What does P1531 mean on a Ford?

P1531. Invalid Test - Accelerator Pedal Movement. Applies to All OBD-II Ford vehicles with electronic throttle.

What causes P1531 on a Ford?

Accelerator pressed during a test requiring steady pedal Pedal bumped by the tester mid-test Faulty pedal sensor sending movement spikes Floor mat shifting onto the pedal Test procedure not followed

How do I fix P1531 on a Ford?

Re-run the test with feet clear of the pedals Remove floor mat interference Verify pedal sensors read steady at rest Follow the test prompts exactly Investigate the pedal only if the code repeats hands-off

Code

P1531

Invalid Test - Accelerator Pedal Movement

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: All OBD-II Ford vehicles with electronic throttle
Related: No single generic twin. See OBD Codes List

Findings, check these first

Accelerator pressed during a test requiring steady pedal
Pedal bumped by the tester mid-test
Faulty pedal sensor sending movement spikes
Floor mat shifting onto the pedal
Test procedure not followed

Standard procedure

Re-run the test with feet clear of the pedals
Remove floor mat interference
Verify pedal sensors read steady at rest
Follow the test prompts exactly
Investigate the pedal only if the code repeats hands-off

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: qualified. Read the source limits below.

OBDII.pro: P1531 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1531: Invalid Test - Accelerator Pedal Movement
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.

Last updated 2026-09-06.

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