P1121 Code - Electric Throttle Control Actuator
Quick Answer
Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection. 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
- P1121 indicates Electric Throttle Control Actuator.
- Common causes
- Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection.
- 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 P1121 Description
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.
What are the Possible Causes of the DTC P1121?
- Faulty Electric Throttle Control Actuator
- Electric Throttle Control Actuator harness is open or shorted
- Electric Throttle Control Actuator circuit poor electrical connection
How to Fix the DTC P1121?
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 P1121 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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Information for Specific Makes
- P1121 Acura — Throttle Position Lower Than Expected
- P1121 Audi — HO2S Sensor Heater Circuit Short To Ground Bank 2 Sensor 2
- P1121 BMW — Pedal Position 1 Range/Performance Problem
- P1121 Buick — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Cadillac — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Chevrolet — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Dodge — Decreased Engine Performance Due To High Intake Air Temp
- P1121 Ford — Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121 GMC — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Honda — Throttle Position Lower Than Expected
- P1121 Hyundai — Throttle Position Input - Abnormal
- P1121 Infiniti — Electric Throttle Control Actuator
- P1121 Isuzu — Throttle Position Sensor Circuit Lower Than Expected
- P1121 KIA — Throttle Position Sensor Signal Invalid
- P1121 Land Rover — Accelerator Pedal Position Sensor Range/ Performance Problem
- P1121 Lexus — Accelerator Pedal Position Sensor Range/Performance Problem
- P1121 Lexus — Coolant Flow Control Valve Position Sensor Circuit Stuck
- P1121 Lincoln — Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121 Mazda — Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121 Mercury — Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
- P1121 MINI — Pedal Position 1 Range/Performance Problem
- P1121 Nissan — Electric Throttle Control Actuator
- P1121 Pontiac — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Saturn — Throttle Position Sensor Circuit Intermittent High Voltage
- P1121 Subaru — Neutral Position Switch Circuit
- P1121 Suzuki — Throttle Position Sensor Intermittent High Voltage
- P1121 Toyota — Accelerator Pedal Position Sensor Range/Performance Problem
- P1121 Toyota — Coolant Flow Control Valve Position Sensor Circuit Stuck
- P1121 Volkswagen — HO2S Sensor Heater Circuit Short To Ground Bank 2 Sensor 2
Frequently Asked Questions about P1121 Code
1. What are the common symptoms of OBDII code P1121 (Electric Throttle Control Actuator)?
- Common symptoms include rough idling, poor acceleration, stalling, and the vehicle going into limp mode.
2. What are the typical causes of OBDII code P1121?
- The code is often triggered by a faulty electric throttle control actuator, wiring issues, or a problem with the throttle position sensor.
3. How can I diagnose the cause of OBDII code P1121?
- To diagnose the issue, you can perform a visual inspection of the wiring, test the throttle position sensor, and use a scan tool to monitor the throttle actuator's performance.
4. Can I still drive my vehicle with OBDII code P1121 active?
- It is not recommended to drive the vehicle with this code active as it can lead to unsafe driving conditions and potential damage to the engine.
5. How can I repair OBDII code P1121 at home?
- Depending on the cause, repairs may involve replacing the electric throttle control actuator, repairing damaged wiring, or recalibrating the throttle position sensor.
6. How much does it typically cost to repair OBDII code P1121 at a mechanic?
- Repair costs can vary depending on the specific issue, but replacing the electric throttle control actuator can range from $200 to $500, including parts and labor.
7. Will resetting the OBDII code P1121 make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.
8. Can a dirty throttle body cause OBDII code P1121 to trigger?
- While a dirty throttle body can cause similar symptoms, OBDII code P1121 specifically relates to issues with the electric throttle control actuator.
9. Is it safe to continue driving if the check engine light is flashing with code P1121?
- A flashing check engine light indicates a more severe issue. It is recommended to have the vehicle inspected by a mechanic immediately to prevent further damage.
10. How long does it take to repair OBDII code P1121?
- The repair time can vary depending on the exact cause of the code and the availability of parts. In general, it may take a few hours to a full day to complete the repair.
1. What are common symptoms of OBDII code P1121 (Electric Throttle Control Actuator)?
- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.
2. What are the possible causes of OBDII code P1121?
- Possible causes include a faulty electric throttle control actuator, wiring issues, throttle position sensor problems, or a malfunctioning electronic control module.
1. What are the common symptoms associated with OBDII code P1121 (Electric Throttle Control Actuator)?
- Common symptoms include a reduction in engine power, hesitation during acceleration, and the vehicle going into limp mode.
2. What are some possible causes of OBDII code P1121?
- Possible causes include a faulty electric throttle control actuator, issues with the throttle position sensor, wiring or connector problems, or a malfunctioning electronic control unit (ECU).
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