor A Circuit Bank 2
- P34C1B Camshaft Position Actuator Position Sensor A Range/Performance Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.