P0023: B Camshaft Position Actuator A Control Circuit/Open Bank 2
What to do
Usually driveable with reduced performance. Worth diagnosing before the fault develops further.
What this code means
A circuit fault on the bank 2 exhaust camshaft actuator. On engines carrying four phasers, the four solenoids are frequently the same part, so moving a known-good one into this position is a cheap way to separate a failed solenoid from a failed circuit before ordering anything.
Likely causes
Start here
- Failed camshaft oil control solenoid · easy
- Corroded or loose connector · easy
- Open circuit in solenoid wiring · moderate
Less common
- Low or dirty engine oil · easy
Rare
- Control module driver failure · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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