C0450Rear Wheel Steering Position Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0450 does not occur in the accessible J2012 lists. Its only public manufacturer use is GM: bulletin PIC5321A for the 2010–2011 Cadillac DTS links C0450 with Service Power Steering and Service Brake System messages, a lit check-engine lamp and cycling door locks, caused by an engine harness chafed through on the transmission. The DTS has no rear-wheel steering, so GM evidently uses the number for a front steering function; the bulletin does not name it. For the rear-steer meaning of the title: systems such as ZF's AKC set rear toe electrically, a patent for an electric rear-steer actuator reads ball-screw travel with Hall elements, and a ONE80 patent drives the wheels back to straight ahead and locks out rear steer once the position signal is lost or wrong.
- What you may notice
- Steering or brake system warning message in the cluster
- Rear steering locked straight ahead, larger turning circle
- Check-engine lamp on some GM models
- Likely causes
- LikelyWiring harness chafed or pinched (GM DTS case at the transmission)
- PossibleFaulty position sensor in the rear steering actuator
- RareCorroded or loose connector on the actuator
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.