What Does P0707 Mean?
The TCM has detected that the Transmission Range Sensor (TRS) A circuit signal is consistently low. This means the sensor is reading at or near zero voltage or minimum resistance, which could indicate a short to ground, a stuck sensor, or a wiring fault pulling the signal low. The TCM may not be able to determine the correct gear position. The driver may experience incorrect gear display, no-start condition, or the transmission defaulting to a safe mode.
Common Causes
35%
Short to ground in the TRS signal wire — chafed insulation contacting the transmission case or body
30%
Faulty transmission range sensor with internally shorted contacts
15%
Corroded or contaminated TRS connector allowing signal leakage to ground
12%
Shift linkage or cable preventing full detent travel of the TRS
8%
TCM internal pull-down or input circuit fault
Diagnostic Steps
1
Disconnect the TRS connector and measure the signal voltage at the TCM side with key ON — if the voltage rises to reference voltage (typically 5V) with the sensor disconnected, the sensor or its wiring is shorting the signal low.
2
With the TRS disconnected, measure resistance between the signal wire and ground at the sensor connector — infinite resistance is expected. Low resistance indicates a wire-to-ground short.
3
Inspect the TRS connector for fluid contamination, corrosion, or bent pins that could create a path to ground.
4
If wiring tests pass, test the TRS itself by measuring resistance between its terminals in each gear position and comparing to the manufacturer specification chart.
5
Check the shift cable adjustment — if the cable is too tight or binding, the sensor may be held mechanically in a low-output position.
Estimated Repair Cost
$75 - $400
Parts + labor, varies by vehicle and location
The TCM has detected that the Transmission Range Sensor (TRS) A circuit signal is consistently low. This means the sensor is reading at or near zero voltage or minimum resistance, which could indicate a short to ground, a stuck sensor, or a wiring fault pulling the signal low. The TCM may not be abl...
The most common cause of P0707 (Transmission Range Sensor Circuit Range/Performance) is: Short to ground in the TRS signal wire — chafed insulation contacting the transmission case or body
Typical repair costs for P0707 range from $75 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
With the TRS reading stuck low, the TCM may not correctly identify the selected gear, potentially affecting the neutral safety switch, reverse light operation, and shift scheduling. The vehicle may default to limp mode. Do not rely on the dashboard gear indicator if this code is present — verify the actual gear position by feel before driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0707 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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