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
How to diagnose and fix C221B: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Jeep Renegade · 2015–2023
On 4x4/AWD Renegades (which share FCA's Small Wide 4x4 platform with the Fiat 500X and Jeep Compass), the Power Transfer Unit and rear drive unit are a recurring weak point. Owners report a growing whine or growl that rises and falls with speed, a rumble/vibration felt around 30-35 mph, and eventually a 'Service 4WD' warning. The PTU actuator and internal gears, plus the electronically controlled rear-clutch pack, wear or seize, sometimes leaving the vehicle undrivable in AWD. Note: in the US market 4x4 Renegades were offered with the 2.4L, with the 1.4L turbo and 6-speed manual (2015-2018), and with the 1.3L turbo (2019-2023).
Common Symptoms
- Whining or growling noise that changes with speed
- Rumble/vibration felt around 30-35 mph
- Service 4WD warning light
- Grinding on light throttle or coasting
- Noise disappears in manual mode or with traction control off
How to Fix
Diagnose whether noise originates at the PTU or the rear drive unit. Many 'Service 4WD' events are a failed PTU actuator rather than the whole unit, but clearance often forces full PTU replacement. A driveline software/firmware update helped reduce the 30 mph rumble on some cars, and FCA bought back at least one Renegade over an unresolvable PTU defect. Preventive PTU/transfer-case fluid service (~every 30k miles) is advised.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68267195AA PTU/transfer-case shift actuatorOEMMopar 68267195AA
PTU actuator replacement after code-guided commanded testing/removal inspection confirms actuator failure Fitment/availability: 2015-2023 Renegade AWD/4x4 catalog family; the live page shows detailed 2015-2020 engine/transmission branche…
- Genuine Mopar 68305397AB power transfer unitOEMMopar 68305397AB
Complete early PTU replacement only after internal PTU damage is proven and the exact 2.4L/948TE branch is confirmed Fitment/availability: Specified early Renegade 2.4L, 9-speed 948TE, 4WD PTU branch, superseding 68305397AA. Later 1.3L/2…
- Genuine Mopar 68280932AA front-axle/PTU synthetic SAE 75W-90 GL-5 lubricant, one quartOEMMopar 68280932AA
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Sources for this issue (4)
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C221B code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.