C212A on 2020-2025 Jeep Gladiator — Manufacturer-Specific TPMS Transmitter/Sensor Fault
1 vehicles · 1 makes · $300-$1,500 repair
How to diagnose and fix C212A: most-reported vehicles
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Jeep Gladiator · 2020–2025
The electronic locking rear differential (standard on Rubicon, optional on others) develops actuator failures that prevent the e-locker from engaging or disengaging. The electric motor actuator that engages the locking ring can fail from moisture intrusion, corrosion, or internal motor burnout — particularly after water crossings or heavy off-road use. When stuck in the locked position, the differential causes binding and tire chirping on pavement. When stuck disengaged, it fails to provide traction when needed.
Common Symptoms
- E-locker will not engage when switch is pressed
- Locker indicator light flashes but does not go solid
- Differential stays locked on pavement causing tire chirp
- Grinding noise when attempting to engage locker
- Axle locker warning light on dashboard
- Clicking from rear differential area
How to Fix
Diagnose with scan tool to confirm actuator motor circuit fault. Replace the e-locker actuator motor — this is accessible from under the vehicle without removing the differential. Clean and apply dielectric grease to the actuator electrical connector. If the locking ring inside the differential is damaged, the differential carrier requires replacement. After repair, perform an e-locker cycle test (engage/disengage 5 times) to confirm proper operation. Apply differential breather extension to prevent future moisture intrusion.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar axle-locker actuator kit, current AB revisionOEMMopar 68391561AB (supersedes 68391561AA)
A scan/current/travel-confirmed failed factory axle-locker actuator on a compatible Gladiator axle Fitment/availability: 68391561AB is the current actuator and supersedes 68391561AA plus earlier numbers. Confirm VIN, front/rear axle, axl…
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Sources for this issue (1)
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C212A 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 C212A mean?
C212A stands for "Manufacturer-Specific TPMS Transmitter/Sensor Fault." C212A is an obscure manufacturer-specific chassis code within the Tire Pressure Monitoring System code family. It generally indicates a transmitter (wheel sensor) or signal-reception fault detected by the TPMS ECU. Because the exact definition is maker-specific and could not be confirmed against a public standard, it should be interpreted conservatively as a TPMS sensor/transmitter circuit fault. The TPMS warning light usually comes on and a tire pressure value may not be reported.
What are the most common causes of C212A?
The most common causes of C212A are: Weak or dead TPMS sensor battery, Faulty or missing tire pressure transmitter, Sensor ID not registered to the ECU, Receiver/antenna or wiring fault, RF interference, TPMS module fault. The specific cause varies by vehicle.
How much does it cost to fix C212A?
Repair costs for C212A range from $300 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by C212A?
Au7o has documented C212A 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.