B Rocker Arm Actuator Position Sensor Circuit Low Bank 2
The P267C code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the position sensor circuit for the B rocker arm actuator on Bank 2. This sensor monitors the position of the rocker arm actuator, which controls variable valve timing or cylinder deactivation. A low voltage signal suggests a short to ground, open circuit, or faulty sensor, potentially affecting engine performance and fuel economy.
1. Most Common Causes
- Faulty B rocker arm actuator position sensor
- Short to ground in sensor circuit wiring
- Open circuit in sensor signal or reference voltage wire
- Corroded or damaged connector at sensor or ECM
- Failed ECM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Poor fuel economy
- Rough idle or misfire
- Possible engine stalling
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the wiring and connector for the B rocker arm actuator position sensor on Bank 2 for damage, corrosion, or loose connections.
Step 3: Measure the sensor's reference voltage (typically 5V) and ground at the connector with a multimeter.
Step 4: Check the sensor signal voltage while manually actuating the rocker arm; compare to manufacturer specifications.
Step 5: If sensor and wiring are okay, test the ECM output by backprobing the ECM connector; replace sensor or repair wiring as needed.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the issue can cause reduced engine performance and potential stalling. Immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if wiring repairs or ECM replacement is needed.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.