top of page

P0103

Overview

Code

P0103

Code Type

P

Code Class

P0

System

Engine

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0103 indicates that the mass air flow (MAF) sensor signal is higher than the normal operating range expected by the ECM

Symptoms

Check Engine Light illuminated; Rough idle; Black exhaust smoke; Poor fuel economy; Engine hesitation

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Excessively high MAF readings can lead to incorrect fuel delivery and unstable engine operation

Possible Causes

Faulty MAF sensor; Contaminated MAF sensor element; Wiring short to voltage; Intake system modifications affecting airflow

Diagnostic Steps

1 Verify the fault code and check freeze frame data; 2 Inspect wiring for shorts or damage; 3 Check intake system for improper modifications; 4 Monitor live MAF data for abnormal readings; 5 Clean or replace the MAF sensor if required

Drive Safety Notes

Driving with P0103 may cause rich fuel conditions and increased emissions Diagnosis should be performed as soon as possible

bottom of page