P2A78
Alternative Fuel Hydraulic Pump Pressure Sensor Circuit High
P2A78 is an OBD-II diagnostic trouble code meaning: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit High. Common causes: malfunction of the hydraulic pump pressure sensor, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.
Symptoms
- The Check Engine light comes on
- Reduced engine power
- Unstable engine operation
- The car goes into emergency mode
- Problems with switching to alternative fuels
Causes
- Malfunction of the hydraulic pump pressure sensor
- Open or short circuit in the sensor circuit
- Alternative Fuel Hydraulic Pump Problems
- Corrosion or poor contact in connectors
- Engine control unit malfunction
How to Fix
- Check connections and sensor wiring harness
- Test the pressure sensor with a multimeter
- Check alternative fuel hydraulic pump
- Replace pressure sensor if necessary
- Reset the code and check the system after repair
Related codes
Error P2A78 by Vehicle Brand
FAQ
What does the P2A78 code mean?
P2A78 is an OBD-II diagnostic trouble code that indicates: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit High
What causes a P2A78 error code?
The most common causes of P2A78 include: Malfunction of the hydraulic pump pressure sensor; Open or short circuit in the sensor circuit; Alternative Fuel Hydraulic Pump Problems; Corrosion or poor contact in connectors.
How do I fix a P2A78 diagnostic trouble code?
To fix P2A78: Check connections and sensor wiring harness. Test the pressure sensor with a multimeter. Check alternative fuel hydraulic pump. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2A78?
Yes, but get it checked soon
How much does it cost to fix P2A78?
The estimated repair cost for P2A78 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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