C0821Air Suspension Height Sensor Front Right
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0821 leaves no public trace in public lists, bulletins or maker indexes; going by its name it means the front right level sensor. HELLA builds such sensors as a housing on the body with a lever and ball joint to the axle, using potentiometer, Hall or contactless inductive elements, fed with 4 to 11 V and sending analogue, PWM, SENT or PSI5 signals. Stellantis logs the front right sensor as C1522: subcode 11, a grounded signal wire, on the 2022 Grand Wagoneer, where its STAR case notes the code can also appear after the car was jacked up or lifted, and subcode 2A for a stuck signal on the 2022-23 Ram 1500. A ground fault often hides in a wet or damaged connector at the wheel arch.
- What you may notice
- Service air suspension message
- Vehicle leans to the front right or levelling is switched off
- Likely causes
- LikelySignal wire shorted to ground by chafing, water or corrosion
- PossibleCode stored after the car was jacked or lifted, sensor at end of travel
- PossibleFront right height sensor or its lever defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.