P0020: A Camshaft Position Actuator Circuit (Bank 2)

What it means

Electrical fault in the bank 2 intake camshaft position actuator. Same diagnostic principle as P0010 but on the second cylinder bank.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

The bank 2 intake camshaft position actuator, often controlled by an oil control valve, changes cam timing in response to the engine control module. This code sets when the actuator's electrical circuit has a fault, so the module may be unable to control bank 2 intake cam timing as commanded.

Common causes

Most likely first.

1. Oil control valve electrically failed
2. Wiring or connector fault

Symptoms

• Check engine light on
• Power loss especially in mid-rpm range
• Possible rough idle or stalling
• Increased fuel consumption

How to diagnose it

1. Save freeze-frame data and check live commanded and actual bank 2 intake cam timing, along with related actuator codes.
2. Check engine oil level and condition, then inspect the bank 2 intake oil control valve connector and wiring for looseness, corrosion, or damage.
3. Check the actuator circuit wiring and connector continuity using the manufacturer's procedure.
4. Test the bank 2 intake oil control valve coil against the manufacturer's specification.
5. If the circuit and valve pass, check the module command and driver using the manufacturer's diagnostic procedure.

Common fixes

• Correct low or contaminated engine oil if it is affecting cam timing control.
• Repair or secure damaged bank 2 intake actuator wiring or connector terminals.
• Replace the bank 2 intake oil control valve if its electrical test confirms failure.
• Repair a confirmed control module circuit fault.

Can I keep driving?

You may notice reduced power, rough idle, or stalling if bank 2 intake timing is not controlled properly. Avoid hard acceleration if the engine runs poorly and stop if it stalls.