B Camshaft Profile Actuator C Control Circuit Low Bank 1

Common symptoms

What you'll notice

• Inspect the wiring and connections for any damage or loose connections and repair if necessary.
• Check the camshaft position sensor and replace if faulty.
• Clean or replace the camshaft profile actuator.
• Perform an engine control module (ECM) reflash or update.
• As a last resort, replace the camshaft profile actuator if all other solutions have been exhausted.

Common causes

Most likely first

1. Faulty or worn camshaft position actuator
2. Low oil pressure or insufficient lubrication to the camshaft position actuator
3. Corroded or damaged wiring or connectors in the control circuit of bank 1
4. Malfunctioning engine control module (ECM) or powertrain control module (PCM)
5. Incorrect camshaft timing due to a faulty timing chain or belt

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Decreased engine performance or power
3. Poor acceleration or hesitation when accelerating
4. Engine stalling or difficulty in starting
5. Increased fuel consumption or decreased fuel efficiency