P0871 on Jeep: How to Diagnose & Fix
Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance
1 Jeep model · 1 documented issue · $150-$3,500 repair
P0871 on Jeep by model: symptoms, diagnosis and fix
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.
Common Symptoms
- Harsh or jerky 1-2 shift
- Clunk from Park to Drive/Reverse
- Delayed engagement
- Unexpected downshifts / RPM flare
- Hesitation during acceleration
- Transmission overheat warning when towing
How to Fix
Start with the latest TCM/PCM calibration flash from the dealer (many harsh-shift complaints are a software fix). Verify transmission fluid level and condition using the correct fill procedure and ZF-spec fluid; perform a fluid/filter service if dark or burnt. If shifting faults persist, diagnose the valve body and shift solenoids; relearn shift adaptives after any service. Severe internal failures require valve body or transmission replacement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 68218925AB ZF 8 & 9 Speed automatic-transmission fluid, one quartOEMMopar 68218925AB
Confirm the exact transmission service specification and quantity; not a universal-ATF substitute and not a standalone cure for software or intern
- Genuine Mopar 68362041AC Wrangler transmission oil panOEMMopar 68362041AC
Select by VIN and transmission code; the page's broad engi
- Genuine Mopar 68417054AB transmission-oil filterOEMMopar 68417054AB
Separate filter branch for a VIN-confirmed non-PHEV JL eight-speed pan-drop service Fitment/availability: Shown with the 68362041AC metal-pan family in Mopar diagrams. Confirm transmission, engine and VIN; do not apply automatically to t…
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Sources for this issue (2)
P0871 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 P0871 mean on a 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 it is documented across 1 model: Wrangler.
What are the most common causes of P0871?
The most common causes of P0871 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0871 on a Jeep?
Published repair estimates on Jeep range from $150 to $3,500 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 P0871 on a different make?
View P0871 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.