C1001 on Jeep: How to Diagnose & Fix
ABS Hydraulic Pump Motor Circuit
1 Jeep model · 1 documented issue · $50-$400 repair
C1001 on Jeep by model: symptoms, diagnosis and fix
The TPMS (Tire Pressure Monitoring System) sensors in Gladiators fail prematurely, often within 2-3 years. The sensors are exposed to harsh conditions — off-road impacts, mud, water crossings, and tire changes — that exceed the design life of the batteries and electronics. When sensors fail, the TPMS warning light illuminates and the system cannot monitor tire pressure. Gladiator owners who run a second set of wheels for off-road use experience double the sensor failure rate.
Common Symptoms
- TPMS warning light on dash
- Individual tire pressure readings showing dashes
- TPMS light stays on after setting correct pressure
- Intermittent TPMS readings that drop out
- All four readings lost simultaneously (module issue vs sensor)
How to Fix
Replace failed TPMS sensors with OEM Mopar sensors or quality aftermarket (Schrader or Continental). After installation, a TPMS relearn procedure is required using a TPMS tool or dealer scan tool. For owners with two sets of wheels, program both sets of sensors to the vehicle. Consider valve-stem-mounted sensors instead of band-clamp style for off-road wheels, as they are more durable. TPMS sensors are NOT covered under the 3-year/36,000-mile warranty — they are considered a wear item.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar TPMS sensor for early-build GladiatorOEMMopar 68510382AA (supersedes 68464665AA/AB)
A scan-confirmed failed TPMS sensor on a 2020 or 2021 Gladiator built through June 7, 2021 Fitment/availability: 68510382AA supersedes 68464665AA/AB and fits the early-build branch only. Confirm VIN/build date and North American 433 MHz …
- Genuine Mopar TPMS sensor for late-build GladiatorOEMMopar 68339096AB
A scan-confirmed failed TPMS sensor on a Gladiator built June 8, 2021 or later Fitment/availability: 68339096AB is the late-build 433 MHz sensor and is not compatible with trucks built June 7, 2021 or earlier. Confirm VIN/build date, whe…
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Sources for this issue (1)
C1001 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 C1001 mean on a Jeep?
C1001 stands for "ABS Hydraulic Pump Motor Circuit." This chassis/brake code points to a fault in the ABS hydraulic pump motor circuit. The pump motor pressurizes brake fluid so the ABS (and often stability control) can rapidly apply and release the brakes during a skid. When the control module detects that the motor isn't running correctly, draws abnormal current, or has a circuit fault, it sets this code and typically disables ABS, leaving you with normal (non-anti-lock) braking. It usually traces to the pump motor, its power supply, or wiring within the ABS unit. On Jeep it is documented across 1 model: Gladiator.
What are the most common causes of C1001?
The most common causes of C1001 are: Faulty ABS hydraulic pump motor, Blown fuse or faulty pump motor relay, Poor power or ground to the pump motor, Corroded, loose, or damaged motor connector, Damaged wiring in the pump motor circuit, Internal fault in the ABS hydraulic control unit, Failed ABS control module. The specific cause varies by vehicle.
How much does it cost to fix C1001 on a Jeep?
Published repair estimates on Jeep range from $50 to $400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for C1001 on a different make?
View C1001 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.