P00C4
Turbocharger/Supercharger Bypass Valve B - Mechanical
P00C4 is an OBD-II diagnostic trouble code meaning: Turbocharger/Supercharger Bypass Valve B - Mechanical. Common causes: bypass valve jammed, vacuum diaphragm rupture (if applicable). Estimated repair cost: $89–278.
Symptoms
- Reduced engine power
- Unstable operation at idle
- Extraneous noise from the turbocharging area
- Increased fuel consumption
- Dips during acceleration
Causes
- Bypass valve jammed
- Vacuum diaphragm rupture (if applicable)
- Malfunction of the vacuum pump or line
- Open or shorted control circuit (for electric valves)
- Mechanical damage to valve or actuator
- Contamination or carbon deposits on the valve stem
How to Fix
- Conduct a visual inspection of the valve and vacuum lines
- Check valve functionality manually (if available)
- Test the vacuum system for leaks
- Check the electrical control circuit (resistance, voltage)
- Clean or replace faulty valve
- After repair, take a test drive and reset the error.
Related codes
Error P00C4 by Vehicle Brand
FAQ
What does the P00C4 code mean?
P00C4 is an OBD-II diagnostic trouble code that indicates: Turbocharger/Supercharger Bypass Valve B - Mechanical
What causes a P00C4 error code?
The most common causes of P00C4 include: Bypass valve jammed; Vacuum diaphragm rupture (if applicable); Malfunction of the vacuum pump or line; Open or shorted control circuit (for electric valves).
How do I fix a P00C4 diagnostic trouble code?
To fix P00C4: Conduct a visual inspection of the valve and vacuum lines. Check valve functionality manually (if available). Test the vacuum system for leaks. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P00C4?
Limited driving only, diagnose soon
How much does it cost to fix P00C4?
The estimated repair cost for P00C4 is $89–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat