Ignition Switch Run/Start Position Circuit High
The P2537 code means the vehicle's onboard diagnostic system has detected: Ignition Switch Run/Start Position Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $700 (parts and labor)
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Common Symptoms
- Starter motor engages when it should not
- Engine cranking in run position
- Starter remaining engaged after engine starts
- Grinding noise from starter area
Probable Causes (Ranked by Likelihood)
- Short to voltage in start circuit Very High
- Ignition switch start contacts welded closed High
- Starter relay stuck engaged Moderate
- Aftermarket remote start malfunction Low
Step-by-Step Diagnostic Procedure
-
Check for voltage on start circuit with key in run position only
-
Test ignition switch for stuck start contacts
-
Inspect starter relay for welded contacts
-
Verify aftermarket remote start system wiring
Frequently Asked Questions
Why does my starter keep running after the engine starts?
P2537 indicates the start signal remains high. The starter relay stays engaged, grinding the starter gear against the flywheel. Turn off the engine immediately.
Can a stuck starter damage the flywheel?
Yes. A continuously engaged starter can damage the flywheel ring gear teeth and burn out the starter motor. This requires immediate attention.
Is it safe to start the engine with P2537?
No. If the starter cannot disengage, it will be destroyed and can damage the flywheel. Diagnose and repair before attempting to start the engine.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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