P0871 — Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance

What Does P0871 Mean?

P0871 is a diagnostic trouble code indicating: Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0871

⚠️ Check Engine Light (MIL) illuminated
⚠️ Transmission Fluid Pressure Sensor/Switch C not operating within expected parameters
⚠️ Reduced efficiency or performance of related system
⚠️ Harsh or delayed shifting

Common Causes

🔍 Transmission Fluid Pressure Sensor/Switch C degraded or contaminated
🔍 Mechanical wear or binding in Transmission Fluid Pressure Sensor/Switch C
🔍 Incorrect Transmission Fluid Pressure Sensor/Switch C installed (wrong part number)
🔍 Related system mechanical issue affecting Transmission Fluid Pressure Sensor/Switch C readings

Frequently Asked Questions

What does P0871 mean?

P0871 indicates: Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance. The vehicle's computer has detected that the Transmission Fluid Pressure Sensor/Switch C is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0871?

Only short distances if absolutely necessary. P0871 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P0871?

Repair costs for P0871 typically range from $50 to $500, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and clean Transmission Fluid Pressure Sensor/Switch C
🔧 Replace degraded Transmission Fluid Pressure Sensor/Switch C
🔧 Check for related mechanical issues affecting readings

1
Find your vehicle above
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2
Check for recalls
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0871: Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance