C221B on 2015-2023 Jeep Renegade (Latitude 4x4, Trailhawk, Limited 4x4, Sport 4x4) — EDLFailSts Signal Not Valid From BRAKE7 Message
1 vehicles · 1 makes · $1,200-$2,800 repair
Most Reported On
C221B is an OBD-II diagnostic trouble code meaning “EDLFailSts Signal Not Valid From BRAKE7 Message.” The Drivetrain Control Module receives an electronic-differential-lock fail-status signal (EDLFailSts) inside the BRAKE7 CAN message broadcast by the ABS/ESC module. C221B sets when that signal arrives invalid or implausible, so the DTCM cannot trust the brake-system status it needs to arbitrate the AWD disconnect/reconnect strategy. The common suffix is C221B-64 (signal plausibility failure). Important caveat from the FCA bulletin: on Renegade/500X this code, together with C2502-64, can latch Active *erroneously* simply because a scan tool interrogated the ABS module during a diagnostic session — FCA instructs the technician to disconnect the tool, drive the vehicle ~100 feet, reconnect and read All DTCs before starting any repair. It is therefore frequently a companion/secondary code rather than the fault itself. This code is most commonly reported on 2015-2023 Jeep Renegade (Latitude 4x4, Trailhawk, Limited 4x4, Sport 4x4), with repair costs ranging from $1,200 to $2,800.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
C221B does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does C221B mean?
C221B stands for "EDLFailSts Signal Not Valid From BRAKE7 Message." The Drivetrain Control Module receives an electronic-differential-lock fail-status signal (EDLFailSts) inside the BRAKE7 CAN message broadcast by the ABS/ESC module. C221B sets when that signal arrives invalid or implausible, so the DTCM cannot trust the brake-system status it needs to arbitrate the AWD disconnect/reconnect strategy. The common suffix is C221B-64 (signal plausibility failure). Important caveat from the FCA bulletin: on Renegade/500X this code, together with C2502-64, can latch Active *erroneously* simply because a scan tool interrogated the ABS module during a diagnostic session — FCA instructs the technician to disconnect the tool, drive the vehicle ~100 feet, reconnect and read All DTCs before starting any repair. It is therefore frequently a companion/secondary code rather than the fault itself.
What are the most common causes of C221B?
The most common causes of C221B are: Fault or stored DTC in the ABS/ESC module that corrupts the BRAKE7 message, CAN bus wiring/connector fault between ABS module and DTCM, Erroneous setting during a scan-tool diagnostic session (documented FCA behavior — re-verify after driving the vehicle), Outdated DTCM software (addressed by DTCM reflash bulletins). The specific cause varies by vehicle.
How much does it cost to fix C221B?
Repair costs for C221B range from $1,200 to $2,800, depending on the vehicle and root cause.
Which vehicles are affected by C221B?
Au7o has documented C221B across 1 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.