P0705
System
Powertrain (Transmission)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Understand P0705, common causes, and the right TOPDON scanner to diagnose it.

Gear selector position sensor circuit fault — TCM does not know selected range.

Common symptoms

  • Wrong gear indicated
  • No crank in park/neutral
  • Trans limp

Typical causes

  • Failed range sensor on side of trans
  • Shift cable out of adjustment
  • Wiring in console harness

What scanner do you need?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Recommended TOPDON scanners

Frequently asked questions

Can I diagnose P0705 with a basic code reader?
P0705 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P0705?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.