What causes P1103 on a Honda?

Faulty Mass Airflow Sensor (MAF) Mass Airflow Sensor harness is open or shorted Mass Airflow Sensor circuit poor electrical connection

How do I fix P1103 on a Honda?

Confirm the code with a scan tool and check for related faults Inspect the sensor and its connector for corrosion, moisture, and loose pins Check the wiring for an open or short between the sensor and the control module Test the sensor signal against the factory spec before replacing parts Replace the sensor if it fails testing, then clear codes and retest

P1103 The powertrain control module saw the mass airflow sensor reading higher than expected

Q: What does P1103 mean on a Honda?

P1103. The powertrain control module saw the mass airflow sensor reading higher than expected. The engine may run rich or idle poorly because the reported airflow is wrong.. Applies to Honda and Acura models that use this code.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: Honda and Acura models that use this code

What does P1103 mean on a Honda?

P1103. The powertrain control module saw the mass airflow sensor reading higher than expected. The engine may run rich or idle poorly because the reported airflow is wrong.. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of P1103

Faulty Mass Airflow Sensor (MAF)
Mass Airflow Sensor harness is open or shorted
Mass Airflow Sensor circuit poor electrical connection

How to fix P1103

Confirm the code with a scan tool and check for related faults
Inspect the sensor and its connector for corrosion, moisture, and loose pins
Check the wiring for an open or short between the sensor and the control module
Test the sensor signal against the factory spec before replacing parts
Replace the sensor if it fails testing, then clear codes and retest

Sources and review

Checked against two independent sources.
Last updated 2026-10-02.