P1C11
Vacuum Pump Relay Stuck Open
P1C11 is an OBD-II diagnostic trouble code meaning: Vacuum Pump Relay Stuck Open. Common causes: faulty vacuum pump relay, broken wiring to the relay. Estimated repair cost: $17–44.
Symptoms
- Stiff brake pedal
- Reduced braking performance
- Check engine light is on
- Unusual noises from the vacuum pump
- Increased fuel consumption
Causes
- Faulty vacuum pump relay
- Broken wiring to the relay
- Short circuit in control circuit
- Problems with the engine control unit
- Mechanical jamming of the relay
How to Fix
- Check the condition of the vacuum pump relay
- Test the relay control circuit for opens and short circuits
- Check the voltage at the relay terminals
- Replace faulty relay
- Check the operation of the vacuum pump after replacement
Related codes
FAQ
What does the P1C11 code mean?
P1C11 is an OBD-II diagnostic trouble code that indicates: Vacuum Pump Relay Stuck Open
What causes a P1C11 error code?
The most common causes of P1C11 include: Faulty vacuum pump relay; Broken wiring to the relay; Short circuit in control circuit; Problems with the engine control unit.
How do I fix a P1C11 diagnostic trouble code?
To fix P1C11: Check the condition of the vacuum pump relay. Test the relay control circuit for opens and short circuits. Check the voltage at the relay terminals. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1C11?
Limited driving only, diagnose soon
How much does it cost to fix P1C11?
The estimated repair cost for P1C11 is $17–44. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat