Transmission Range Sensor Circuit Low Input
What does P0707 mean?
The P0707 code means the vehicle's onboard diagnostic system has detected: Transmission Range Sensor Circuit Low Input. This is a critical severity code.
Common Symptoms
- Check Engine Light illuminated
- Transmission stuck in one gear
- Vehicle may not start in Park
- Dashboard gear indicator incorrect
Probable Causes (Ranked by Likelihood)
- Faulty transmission range sensor Very High
- Short to ground in range sensor signal wire High
- Corroded range sensor connector Moderate
- TCM input circuit fault Low
Step-by-Step Diagnostic Procedure
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Check range sensor voltage on a scan tool -- voltage below specification indicates low input
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Inspect range sensor connector for corrosion or water intrusion
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Check signal wire for short to ground with a multimeter
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Verify 5V reference voltage at the sensor connector
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Replace the range sensor if wiring checks good
Frequently Asked Questions
Can I drive with code P0707?
Drive short distances only. The TCM receives incorrect gear position data, which can cause erratic shifting or prevent starting.
What causes low input on the range sensor?
A short to ground in the signal wire, a failed sensor with low output, or a corroded connector causing high resistance on the reference voltage are common causes.
Is P0707 related to the neutral safety switch?
Yes. On many vehicles, the transmission range sensor and neutral safety switch are the same component or are integrated together.