AutoCodes – Honda – P1790 1997 Honda Civic

P1790 1997 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 1997 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 2,644

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 1997 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 1997 Honda Civic - Throttle Position Sensor Circuit Malfunction - AutoCodes.com — P1790 1997 Honda Civic Code - Throttle Position Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1790 1997 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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1790 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 P1790 1997 Honda Civic code?

Need more information on how to fix the P1790 1997 Honda Civic code? Get Access to Factory Service Manuals

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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 1997 Honda Civic Code

1. What are the common symptoms of OBDII code P1790 in a 1997 Honda Civic?

- Common symptoms include erratic idle speed, stalling, poor acceleration, and potential issues with the vehicle's transmission shifting.

2. What causes the Throttle Position Sensor Circuit Malfunction in a 1997 Honda Civic?

- The P1790 code is often triggered by a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's calibration.

3. How can I diagnose the Throttle Position Sensor Circuit Malfunction in my 1997 Honda Civic?

- Diagnosing the issue involves using an OBDII scanner to retrieve the trouble code, checking the throttle position sensor's voltage readings, and inspecting the sensor's wiring and connections for any damage.

4. Can I drive my 1997 Honda Civic with the P1790 code present?

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

5. What are the repair options for fixing the Throttle Position Sensor Circuit Malfunction in a 1997 Honda Civic?

- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, and resetting the sensor's calibration using a professional diagnostic tool.

6. Is it possible to reset the P1790 code in a 1997 Honda Civic without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is not recommended to do so without addressing the root cause, as the problem may persist and lead to further issues down the line.

7. How much does it typically cost to repair the Throttle Position Sensor Circuit Malfunction in a 1997 Honda Civic?

- The cost of repair can vary depending on the extent of the issue and whether you choose to do the repair yourself or take the vehicle to a mechanic. Generally, replacing the throttle position sensor can cost around $100 to $200.

8. Are there any preventative measures I can take to avoid the P1790 code in my 1997 Honda Civic?

- Regular maintenance, such as keeping the throttle position sensor clean and checking the sensor's wiring for any signs of wear, can help prevent issues that may trigger the P1790 code.

9. Will the P1790 code cause my 1997 Honda Civic to fail an emissions test?

- Yes, the P1790 code can cause your vehicle to fail an emissions test due to the impact it has on engine performance and emissions control systems.

10. How long does it typically take to repair the Throttle Position Sensor Circuit Malfunction in a 1997 Honda Civic?

- The repair process can take anywhere from 1 to 3 hours, depending on the extent of the issue, your experience with automotive repairs, and the availability of necessary parts and tools.