AutoCodes – Honda – P1790 1998 Honda Civic

P1790 1998 Honda Civic Code - Throttle Position Sensor Circuit Malfunction

Quick Answer

The Engine Control Module (ECM) monitors the Throttle Position (TP) Sensor. Common causes include Faulty Throttle Position (TP) 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: P1790 1998 Honda Civic indicates Throttle Position Sensor Circuit Malfunction.
Common causes: Common causes include Faulty Throttle Position (TP) 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 2,259

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1790 1998 Honda Civic Description

The Engine Control Module (ECM) monitors the Throttle Position (TP) Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Throttle Position (TP) Sensor is not to factory specifications.

OBDII Code P1790 1998 Honda Civic - Throttle Position Sensor Circuit Malfunction - AutoCodes.com — P1790 1998 Honda Civic Code - Throttle Position Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1790 1998 Honda Civic?

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

How to Fix the DTC P1790 1998 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1790 1998 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 P1790 1998 Honda Civic code?

Need more information on how to fix the P1790 1998 Honda Civic code? Get Access to Factory Service Manuals

Need Help with the 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 P1790 1998 Honda Civic Code

1. What are the common symptoms of OBDII code P1790 in a 1998 Honda Civic?

- Common symptoms include erratic engine idling, stalling, poor acceleration, and potential difficulty shifting gears.

2. What does the OBDII code P1790 indicate in a 1998 Honda Civic?

- OBDII code P1790 indicates a Throttle Position Sensor Circuit Malfunction in the vehicle's engine control system.

3. What are the possible causes of OBDII code P1790 in a 1998 Honda Civic?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the circuit, or issues with the engine control module.

4. How can I diagnose the Throttle Position Sensor Circuit Malfunction in my 1998 Honda Civic?

- You can diagnose the issue by using an OBDII scanner to retrieve the specific error code, inspecting the throttle position sensor and its wiring for damage, and testing the sensor's voltage output.

5. Can I drive my 1998 Honda Civic with OBDII code P1790?

- It is not recommended to drive your vehicle with OBDII code P1790 as it can lead to poor engine performance and potential safety hazards. It's best to address the issue promptly.

6. Is it possible to repair OBDII code P1790 in a 1998 Honda Civic myself?

- Repairing OBDII code P1790 may require technical knowledge and experience. It's recommended to consult a professional mechanic for proper diagnosis and repair.

7. How much does it typically cost to fix OBDII code P1790 in a 1998 Honda Civic?

- The cost to fix OBDII code P1790 can vary depending on the extent of the issue and whether you choose to replace the throttle position sensor yourself or have a mechanic do the repair. Costs can range from $100 to $300 or more.

8. Can resetting the check engine light resolve OBDII code P1790 in a 1998 Honda Civic?

- Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing OBDII code P1790. It's important to address the root cause of the problem.

9. Will OBDII code P1790 cause my 1998 Honda Civic to fail an emissions test?

- Yes, OBDII code P1790 can cause your vehicle to fail an emissions test due to its impact on engine performance and emissions output.

10. How long can I safely drive my 1998 Honda Civic with OBDII code P1790 before getting it repaired?

- It is best to address OBDII code P1790 as soon as possible to prevent further damage to your vehicle and ensure optimal engine performance. Driving with this code for an extended period is not recommended.