OBD Guide

P00BF

Mass or Volume Air Flow B Circuit Range/Performance - Air Flow Too High

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

Symptoms

  • Loss of engine power
  • Unstable engine idling
  • Increased fuel consumption
  • Difficulty starting the engine

Causes

  • Faulty mass air flow sensor (MAF)
  • Contamination of the air flow sensor
  • Problems in the power supply or grounding circuit of the mass flow sensor
  • Open or short circuit in the MAF wiring harness
  • Engine ECU malfunction

How to Fix

  1. Check the condition of the air flow sensor for contamination
  2. Check the integrity of the wiring harness and the mass air flow sensor connector
  3. Check the parameters of the power supply and grounding circuits of the mass flow sensor
  4. Clean or replace the mass air flow sensor if necessary
  5. Reset the error and check if it returns

Related codes

Error P00BF by Vehicle Brand