OBD Guide

P25BF

Alternative Fuel Disable Control Circuit High

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Inability to switch to alternative fuel
  • Reduced engine power
  • Unstable engine operation
  • Increased fuel consumption

Causes

  • Open or short circuit in control circuit
  • Faulty relay or fuse
  • Wiring harness damage
  • Alternate fuel control module malfunction
  • Problems with the alternative fuel system sensor

How to Fix

  1. Check the integrity of the control circuit
  2. Check relays and fuses
  3. Inspect the wiring harness for damage
  4. Check the operation of the control module
  5. Replace faulty components

Related codes

Error P25BF by Vehicle Brand