P0871 on Jeep
Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance
P0871 on Jeep vehicles indicates transmission fluid pressure sensor/switch "c" circuit range/performance. Au7o has documented this code across 1 Jeep model — most commonly on Wrangler. This code sets when the transmission control module receives a signal from transmission fluid pressure sensor/switch C that is out of the expected range or implausible for the current conditions. This sensor monitors hydraulic pressure inside the transmission, which the module relies on to control clutch apply and shift quality. Symptoms can include harsh, delayed, or erratic shifts, slipping, or the transmission entering a failsafe mode. The cause is typically the sensor, actual fluid pressure problems, or the wiring. Typical repair costs on Jeep range from $150 to $3,500, depending on the specific model and root cause.
Common Causes of P0871
- •Faulty transmission fluid pressure sensor/switch C
- •Low or degraded transmission fluid
- •Internal hydraulic leak or low line pressure
- •Stuck or faulty pressure control solenoid
- •Wiring or connector issues
- •Valve body wear or contamination
- •Faulty transmission control module (less common)
P0871 on Jeep by Model
Jeep Wrangler(1 issue)
- 8HP 8-Speed Automatic Harsh/Jerky Shifting and Delayed Engagement2012-2025
Wranglers equipped with the ZF-based 8-speed automatic (845RE/850RE/8HP) are widely reported to shift harshly or jerk, especially the 1-2 shift and when accelerating from a stop, plus delayed engagement when moving from Park to Drive or Reverse. Many cases are resolved by a Transmission Control Module (TCM) software/calibration reflash, while others stem from low or degraded transmission fluid, a failing valve body, or a worn shift solenoid. NHTSA and J.D. Power survey data show higher-than-class-average shifting complaint rates. Unexpected downshifts that flare engine RPM and overheating during towing/off-road are also documented.
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View P0871 across all makes →Frequently Asked Questions
What does P0871 mean on Jeep?▼
P0871 stands for "Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance." This code sets when the transmission control module receives a signal from transmission fluid pressure sensor/switch C that is out of the expected range or implausible for the current conditions. This sensor monitors hydraulic pressure inside the transmission, which the module relies on to control clutch apply and shift quality. Symptoms can include harsh, delayed, or erratic shifts, slipping, or the transmission entering a failsafe mode. The cause is typically the sensor, actual fluid pressure problems, or the wiring. On Jeep specifically, this code is documented across 1 model.
What causes P0871 on Jeep vehicles?▼
Common causes on Jeep: Faulty transmission fluid pressure sensor/switch C, Low or degraded transmission fluid, Internal hydraulic leak or low line pressure, Stuck or faulty pressure control solenoid, Wiring or connector issues. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0871 on a Jeep?▼
Repair costs on Jeep range from $150 to $3,500, depending on the specific model and root cause.
Which Jeep models have P0871 documented?▼
Au7o has documented P0871 on 1 Jeep model: Wrangler.