C2120 on Jeep
Manufacturer-Specific TPMS Transmitter/Sensor Fault
C2120 on Jeep vehicles indicates manufacturer-specific tpms transmitter/sensor fault. Au7o has documented this code across 1 Jeep model — most commonly on Gladiator. C2120 is a manufacturer-specific chassis code within the Tire Pressure Monitoring System family (frequently Toyota/Lexus). It generally indicates a fault with a tire pressure transmitter (wheel sensor) or its signal reception, such as a missing, weak, or implausible transmission. The exact definition varies by maker. The TPMS warning light typically illuminates and one or more tire pressures may be unavailable; verify pressures manually. Typical repair costs on Jeep range from $300 to $1,500, depending on the specific model and root cause.
Common Causes of C2120
- •Weak or dead TPMS sensor battery
- •Faulty or missing tire pressure sensor
- •Sensor ID not registered/initialized
- •Receiver, antenna, or wiring fault
- •Radio-frequency interference
- •TPMS control module fault
C2120 on Jeep by Model
Jeep Gladiator(1 issue)
- Electronic Locker (E-Locker) Actuator Failure2020-2025
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.
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View C2120 across all makes →Frequently Asked Questions
What does C2120 mean on Jeep?▼
C2120 stands for "Manufacturer-Specific TPMS Transmitter/Sensor Fault." C2120 is a manufacturer-specific chassis code within the Tire Pressure Monitoring System family (frequently Toyota/Lexus). It generally indicates a fault with a tire pressure transmitter (wheel sensor) or its signal reception, such as a missing, weak, or implausible transmission. The exact definition varies by maker. The TPMS warning light typically illuminates and one or more tire pressures may be unavailable; verify pressures manually. On Jeep specifically, this code is documented across 1 model.
What causes C2120 on Jeep vehicles?▼
Common causes on Jeep: Weak or dead TPMS sensor battery, Faulty or missing tire pressure sensor, Sensor ID not registered/initialized, Receiver, antenna, or wiring fault, Radio-frequency interference. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C2120 on a Jeep?▼
Repair costs on Jeep range from $300 to $1,500, depending on the specific model and root cause.
Which Jeep models have C2120 documented?▼
Au7o has documented C2120 on 1 Jeep model: Gladiator.