P264C Fault Code

A Rocker Arm Actuator Position Sensor Circuit Low Bank 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P264C fault code indicates that there is an issue with the Rocker Arm Actuator Position Sensor Circuit for Bank 1. This sensor plays a critical role in the variable valve timing system by monitoring the position of the rocker arm actuators, which can affect engine performance. If the circuit voltage is detected to be lower than expected, it could indicate a wiring issue, a faulty sensor, or a problem within the engine control module (ECM).

What are the symptoms of the P264C code?

Common symptoms associated with the P264C fault code may include:

• Check engine light illuminated on the dashboard
• Decrease in engine performance or power
• Rough idling or stalling
• Poor fuel economy
• Increased emissions due to improper timing

What causes the P264C code?

Several factors can cause the P264C fault code, including:

• Faulty rocker arm actuator position sensor
• Open or shorted wiring in the sensor circuit
• Poor electrical connections or corroded connectors
• Malfunctioning engine control module (ECM)
• Low engine oil levels affecting actuator movement

How to fix P264C?

To resolve the P264C fault code, the following steps are recommended:

1. Start by performing a visual inspection of the wiring and connectors associated with the rocker arm actuator position sensor for any signs of damage or corrosion.
2. Use a multimeter to check the resistance and voltage at the sensor connections to determine if the sensor is functioning correctly.
3. Replace the rocker arm actuator position sensor if it is found to be faulty.
4. Repair any damaged wiring or poor connections in the sensor circuit.
5. Clear the fault codes and perform a test drive to ensure the issue is resolved. If the code reappears, further diagnosis of the ECM may be necessary.