OBD Guide

B374A

Air Flow Control Position Feedback Circuit

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

Symptoms

  • Unstable idle
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Open or short circuit in wiring harness
  • Air flow control position sensor malfunction
  • Airflow control solenoid valve problems
  • Malfunction of the engine control unit (ECU)

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check Airflow Control Position Sensor
  3. Check air flow control solenoid valve
  4. Check the operation of the engine control unit (ECU)

Related codes

Error B374A by Vehicle Brand