Transfer Case Neutral Position Sensor Circuit Malfunction (Ford)
What does P1707 mean?
The P1707 code means the vehicle's onboard diagnostic system has detected: Transfer Case Neutral Position Sensor Circuit Malfunction (Ford). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Transfer case not engaging properly
- 4WD indicator light malfunction
- Grinding noise when shifting transfer case
- Transfer case stuck in one mode
Probable Causes (Ranked by Likelihood)
- Faulty transfer case neutral position sensor Very High
- Corroded sensor connector High
- Transfer case shift motor malfunction Moderate
- Wiring damage between sensor and PCM Low
Step-by-Step Diagnostic Procedure
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Check the transfer case mode indicator on the dashboard. Compare to the actual position.
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Inspect the transfer case neutral position sensor connector for corrosion and moisture.
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Measure the sensor output voltage at different transfer case positions.
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Test the transfer case shift motor operation by commanding mode changes with a scan tool.
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If the sensor reads correctly but the transfer case does not shift, inspect the shift motor and linkage.
Frequently Asked Questions
What is the neutral position sensor?
It detects when the transfer case is in the neutral position, which is used during flat towing or when the transfer case is between modes.
Can I flat tow my truck with this code?
Only if the transfer case is confirmed to be in neutral. An incorrect sensor reading could allow towing in gear, damaging the transfer case.
Where is the sensor located?
On most Ford 4x4 vehicles, the neutral position sensor is mounted on the outside of the transfer case housing near the shift motor.