P0023
B Camshaft Position Actuator A Control Circuit/Open Bank 2
Variable valve timing
Generic OBD-II
High
What it means
P0023 means the engine computer has detected an open or faulty electrical circuit to the Bank 2 "B" camshaft timing actuator — the VVT oil control solenoid. It's usually a wiring, connector, or solenoid fault. Variable valve timing on that bank stops responding, so the engine may idle rough and lose a little power.
High
Can I keep driving? Generally safe to keep driving — expect rough idle and slightly reduced power; repair it so variable valve timing works correctly.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle
- Slightly reduced power
- Minor drop in fuel economy
Common causes
Most likely first
- Faulty camshaft actuator / VVT oil control solenoid (Bank 2)Likely
- Open or shorted wiring in the solenoid control circuitCommon
- Loose or corroded connector at the solenoidCommon
- ECM control-driver fault (least likely)Less often
How to diagnose & fix
Work through it in order
- Inspect the Bank 2 VVT solenoid connector and wiring for damage or corrosion.
- Measure the solenoid resistance against spec; replace it if out of range.
- Check the control wire for continuity/an open back to the ECM.
- Repair the wiring or replace the solenoid, clear the code, and road-test.
FAQ
Quick answers
Is it safe to drive with P0023?+
Yes, generally — it usually just causes rough idle and slightly reduced power, not a safety issue. Still, get it fixed so valve timing works properly and emissions stay in check.
Can I just clear P0023?+
It'll clear but return quickly, because the ECM keeps testing the actuator circuit. Repair the wiring or solenoid first.
Related codes
Often seen with P0023
Read & clear P0023 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX