P2650 Fault Code

B Rocker Arm Actuator Control Circuit/Open Bank 1

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

The P2650 fault code indicates a malfunction in the rocker arm actuator control circuit for Bank 1 of the engine. This circuit is crucial for the proper operation of the Variable Valve Timing (VVT) system, which optimizes engine performance and efficiency by adjusting the timing of the intake and exhaust valves. If there's an issue detected, it can affect engine performance, fuel efficiency, and emissions control.

What are the symptoms of the P2650 code?

Symptoms associated with the P2650 code may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Rough idling or stalling
• Decreased engine power and performance
• Poor fuel economy
• Unusual engine noises from the valve train.

What causes the P2650 code?

Common causes for the P2650 fault may include:

• Open or shorted wiring in the rocker arm actuator circuit
• Faulty rocker arm actuator
• Malfunctioning Engine Control Module (ECM)
• Bad connectors or poor electrical connections
• Low engine oil level or contaminated oil affecting actuator performance.

How to fix P2650?

To resolve the P2650 fault code, consider the following steps:

• Inspect the wiring and connectors for the rocker arm actuator for any damage or corrosion.
• Test the rocker arm actuator with a multimeter to ensure it is functioning properly.
• Check the oil level and quality; replace if necessary to ensure the actuator operates under optimal conditions.
• If the actuator and wiring are in good condition, consider reprogramming or replacing the ECM if a fault is suspected.