U0437Invalid Data Received From Differential Control Module - Rear
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- The rear differential control module runs an electronic limited-slip differential or the rear clutch of an on-demand all-wheel drive. U0437 is set when a receiver gets its frames but finds torque, clutch state or counter values invalid. No manufacturer documents U0437 publicly with thresholds. GM bulletins show how the module is organised: PI1074B links a Service All Wheel Drive message with U0136 in the brake module of 2014 Enclave, Traverse and Acadia AWD to the software of the K47 rear differential module, whereas on 2020 CT5 and Corvette the eLSD logic runs inside the brake controller (20-NA-217) and no separate module exists. Jeep's 2013-14 Grand Cherokee has its own ELSD module (21-001-14). Typical result: AWD or eLSD switched off and a service message. U0136 is lost contact.
- What you may notice
- Service AWD or rear axle message
- All-wheel drive or limited-slip function inactive
- Likely causes
- LikelyRear differential module software needs reprogramming
- PossibleCorrosion at the module mounted on or near the rear axle
- RareFaulty clutch actuator or motor feeding implausible status
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €1,300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.