AutoCodes – Honda – P1121 1997 Honda Civic

P1121 1997 Honda Civic Code - Throttle Position Lower Than Expected

Quick Answer

P1121 1997 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 1997 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 2,256

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 1997 Honda Civic Description

OBDII Code P1121 1997 Honda Civic - Throttle Position Lower Than Expected - AutoCodes.com — P1121 1997 Honda Civic Code - Throttle Position Lower Than Expected

What does this mean?

What are the Possible Causes of the DTC P1121 1997 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 1997 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 1997 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 1997 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 1997 Honda Civic Code

1. What are common symptoms of OBDII code P1121 on a 1997 Honda Civic?

- Common symptoms include poor acceleration, rough idling, stalling, and the vehicle going into limp mode.

2. What can cause OBDII code P1121 on a 1997 Honda Civic?

- The code is typically triggered by a faulty throttle position sensor (TPS) or a problem with the throttle body.

3. How can I diagnose the cause of OBDII code P1121 on my 1997 Honda Civic?

- You can use an OBDII scanner to check the code and then visually inspect the throttle position sensor and throttle body for any signs of damage or malfunction.

4. Can a dirty throttle body cause OBDII code P1121 on a 1997 Honda Civic?

- Yes, a dirty throttle body can cause the throttle position sensor to receive incorrect readings, triggering the P1121 code.

5. What are some repair tips for fixing OBDII code P1121 on a 1997 Honda Civic?

- Try cleaning the throttle body and throttle position sensor first to see if that resolves the issue before considering replacing any parts.

6. Is it safe to continue driving with OBDII code P1121 on a 1997 Honda Civic?

- It is not recommended to continue driving with this code as it can lead to further damage to the engine and affect the vehicle's performance.

7. Can a faulty wiring harness cause OBDII code P1121 on a 1997 Honda Civic?

- Yes, a damaged or faulty wiring harness leading to the throttle position sensor can also trigger the P1121 code.

8. How much does it typically cost to repair OBDII code P1121 on a 1997 Honda Civic?

- The cost of repairing this code can vary depending on the underlying issue, but it may range from $100 to $500 including parts and labor.

9. Will resetting the OBDII code P1121 on a 1997 Honda Civic make it go away permanently?

- Resetting the code may temporarily remove the warning light, but if the underlying issue is not fixed, the code will likely reappear.

10. Do I need specialized tools to fix OBDII code P1121 on a 1997 Honda Civic?

- While not absolutely necessary, having an OBDII scanner and basic tools for removing and cleaning the throttle body can be helpful in diagnosing and fixing the issue.