P0707
Transmission Range Sensor Circuit Range/Performance
Powertrain Transmission Control Gear Position Detection 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

Your transmission's position sensor is sending a signal that's outside its normal operating range, like a speedometer needle stuck between readings. The engine computer can't reliably determine if your transmission is in Park, Drive, Reverse, or Neutral.

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Symptoms You May Notice
3 known symptoms for this code
Check Engine Light illuminated
Transmission won't shift or shifts erratically
Engine may not start or start interlock fails
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM monitors voltage from the Transmission Range Sensor (PRNDL switch) to identify gear position. The sensor produces distinct voltage levels for each gear; if the signal falls outside expected ranges or shows inconsistent transitions, a fault is detected.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Sensor Voltage 0.2V-4.8V (varies by gear position) Outside expected range or erratic fluctuation
Signal Consistency Stable voltage per gear selection Jumping between voltage levels or noise detected
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Transmission Range Sensor connector
Clean the connector pins and reseat the connection to eliminate corrosion-induced signal dropout.
2
Transmission Range Sensor wiring harness
Inspect for pinched, frayed, or damaged wires; repair or replace damaged sections.
3
Transmission Range Sensor
Replace the sensor if voltage readings remain out of spec after cleaning and wire inspection.