P2118 — Throttle Actuator Control Motor Current Range/Performance

Will P2118 clear itself?

Sometimes P2118 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

How much does it cost to fix P2118?

Replace the MAF or MAP sensor — $150–$400; Clean the throttle body — $80–$200; Replace the throttle body assembly — $250–$700. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code P2118 mean?

Throttle Actuator Control Motor Current Range/Performance (P2118): a powertrain (engine/transmission) fault affecting the throttle and intake air metering. Short, gentle driving to a shop is usually possible. Most often caused by failed electronic throttle motor, wiring or connector faults in the throttle circuit, dirty throttle body or stuck throttle plate.

Is it safe to drive with P2118?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

What is the most common cause of P2118?

The most common causes are: failed electronic throttle motor, wiring or connector faults in the throttle circuit, dirty throttle body or stuck throttle plate.

What does P2118 mean?

Seeing P2118 on your scanner? The control unit has caught the throttle and intake air metering operating outside its calibrated window. The formal description is “Throttle Actuator Control Motor Current Range/Performance”, and the code is grouped under powertrain (engine/transmission) faults.

“Range/performance” means the signal from the throttle actuator control motor current is electrically valid but does not match what the module expects for current operating conditions. The wiring is usually intact; the problem is a degraded component, a drifted sensor or a mechanical fault upstream.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2118 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes P2118?

• degraded or drifting throttle actuator control motor current
• mechanical fault that the sensor correctly reports
• incorrect calibration after a module update or battery disconnect
• contaminated or failed MAF/MAP sensor
• wiring or connector faults in the throttle circuit
• failed electronic throttle motor
• dirty throttle body or stuck throttle plate
• faulty throttle position sensor or pedal sensor

Common symptoms of P2118

• stalling when coming to a stop
• unstable or high idle
• limp-home mode with reduced power
• poor throttle response
• Check Engine Light on

How to diagnose P2118

1. Connect an OBD2 scanner, confirm P2118 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
3. Visually inspect the wiring harness and connectors related to the throttle and intake air metering for damage, corrosion, chafing or poor contact.
4. Compare the throttle actuator control motor current live reading against a known-good reference (specification or a correlated sensor) under the conditions from the freeze frame.
5. Inspect and clean the throttle body; check that the plate moves freely.
6. Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2118 does not return.

How to fix P2118

Start with the cheapest and most common causes before replacing expensive parts:

• Replace the MAF or MAP sensor — $150–$400
• Clean the throttle body — $80–$200
• Replace the throttle body assembly — $250–$700

How much does it cost to fix P2118?

Repair cost depends on which component actually failed. Typical scenarios for P2118 (parts and labor, USD, independent shop rates):

• Replace the MAF or MAP sensor: $150–$400
• Clean the throttle body: $80–$200
• Replace the throttle body assembly: $250–$700

Overall, fixing P2118 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2118?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

Related OBD2 codes

• P2100: Throttle Actuator "A" Control Motor Circuit/Open
• P2101: Throttle Actuator "A" Control Motor Circuit Range/Performance
• P2102: Throttle Actuator "A" Control Motor Circuit Low
• P2103: Throttle Actuator "A" Control Motor Circuit High
• P2104: Throttle Actuator Control System - Forced Idle
• P2105: Throttle Actuator Control System - Forced Engine Shutdown