OBD Guide

P2A0A

Manifold Absolute Pressure Sensor B Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Rough engine operation
  • Increased fuel consumption
  • Dips during acceleration
  • Check Engine Light Is On
  • Problems starting the engine

Causes

  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • MAP B sensor malfunction
  • Problems with the engine ECU
  • Mechanical damage to the sensor

How to Fix

  1. Check the integrity of the wiring to the sensor
  2. Clean sensor connector contacts
  3. Check the functionality of the sensor with a multimeter
  4. Replace MAP sensor if necessary
  5. Test work after repair

Related codes

Error P2A0A by Vehicle Brand