P0705Transmission Range Sensor A Circuit (PRNDL Input)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The transmission range sensor (selector or multifunction switch, PRNDL) reports the selected range; it may be a multi-contact switch with a bit pattern per position, an analog sensor with two opposing voltages adding up to 5 V, or a contactless PWM sensor. Its second channel has its own codes (P2801–P2805). P0705 is the circuit or pattern fault: the module receives a combination that matches no valid position. Ford flags an invalid pattern after 5 s (digital sensor) or 200 ms (4-bit sensor), checking continuously with the check engine light; Saab's 9-5 (9600) detects an impossible combination of its four contacts and goes into limp mode with the gearbox warning. The transmission no longer knows the range reliably – limp mode, start interlock or reversing light may be affected. Check the harness for shorts to ground before replacing the sensor.
- What you may notice
- Check engine and/or transmission warning lamp
- Transmission limp mode, fixed gear, harsh shifts
- Starting problems in P/N or start interlock
- Wrong gear indication, reversing light not working
- Likely causes
- LikelyRange sensor worn, dirty or with oil or water ingress
- PossibleSensor misadjusted or selector cable out of adjustment
- PossibleHarness or connector at the transmission damaged, short to ground
- RareTransmission or engine module input faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.