Chassis, generic

C0823 Air Suspension Height Sensor Rear Right

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0823 is unknown to every public source, from code lists to the NHTSA index and maker documentation. The title refers to the rear right level sensor. Its reading matters most when loading, since the module uses the rear heights to keep ground clearance and headlamp aim constant. Stellantis gives the rear right corner its own code, C152A, and on the 2022-23 Ram 1500 with four-corner air suspension a stuck rear sensor reading was resolved by reprogramming the module, with the battery held between 13.2 and 13.5 V during the flash (08-127-23). HELLA's level sensor brief lists a 12-bit resolution and an operating range from -40 to 125 °C. A suspect sensor is checked against its lever position before replacement.

Likely causes

Rear right height sensor, lever or ball joint worn or broken
Corroded or loose sensor connector, damaged harness
Air suspension module software needing an update (Stellantis 08-127-23)

Symptoms

  • Service air suspension message
  • Rear right sits low or high, load levelling inactive

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–450
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

height sensor rrair suspension modulesensor wiring

Related codes

C0820C0821C0822C0312

References: hella.com, static.nhtsa.gov.