P2A77

Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

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

P2A76 P2A78 P2A79