P1121
Electric Throttle Control Actuator
P1121 is an OBD-II diagnostic trouble code meaning: Electric Throttle Control Actuator. Common causes: throttle actuator malfunction, open or short circuit in control circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- The engine goes into emergency mode
- Loss of engine power
- Unstable idle speed
- Dips when pressing the gas pedal
Causes
- Throttle actuator malfunction
- Open or short circuit in control circuit
- Poor contact in connectors
- Problems with power or circuit ground
- Engine ECU malfunction
How to Fix
- Check the condition of connectors and wiring
- Check the resistance and operation of the throttle valve actuator
- Check voltage and continuity of control circuit
- Scan the ECU for additional errors
- If necessary, replace the throttle assembly
Related codes
Error P1121 by Vehicle Brand
FAQ
What does the P1121 code mean?
P1121 is an OBD-II diagnostic trouble code that indicates: Electric Throttle Control Actuator
What causes a P1121 error code?
The most common causes of P1121 include: Throttle actuator malfunction; Open or short circuit in control circuit; Poor contact in connectors; Problems with power or circuit ground.
How do I fix a P1121 diagnostic trouble code?
To fix P1121: Check the condition of connectors and wiring. Check the resistance and operation of the throttle valve actuator. Check voltage and continuity of control circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1121?
Limited driving only, diagnose soon
How much does it cost to fix P1121?
The estimated repair cost for P1121 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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