P2A79
Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Intermittent/Erratic
P2A79 is an OBD-II diagnostic trouble code meaning: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Intermittent/Erratic. Common causes: damage to the wiring to the pressure sensor, pressure sensor malfunction. Estimated repair cost: $28–89.
Symptoms
- Unstable operation of the engine using alternative fuel
- Check engine light comes on
- Reduced engine power
- Dips during acceleration
- Increased fuel consumption
Causes
- Damage to the wiring to the pressure sensor
- Pressure sensor malfunction
- Poor contact in connectors
- Hydraulic pump problems
- Short circuit in the sensor circuit
How to Fix
- Check the integrity of the wiring to the sensor
- Test the pressure sensor
- Clean connector contacts
- Check the operation of the hydraulic pump
- Replace pressure sensor if necessary
Related codes
Error P2A79 by Vehicle Brand
FAQ
What does the P2A79 code mean?
P2A79 is an OBD-II diagnostic trouble code that indicates: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Intermittent/Erratic
What causes a P2A79 error code?
The most common causes of P2A79 include: Damage to the wiring to the pressure sensor; Pressure sensor malfunction; Poor contact in connectors; Hydraulic pump problems.
How do I fix a P2A79 diagnostic trouble code?
To fix P2A79: Check the integrity of the wiring to the sensor. Test the pressure sensor. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2A79?
Yes, but get it checked soon
How much does it cost to fix P2A79?
The estimated repair cost for P2A79 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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