P0871 on Chevrolet
Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance
P0871 on Chevrolet vehicles indicates transmission fluid pressure sensor/switch "c" circuit range/performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Silverado 2500HD. 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 Chevrolet range from $300 to $2,500, 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 Chevrolet by Model
Chevrolet Silverado 2500HD(1 issue)
- Allison 1000 Shift Solenoid Fault and Limp Mode (P0700 With Solenoid Sub-Code)2001-2019
Separate from the well-known torque converter shudder, the Allison 1000 in these trucks is documented for shift solenoid faults that drop the transmission into limp mode. The TCM sets P0700 - a generic 'transmission fault' pointer - accompanied by a specific solenoid code such as P0871 or P0872 (shift solenoid E stuck / on when commanded off). When that code sets, the transmission falls to hydraulic default, the TCM inhibits torque converter clutch engagement, and the truck is left in a single gear, usually third, sometimes refusing to move at all until it is restarted. On a loaded 2500HD this strands the truck. Forum diagnosis repeatedly finds the cause outside the solenoid itself: low or burnt fluid, a loose battery ground, or a chafed harness behind the transmission.
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View P0871 across all makes →Frequently Asked Questions
What does P0871 mean on Chevrolet?▼
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 Chevrolet specifically, this code is documented across 1 model.
What causes P0871 on Chevrolet vehicles?▼
Common causes on Chevrolet: 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 Chevrolet?▼
Repair costs on Chevrolet range from $300 to $2,500, depending on the specific model and root cause.
Which Chevrolet models have P0871 documented?▼
Au7o has documented P0871 on 1 Chevrolet model: Silverado 2500HD.