C0312Ride Height Sensor Rear Right
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Searches for C0312 in reachable J2012 lists, in GM sources and in the NHTSA bulletin index returned nothing, so only the component is described here. A ride height sensor at the right rear converts the swing of a lever arm linked to the suspension into an electrical signal, usually by inductive or Hall measurement, and feeds air suspension, damping or headlamp levelling. HELLA lists bent lever arms, broken wires, corroded plugs and water ingress as the usual failures. Makers use their own numbers here: RAM stores a stuck right rear height sensor on the 2022–23 1500 as C152A-2A and fixed it with module software, and BMW had to inspect rear sensor control rods on 2019 X5 and X7 models.
- What you may notice
- Air suspension or levelling warning message
- Rear right corner sits too high or too low
- Headlamp levelling incorrect
- Likely causes
- LikelyBent, detached or wrongly clipped sensor lever or link rod
- PossibleCorroded connector or broken wire at the rear right sensor
- PossibleSensor failed internally after water ingress
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.