P2A77
Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low
P2A77 is an OBD-II diagnostic trouble code meaning: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low. Common causes: malfunction of the hydraulic pump pressure sensor, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.
Symptoms
- Unstable engine operation
- Power reduction
- Increased fuel consumption
- Check Engine Light Illuminates
- Problems with switching to alternative fuels
Causes
- Malfunction of the hydraulic pump pressure sensor
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Low pressure in the hydraulic system
- Control unit malfunction
How to Fix
- Check the pressure in the hydraulic system
- Check the continuity of the pressure sensor circuit
- Check the connections and contacts of the sensor
- Replace pressure sensor if necessary
- Check the operation of the control unit
Related codes
Error P2A77 by Vehicle Brand
FAQ
What does the P2A77 code mean?
P2A77 is an OBD-II diagnostic trouble code that indicates: Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low
What causes a P2A77 error code?
The most common causes of P2A77 include: Malfunction of the hydraulic pump pressure sensor; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Low pressure in the hydraulic system.
How do I fix a P2A77 diagnostic trouble code?
To fix P2A77: Check the pressure in the hydraulic system. Check the continuity of the pressure sensor circuit. Check the connections and contacts of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2A77?
Limited driving only, diagnose soon
How much does it cost to fix P2A77?
The estimated repair cost for P2A77 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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