OBD Guide

P01AF

Alternative Fuel Tank A Level Sensor Circuit

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

Symptoms

  • Incorrect fuel level display
  • Check Engine Light Is On
  • Problems starting the engine
  • Unstable engine operation

Causes

  • Open or short circuit in the sensor circuit
  • Fuel level sensor malfunction
  • Wiring harness damage
  • Connector problems or contact corrosion
  • Engine control unit malfunction

How to Fix

  1. Check the continuity of the fuel level sensor circuit
  2. Inspect the wiring harness for damage
  3. Check connectors and contacts for corrosion
  4. Test the fuel level sensor
  5. If necessary, replace the sensor or wiring harness
  6. Reset the error and check if it returns

Related codes

Error P01AF by Vehicle Brand