What Does P2118 Mean?
The powertrain control module (PCM) has detected that the electric motor controlling the throttle plate is drawing abnormal current or not performing as expected. This indicates a problem with the electronic throttle control system's actuator motor circuit.
Safety Warning
Vehicle may enter reduced power mode (limp mode), experience sudden loss of throttle response, or have unpredictable acceleration. Unsafe to drive normally; seek immediate repair.
Common Causes
45%
Faulty throttle body motor or internal motor winding damage
25%
Carbon buildup or mechanical binding in throttle body preventing smooth motor operation
20%
Damaged wiring or connector corrosion in throttle actuator motor circuit
10%
PCM internal driver circuit failure
Diagnostic Steps
1
Step 1: Inspect throttle body for carbon buildup, binding, or physical damage; check throttle plate movement by hand (key off)
2
Step 2: Monitor throttle actuator motor current draw using bidirectional scan tool controls while commanding throttle positions
3
Step 3: Check throttle body connector for corrosion, damaged pins, or moisture; inspect wiring harness for damage
4
Step 4: Measure resistance of throttle motor windings according to manufacturer specifications
5
Step 5: If all checks pass, test PCM output signals and consider PCM driver circuit fault
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The powertrain control module (PCM) has detected that the electric motor controlling the throttle plate is drawing abnormal current or not performing as expected. This indicates a problem with the electronic throttle control system's actuator motor circuit.
The most common cause of P2118 (Throttle Actuator Control Motor Current Range/Performance) is: Faulty throttle body motor or internal motor winding damage
Typical repair costs for P2118 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter reduced power mode (limp mode), experience sudden loss of throttle response, or have unpredictable acceleration. Unsafe to drive normally; seek immediate repair.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2118 to identify the root cause.
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Quick Info
Category
Powertrain
System
Electronic Throttle Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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