What causes P1243 on a Honda?

Dirty or sticking throttle body Faulty throttle position sensor Throttle position sensor harness is open or shorted Throttle position sensor circuit poor electrical connection

How do I fix P1243 on a Honda?

Confirm the code with a scan tool and check the throttle and pedal data Inspect the connector and wiring for corrosion, moisture, and loose pins Test the sensor or motor circuit against the factory spec Check for a binding throttle body or pedal before replacing parts Replace the failed component if it tests bad, then clear codes and retest

P1243 The powertrain control module saw the throttle plate reach less than the requested position

Q: What does P1243 mean on a Honda?

P1243. The powertrain control module saw the throttle plate reach less than the requested position. The engine may lose power or idle poorly when the throttle is commanded.. Applies to Honda and Acura models that use this code.

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Honda and Acura models that use this code

What does P1243 mean on a Honda?

P1243. The powertrain control module saw the throttle plate reach less than the requested position. The engine may lose power or idle poorly when the throttle is commanded.. This Honda-enhanced code applies to Honda and Acura models that use this code.

Common causes of P1243

Dirty or sticking throttle body
Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to fix P1243

Confirm the code with a scan tool and check the throttle and pedal data
Inspect the connector and wiring for corrosion, moisture, and loose pins
Test the sensor or motor circuit against the factory spec
Check for a binding throttle body or pedal before replacing parts
Replace the failed component if it tests bad, then clear codes and retest

Sources and review

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