OBD Guide

P01A5

Alternative Fuel Rail Pressure Sensor Circuit Low

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable engine operation
  • Power reduction
  • Increased fuel consumption
  • Difficulty starting the engine
  • Check Engine Light Is On

Causes

  • Malfunction of the fuel rail pressure sensor
  • Open or short circuit in the sensor circuit
  • Poor contact in sensor connectors
  • Circuit Grounding Problems
  • Leaks in the fuel system
  • ECU malfunction

How to Fix

  1. Check the continuity of the pressure sensor circuit
  2. Check the contacts in the sensor and ECU connectors
  3. Check circuit grounding
  4. Check the pressure in the fuel rail
  5. Replace pressure sensor if necessary
  6. Check and eliminate leaks in the fuel system

Related codes

Error P01A5 by Vehicle Brand