Cam actuator B temperature sensor on bank 2 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.
Medium severity. Can I keep driving?Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Most likely causes
- Signal wire shorted to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P34BA means
- P: Powertrain: engine and transmission
- 3: Generic or manufacturer code, depending on the range
- 4: Emissions
- BA: Specific fault in that system
Frequently asked questions
Can I keep driving with code P34BA?
Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
What causes code P34BA?
The most common causes are: signal wire shorted to ground; connector pins corroded - high contact resistance; harness chafing through insulation.
Related codes
- P34B6B Camshaft Position Actuator Temperature Sensor Circuit Low Bank 1
- P34AAA Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2
- P34A6A Camshaft Position Actuator Temperature Sensor Circuit Low Bank 1
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.