P0228Fuel & Air

Throttle/Pedal Position Sensor C Circuit High

P0228 means the PCM detected throttle or pedal position sensor C circuit is reading high voltage, often a failed sensor, a short to power, or an open ground.

🚗 Limited. A high third throttle signal can cause reduced power or limp mode.
MEDIUM
severity
Is P0228 really the problem on YOUR car?
Get a free AI diagnosis ranked by probability for your exact year, make, and model.
Run Free Diagnosis →

🎯 Top Causes, Ranked by Likelihood

#1Faulty throttle position sensor C$100-$350
35%
A failed sensor outputs high voltage.
#2Short to power in signal wiring$100-$250
30%
A wire touching voltage pulls the circuit high.
#3Open ground circuit$100-$250
20%
A missing ground raises the sensor reading.
#4Poor connector contact$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 P0228

1Inspect the sensor C connector and wiring
2Check the ground circuit for an open
3Measure the sensor C signal voltage
4Replace the sensor or assembly if faulty

❓ Frequently Asked Questions

Can I drive with P0228?
Only carefully. A throttle sensor fault can trigger limp mode. Repair it soon.
What does P0228 mean?
The throttle or pedal position sensor C circuit reads high voltage, usually a bad sensor, short to power, or open ground.
How much to fix P0228?
A replacement sensor is $100-$350, and wiring repairs run $100-$250.

🔗 Related Codes

P0225P0226P0227P0223P0123
Don't guess. Know exactly what's wrong.
AmpAuto's AI ranks the real causes for your specific vehicle in 30 seconds.
Diagnose P0228 Free →