P2127Throttle Actuator Control

Pedal Position Sensor / Switch E Circuit Low Input

P2127 means the accelerator pedal position sensor E circuit read voltage below the expected range, indicating a short to ground or an open in that second sensor circuit.

🚗 Not recommended. A low pedal signal can force limp mode.
HIGH
severity
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🎯 Top Causes, Ranked by Likelihood

#1Failed accelerator pedal position sensor$100-$400
45%
A shorted or open sensor E element reads low.
#2Wiring shorted to ground or open$50-$300
30%
A short to ground or broken wire pulls the signal low.
#3Corroded pedal connector$0-$150
15%
Corrosion causes a low or lost signal.
#4Poor 5V reference or ground$50-$300
10%
A missing reference drops the sensor voltage.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$60-$400
Shop Cost
$150-$600

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P2127

1Read live data for pedal sensor E circuit
2Inspect the pedal connector and wiring for shorts to ground
3Test the 5V reference and ground
4Replace the pedal position sensor if the signal stays low

❓ Frequently Asked Questions

Can I drive with a P2127 code?
Avoid it. A low pedal signal commonly forces limp mode with reduced power.
How much does it cost to fix P2127?
A pedal position sensor replacement typically runs $150-$600 at a shop.
What causes P2127?
Usually a failed pedal sensor or a wire shorted to ground in the E circuit.

🔗 Related Codes

P2128P2122P2123P2138P2135
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