AutoCodes – Honda – P1121 1996 Honda Civic

P1121 1996 Honda Civic Code - Throttle Position Lower Than Expected

Quick Answer

P1121 1996 Honda Civic indicates Throttle Position Lower Than Expected. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position Sensor 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 1996 Honda Civic indicates Throttle Position Lower Than Expected.
Common causes: Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position Sensor 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 2,356

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1121 1996 Honda Civic Description

OBDII Code P1121 1996 Honda Civic - Throttle Position Lower Than Expected - AutoCodes.com — P1121 1996 Honda Civic Code - Throttle Position Lower Than Expected

What does this mean?

What are the Possible Causes of the DTC P1121 1996 Honda Civic?

Faulty Throttle Position Sensor
Throttle Position Sensor harness is open or shorted
Throttle Position Sensor circuit poor electrical connection

How to Fix the DTC P1121 1996 Honda Civic?

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 does this mean?

Code Tech Notes

You can try to clean the throttle body but in many case the throttle body will have to be replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1121 1996 Honda Civic 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.

Need more information about the P1121 1996 Honda Civic code?

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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 1996 Honda Civic Code

1. What are the common symptoms of OBDII code P1121 on a 1996 Honda Civic?

- Common symptoms include rough idling, poor acceleration, stalling, and the Check Engine light turning on.

2. What does the OBDII code P1121 on a 1996 Honda Civic indicate?

- OBDII code P1121 indicates that the throttle position is lower than expected by the Engine Control Module (ECM).

3. What are the possible causes of OBDII code P1121 on a 1996 Honda Civic?

- Possible causes include a faulty throttle position sensor, a dirty throttle body, a vacuum leak, or a problem with the wiring or connectors related to the throttle position sensor.

4. How can I diagnose the OBDII code P1121 on a 1996 Honda Civic?

- Diagnosis typically involves checking the throttle position sensor's voltage output, inspecting the throttle body for dirt or carbon buildup, and scanning for any other related trouble codes.

5. How can I repair OBDII code P1121 on a 1996 Honda Civic?

- Repair may involve cleaning the throttle body, replacing the throttle position sensor, fixing any vacuum leaks, or repairing damaged wiring or connectors.

6. Can I still drive my 1996 Honda Civic with OBDII code P1121?

- It is not recommended to drive the vehicle with OBDII code P1121 as it can cause drivability issues and potentially lead to further engine damage.

7. Will resetting the Check Engine light fix OBDII code P1121 on a 1996 Honda Civic?

- Simply resetting the Check Engine light will not fix the underlying issue causing OBDII code P1121. The root cause needs to be diagnosed and repaired.

8. How much does it typically cost to repair OBDII code P1121 on a 1996 Honda Civic?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. How urgent is it to address OBDII code P1121 on a 1996 Honda Civic?

- It is recommended to address OBDII code P1121 promptly to prevent further damage to the engine and ensure the vehicle operates correctly.

10. Can a DIY enthusiast fix OBDII code P1121 on a 1996 Honda Civic?

- Depending on the DIY skills and tools available, it may be possible to address some of the common causes of OBDII code P1121, such as cleaning the throttle body or replacing the throttle position sensor.