P0085
Exhaust Valve Control Solenoid Circuit Low Bank 2
Valvetrain / exhaust valve control
Generic OBD-II
High
What it means
P0085 sets when the ECM detects low voltage (typically a short-to-ground or open) in the bank 2 exhaust valve control solenoid circuit. That solenoid helps manage exhaust valve operation, so the fault usually shows up as reduced power and a rough idle. It's an electrical circuit problem and won't prevent the engine from starting.
High
Can I keep driving? Usually drivable, but expect reduced power or a rough idle; fix it before it stresses the valvetrain.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or hesitation on acceleration
- Rough or unstable idle
- Possible slight drop in fuel economy
Common causes
Most likely first
- Faulty exhaust valve control solenoid, bank 2Likely
- Short-to-ground or open in the solenoid control wiringCommon
- Corroded or loose connector at the solenoidCommon
- Excessive resistance in the control circuitLess often
- Failed ECM/PCM driver (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data, then inspect the bank 2 solenoid connector and wiring for damage or a short-to-ground.
- Confirm the solenoid has proper power and ground with the key on.
- Measure the solenoid's resistance and continuity against spec; replace it if out of range.
- Repair any wiring or connector faults found.
- Clear the code and road-test; if the fault persists with a good circuit, suspect the ECM driver.
FAQ
Quick answers
Is it safe to drive with P0085?+
Short-term driving is usually okay, but the affected valve control can hurt performance and efficiency, so don't leave it long.
Can I just clear P0085?+
It will return until the circuit fault is repaired — this is an electrical low-voltage code, not a passing glitch.
Related codes
Often seen with P0085
Read & clear P0085 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