P2118 Lexus Code - Throttle Actuator Control Motor Current Range / Performance
Quick Answer
The Electronic Throttle Control System (ETCS) has a dedicated power supply circuit. Common causes include Electronic Throttle Control System (ETCS) Fuse, Faulty Battery, Loose or damaged battery terminals. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2118 Lexus indicates Throttle Actuator Control Motor Current Range / Performance.
- Common causes
- Common causes include Electronic Throttle Control System (ETCS) Fuse, Faulty Battery, Loose or damaged battery terminals.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P2118 Lexus Description
The ECM monitors the battery supply voltage applied to the throttle actuator. When the power supply voltage (+BM) is less than 4 V for 0.8 seconds or more, the ECM interprets this as an open in the power supply circuit (+BM). The ECM illuminates the MIL and stores the Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P2118 Lexus?
- Electronic Throttle Control System (ETCS) Fuse
- Faulty Battery
- Loose or damaged battery terminals
- Faulty Throttle with Motor Body Assembly
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2118 Lexus?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2118 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P2118 Lexus Code
1. What does the OBDII code P2118 mean on a Lexus?
P2118 indicates a problem with the Throttle Actuator Control Motor Current Range/Performance, meaning the throttle actuator motor isn't functioning as expected.
2. What are the common symptoms of code P2118 on a Lexus?
Common symptoms include reduced engine performance, the vehicle entering limp mode, poor throttle response, and an illuminated check engine light.
3. What causes the P2118 code on a Lexus?
Possible causes include a faulty throttle actuator motor, wiring or connector issues, a malfunctioning throttle position sensor, or a problem with the vehicle’s ECM.
4. Can I drive my Lexus with a P2118 code?
Driving with a P2118 code is not recommended, as the vehicle may experience reduced performance, enter limp mode, or potentially stall, creating safety risks.
5. How do I fix the P2118 code on my Lexus?
Repairs may involve inspecting and repairing wiring or connectors, cleaning the throttle body, replacing the throttle actuator motor, or reprogramming/updating the ECM.
6. How much does it cost to fix the P2118 code on a Lexus?
Repair costs vary, but fixing the issue could range from $100 for cleaning the throttle body to $500 or more for replacing the throttle actuator or ECM.
7. Can a dirty throttle body cause the P2118 code on a Lexus?
Yes, a dirty or carbon-clogged throttle body can restrict movement and cause the throttle actuator motor to work improperly, triggering the P2118 code.
8. How is the P2118 code diagnosed on a Lexus?
A technician will use a scan tool to check for related codes, inspect the throttle body and actuator, test the wiring and connectors, and verify the ECM’s functionality.
9. Does the P2118 code mean the throttle actuator motor is bad?
Not necessarily. The issue could also stem from wiring problems, a dirty throttle body, or a malfunctioning ECM. Proper diagnosis is essential.
10. Can a software update fix the P2118 code on a Lexus?
In some cases, a software update for the ECM may resolve the issue if the problem is related to control logic rather than hardware.
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