B Camshaft Profile Actuator A Control Circuit Low Bank 1
What it means
P002B means the ECM sees low voltage (a short to ground or open) on the control circuit for the "B" camshaft profile actuator on bank 1 — the solenoid that switches the variable valve-lift/cam profile. With the circuit faulted, the system stays in a single profile, so you may notice reduced power or rough running in part of the rev range. The cause is almost always the control wiring or the solenoid, not engine timing.
Can I keep driving? Usually yes — the valve-lift system defaults to one profile, so expect reduced power or rough running in part of the rpm range rather than a breakdown.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or a flat spot in a certain rpm range
- Rough running
- Slightly worse fuel economy
Common causes
Most likely first
- Short to ground or low voltage in the cam profile actuator control circuit (most common)Likely
- Corroded or damaged connector at the actuator/solenoidCommon
- Faulty camshaft profile control solenoid (bank 1)Common
- Failed ECM (rare)Less often
How to diagnose & fix
Work through it in order
- Inspect the actuator connector and wiring for shorts, chafing, or corrosion.
- Measure the solenoid resistance and control-circuit voltage against spec.
- Check power and ground to the circuit.
- Replace the cam profile control solenoid if out of spec.
- If the wiring and solenoid are good, suspect the ECM. Clear and retest.
FAQ
Quick answers
Is it safe to drive with P002B?+
Can I just clear P002B?+
Related codes
Often seen with P002B
Read & clear P002B yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.