P1500moderate severityPowertrain
Starter Signal Circuit
on 2004 Lexus LS 430 4.3L V8 · RWD
What this code means
The ECM is not receiving the proper signal from the starter motor circuit.
Symptoms
- CEL
- Extended cranking
- Rough startup
- Poor cold start
Common causes
- Faulty starter relay
- Damaged wiring
- Poor ground
- Faulty ignition switch
Diagnostic steps
- Test starter signal wire
- Check relay operation
- Inspect wiring
- Test ignition switch
Repair notes
Repair starter signal circuit.
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P0015
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