What does it mean?
P1795 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: A/T Accelerator Position Sensor Circuit Malfunction .
Symptoms
- MIL (check engine lamp) is on and the vehicle may go into reduced power mode
- No kickdown, and the transmission holds gears far too long or shifts far too early
- Hesitation, surging or a dead spot when accelerating
- Transmission may lock into limp mode
- Idle speed unstable or the engine does not respond to the pedal at all
- Cruise control unavailable
Likely causes
- Worn track inside the accelerator pedal position sensor, giving a dropout at part travel
- The two sensor tracks no longer agreeing with each other across the pedal stroke
- Corroded, damp or loose connector at the pedal assembly, often after a spill or a wet carpet
- Open, shorted or high-resistance signal, reference or ground wire under the dash
- Pedal mechanically binding, or a floor mat or object restricting its travel
- Missing or corrupted pedal position message reaching the transmission module
- Control module input circuit fault
How to fix it
- Watch both accelerator position signals in live data while pressing the pedal slowly from rest to the floor and back
- Look for a dropout, a stuck value, or the two tracks separating from their expected relationship
- Check the connector at the pedal for moisture, corrosion and loose terminals
- Verify both reference voltages and both grounds at the pedal connector with the ignition on
- Check for mechanical binding, carpet interference or an obstruction under the pedal
- Replace the pedal assembly once wiring is proven, then carry out the pedal relearn procedure