Standardized generic DTCTransmission

P0707 — Transmission Range Sensor A Circuit Low

P0707 is the standardized powertrain DTC for “Transmission Range Sensor A Circuit Low.” The code identifies the monitored condition; it does not by itself prove which part failed.

Standardized generic definition

Transmission Range Sensor A Circuit Low

DTC category

Transmission

Diagnostic priority

Moderate to high depending on drivability. Limp mode, slipping, overheating, or loss of a gear warrants prompt diagnosis.

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What P0707 means

P0707 is the standardized powertrain DTC for “Transmission Range Sensor A Circuit Low.” The code identifies the monitored condition; it does not by itself prove which part failed.

Start with the stored data and the simplest external checks before replacing the component named in the code.

How to interpret the code wording

“Circuit Low” means the module saw voltage or a signal below its calibrated range. Depending on circuit design, likely test paths include a short to ground, missing reference/supply voltage, excessive resistance, poor terminal contact, or a failed sensor/actuator. Verify the circuit diagram and measure the circuit before replacing the named component.

Possible symptoms

Transmission warning or Check Engine Light
Harsh/delayed shifts
Limp mode
Possible no-shift or engagement issue

Causes to test

These are diagnostic possibilities, not a statistical parts-replacement ranking. Vehicle-specific service information takes priority.

Electrical circuit or sensor fault
Fluid level/condition problem
Solenoid/valve-body or hydraulic fault
Mechanical transmission/clutch issue
TCM power, communication, calibration, or adaptation issue

Step-by-step diagnostic workflow

Scan the TCM directly; do not rely only on the ECM code list.
Check fluid using the transmission-specific procedure and fluid specification.
Review input/output speeds, commanded gear, temperature, and companion codes.
Inspect external wiring/connectors before internal repair decisions.
Follow transmission-specific service information and relearn/adaptation steps after repair.
Clear codes only after repair, then complete an appropriate drive cycle and verify the code and symptoms do not return.

Preserve evidence: EPA OBD guidance emphasizes that stored DTCs and freeze-frame data are important to proper diagnosis. Save them before clearing codes.

Scan data worth checking

TCM codes
Input/turbine and output speed
Commanded gear
Transmission fluid temperature
Solenoid/pressure commands where supported

Severity and drivability

Moderate to high depending on drivability. Limp mode, slipping, overheating, or loss of a gear warrants prompt diagnosis.

Stop driving and investigate immediately if there is a flashing MIL, oil-pressure warning, overheating, fuel leakage, severe misfire, major loss of power, abnormal mechanical noise, or a transmission that is slipping badly.

Common diagnostic mistakes

Treating a generic transmission code as a complete diagnosis
Using the wrong fluid
Skipping TCM-specific codes and data

Related generic codes

P0706 — Transmission Range Sensor A Circuit Range/PerformanceP0708 — Transmission Range Sensor A Circuit HighP0705 — Transmission Range Sensor A Circuit — PRNDL InputP0709 — Transmission Range Sensor A Circuit IntermittentP0704 — Clutch Switch Input CircuitP0710 — Transmission Fluid Temperature Sensor A Circuit

Source and accuracy notes

Generic DTC structure and standardized definitions are governed by SAE J2012/J2012DA. Actual enable criteria, thresholds, circuit pinouts, test values, software conditions, and repair procedures vary by vehicle. Use current OEM service information for the exact year/engine/calibration and check applicable manufacturer technical service bulletins. See the site methodology and primary-reference policy.