P1427
Brake System Vacuum Pump Activation Short To Positive
P1427 is an OBD-II diagnostic trouble code meaning: Brake System Vacuum Pump Activation Short To Positive. Common causes: broken or damaged wiring in the pump control circuit, short circuit to positive in the pump activation circuit. Estimated repair cost: $17–89.
Symptoms
- Check Engine Light Is On
- Hard brake pedal
- Reduced braking performance
- Noise from a constantly running vacuum pump
Causes
- Broken or damaged wiring in the pump control circuit
- Short circuit to positive in the pump activation circuit
- Vacuum pump relay malfunction
- Problems in the control unit
- Malfunction of the vacuum pump itself
How to Fix
- Check the integrity of the wiring to the vacuum pump
- Check vacuum pump relay
- Check the resistance and operation of the pump solenoid valve
- Diagnose the control unit for errors
- If necessary, replace the vacuum pump
Related codes
FAQ
What does the P1427 code mean?
P1427 is an OBD-II diagnostic trouble code that indicates: Brake System Vacuum Pump Activation Short To Positive
What causes a P1427 error code?
The most common causes of P1427 include: Broken or damaged wiring in the pump control circuit; Short circuit to positive in the pump activation circuit; Vacuum pump relay malfunction; Problems in the control unit.
How do I fix a P1427 diagnostic trouble code?
To fix P1427: Check the integrity of the wiring to the vacuum pump. Check vacuum pump relay. Check the resistance and operation of the pump solenoid valve. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1427?
Do not drive — repair immediately
How much does it cost to fix P1427?
The estimated repair cost for P1427 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat