AutoCodes – Nissan – P1121 2004 Nissan Altima Sedan

P1121 2004 Nissan Altima Sedan 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 2004 Nissan Altima Sedan 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.

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Code Popularity 4,480

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 25, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1121 2004 Nissan Altima Sedan Description

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.
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.

OBDII Code P1121 2004 Nissan Altima Sedan - Electric Throttle Control Actuator - AutoCodes.com — P1121 2004 Nissan Altima Sedan Code - Electric Throttle Control Actuator

What does this mean?

What are the Possible Causes of the DTC P1121 2004 Nissan Altima Sedan?

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 2004 Nissan Altima Sedan?

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 2004 Nissan Altima Sedan 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1121 2004 Nissan Altima Sedan Code

1. What does the OBDII code P1121 mean for a 2004 Nissan Altima Sedan?

P1121 refers to the Electric Throttle Control Actuator, indicating a problem with the throttle control system's operation.

2. What are the symptoms of the P1121 code in a 2004 Nissan Altima?

Common symptoms include poor acceleration, engine stalling, reduced power, difficulty starting, and the Check Engine Light being illuminated.

3. What causes the P1121 code to appear?

Causes can include a faulty throttle body, damaged throttle position sensors, wiring issues, or a malfunctioning throttle control motor.

4. Can I drive my 2004 Nissan Altima with the P1121 code?

Driving with this code is not recommended as it can lead to unpredictable engine performance and potential safety concerns.

5. How do I diagnose the P1121 code in a 2004 Nissan Altima?

Diagnosis involves scanning for OBDII codes, inspecting the throttle body, checking the throttle position sensors, and testing the wiring and connections for continuity.

6. How is the P1121 code fixed on a 2004 Nissan Altima?

Repairs may involve cleaning or replacing the throttle body, repairing damaged wiring, or replacing the throttle position sensors or throttle control motor.

7. How much does it cost to repair a P1121 code in a 2004 Nissan Altima?

The repair cost varies but typically ranges from $150 to $500 depending on whether the throttle body or sensors need replacement.

8. Can a dirty throttle body cause the P1121 code in a 2004 Nissan Altima?

Yes, a dirty or clogged throttle body can restrict airflow and trigger the P1121 code.

9. Will resetting the ECU clear the P1121 code?

Resetting the ECU may temporarily clear the code, but the underlying issue must be resolved to prevent it from returning.

10. Can I fix the P1121 code myself on a 2004 Nissan Altima?

If you have basic automotive repair skills, you might be able to clean the throttle body or check wiring, but more complex repairs may require professional assistance.