P2100Throttle Actuator Control

Throttle Actuator Control Motor Circuit / Open

P2100 means the ECM detected an open or failed circuit in the throttle actuator control motor, so it cannot command the electronic throttle plate to move as intended.

🚗 Not recommended. This code often disables the electronic throttle and forces limp mode.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed throttle actuator control motor / throttle body$150-$600

45%

The internal DC motor that moves the throttle plate is worn or open.

#2Wiring or connector fault to the throttle body$50-$300

30%

Open, corroded, or chafed motor control wiring breaks the circuit.

#3ECM throttle driver fault$200-$1200

15%

The internal ECM driver that powers the motor has failed.

#4Blown fuse feeding the throttle actuator$5-$50

10%

A failed fuse removes power to the throttle motor circuit.

🩺 Common Symptoms

Reduced power / limp mode
Check engine light
Unresponsive throttle
Rough or high idle
Possible stalling

💰 Repair Cost: DIY vs Shop

DIY Cost

$60-$600

Shop Cost

$200-$900

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P2100

1Scan for related throttle codes and check the throttle actuator fuse

2Inspect the throttle body connector and wiring for open circuits

3Test motor resistance and control circuit continuity

4Replace the throttle body if the motor is open, then relearn idle

❓ Frequently Asked Questions

Can I drive with a P2100 code?

Avoid it. P2100 usually forces limp mode with very limited power, which is unsafe in traffic.

How much does it cost to fix P2100?

A throttle body replacement typically runs $200-$900 at a shop, or $60-$600 in parts for DIY.

Will P2100 cause limp mode?

Yes. When the throttle motor circuit fails, the ECM commonly forces reduced-power limp mode.

🔗 Related Codes

P2101P2102P2103P2110P2135