P2108Throttle Actuator Control

Throttle Actuator Control Module Performance

P2108 means the throttle actuator control module is not performing within expected parameters, so the ECM cannot trust its control of the electronic throttle.

🚗 Not recommended. A throttle control module performance fault can force limp mode.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Internal ECM / throttle control module fault$300-$1500

50%

Internal module performance failure is the usual cause.

#2Poor power or ground to the ECM$50-$300

25%

Voltage problems degrade module performance.

#3Corroded ECM or throttle body connector$0-$200

15%

Corrosion disrupts control signals.

#4Software or calibration issue$100-$400

10%

Outdated calibration causes performance faults.

🩺 Common Symptoms

Reduced power / limp mode
Check engine light
Erratic throttle response
Rough idle
Stalling

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$1500

Shop Cost

$200-$1800

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P2108

1Check ECM power and ground integrity

2Inspect and clean ECM and throttle connectors

3Verify software calibration is current

4Reprogram or replace the ECM if needed, then relearn idle

❓ Frequently Asked Questions

Can I drive with a P2108 code?

Avoid it. It commonly forces limp mode and unreliable throttle response.

How much does it cost to fix P2108?

ECM replacement and programming can run $200-$1800 at a shop.

What causes P2108?

Usually an internal throttle control module fault, though power, grounds, and connectors should be checked first.

🔗 Related Codes

P2107P2100P2110P2135P2101