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System: Powertrain (P-Code) Coverage: SAE Standard (Generic) Fault Family: transmission_range_sensor_circuit

Code P0705: Transmission Range Sensor A Circuit (PRNDL Input)

Diagnostic & Technical Explanation
Code P0705 (Transmission Range Sensor A Circuit (PRNDL Input)) sets when the TCM sees an open, shorted, or implausible signal from the transmission range sensor that reports gear-selector position (Park/Reverse/Neutral/Drive/Low) to the ECM/TCM. Causes are a maladjusted or worn range sensor at the shift shaft, transmission fluid contamination fouling the sensor, or chafed wiring at the connector on the transmission case.

Probability-Ranked Repair Procedures (3 Ranked Fixes)

Rank #1

Adjust transmission range sensor

Moderate DIY
Parts Estimate: $15.0–$40.0 USD Labor Estimate: 0.7 Shop Hours
  1. 1. Locate the range sensor on the shift shaft at the transmission case
  2. 2. Loosen the sensor and align it to the neutral/park index mark per spec
  3. 3. Re-torque and verify each gear selection is confirmed by the sensor
  4. 4. Clear the code and road test
Required Replacement Parts: 🔧 Transmission fluid (manufacturer-spec)
Rank #2

Repair range sensor circuit wiring

Professional Required
Parts Estimate: $10.0–$50.0 USD Labor Estimate: 1.1 Shop Hours
  1. 1. Back-probe the range sensor circuits at the connector through each gear position
  2. 2. Trace the harness for fluid intrusion or chafing at the case connector
  3. 3. Repair with solder and heat-shrink, resealing the connector
  4. 4. Confirm correct PRNDL reporting in every position
Required Replacement Parts: 🔧 Automotive wiring repair kit (solder + heat-shrink)
Rank #3

Replace transmission range sensor

Moderate DIY
Parts Estimate: $40.0–$150.0 USD Labor Estimate: 1.0 Shop Hours
  1. 1. Disconnect the battery negative terminal
  2. 2. Remove the shift linkage and unbolt the range sensor
  3. 3. Install and align the new sensor per spec, then reconnect linkage
  4. 4. Clear the code and verify PRNDL matches actual gear
Required Replacement Parts: 🔧 Transmission range sensor

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