P0873Transmission

Transmission Fluid Pressure Sensor C Circuit High

P0873 means the transmission fluid pressure sensor or switch C circuit is reading high, often an open circuit, a short to power, or a failed sensor. The controller loses accurate pressure feedback from that circuit.

🚗 Limited. A bad pressure sensor signal can cause erratic shifting or limp mode.
MEDIUM
severity
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🎯 Top Causes, Ranked by Likelihood

#1Faulty transmission pressure sensor C$100-$350
35%
A failed sensor outputs high voltage.
#2Open or high-resistance wiring$100-$300
30%
An open signal or ground wire raises the reading.
#3Short to power in wiring$100-$300
20%
A wire touching voltage pulls the circuit high.
#4Poor connector or corrosion$20-$100
15%
A corroded connector produces a high reading.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$20-$350
Shop Cost
$100-$450

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P0873

1Check fluid level and condition first
2Inspect the pressure sensor C connector and wiring
3Check the ground circuit for an open
4Replace the transmission pressure sensor if faulty

❓ Frequently Asked Questions

Can I drive with P0873?
Only briefly. Loss of pressure feedback can cause erratic shifting or limp mode. Diagnose it soon.
What does P0873 mean?
The transmission fluid pressure sensor C circuit reads high, usually an open circuit, a short to power, or a bad sensor.
How much to fix P0873?
A replacement sensor is $100-$350, and wiring repairs run $100-$300.

🔗 Related Codes

P0872P0842P0843P0847P0731
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