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

1. Check neutral switch signal on scan tool while shifting
2. Inspect neutral position switch and its adjustment
3. Test switch circuit wiring
4. Check connector for corrosion
5. Verify switch changes state when shifting

Repair notes

Adjust or replace the neutral position switch; repair wiring if faulty.

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