What it means
The compressor outlet valve control circuit has a voltage above the expected range. This indicates an electrical circuit fault; the code alone does not establish a boost-pressure fault.
At a glance
- Usually lights the check-engine light
How it works
The compressor outlet valve releases boost pressure when the throttle closes. The control module monitors its electrical control circuit, and this code sets when circuit voltage is above the expected range, often because the wire is shorted to battery voltage; the code alone does not confirm a boost-pressure fault.
Common causes
Most likely first.
- Short to B+
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine light on
- Reduced engine power or poor acceleration
- Delayed or inconsistent boost response
How to diagnose it
- Record freeze-frame data and check for related turbocharger codes to understand when the high circuit reading appeared.
- Inspect the valve connector and harness for corrosion, damaged pins, or a wire pinched against a powered source.
- Use the wiring diagram to check for a short to B+ in the valve control circuit and confirm the connector pins are seated.
- With the valve and module disconnected, test the circuit for continuity and isolation according to the manufacturer's procedure.
- If the wiring is sound, test the valve and module output using the specified diagnostic checks.
Common fixes
- Repair wiring pinched against a B+ source.
- Clean or repair corroded or damaged connector pins.
- Replace harness sections with damaged insulation or an internal short.
- Replace the compressor outlet valve if it fails its electrical test.
Can I keep driving?
A cautious drive may be possible if the engine runs normally, but avoid hard acceleration and heavy loads. Boost response may be inconsistent; stop if power loss or abnormal turbocharger noise occurs.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.