P1101moderate severityPowertrain
Neutral Position Switch Circuit Malfunction
on 1998 Subaru Impreza 2.5L H4 · AWD
What this code means
The PCM has detected a malfunction in the neutral position switch circuit. This switch indicates whether the transmission is in neutral, which affects idle speed control and various PCM strategies.
Symptoms
- Check Engine Light
- Incorrect idle speed in neutral
- Engine may not adjust RPM when shifted to neutral
- A/C idle-up may not function correctly
Common causes
- Faulty neutral position switch
- Switch out of adjustment
- Wiring issue in neutral switch circuit
- Corroded switch connector
- Transmission range sensor fault
Diagnostic steps
- Check neutral switch signal on scan tool while shifting
- Inspect neutral position switch and its adjustment
- Test switch circuit wiring
- Check connector for corrosion
- Verify switch changes state when shifting
Repair notes
Adjust or replace the neutral position switch; repair wiring if faulty.
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P0010
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P0013
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P0014
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P0015
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