P1790 Honda Code - Throttle Position Sensor Circuit Malfunction
Quick Answer
The P1790 Honda code indicates a Throttle Position Sensor (TPS) Circuit Malfunction. Common causes include Faulty TPS sensor, Loose or damaged wiring/connectors in the TPS circuit, Corrosion on TPS sensor terminals. 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 Honda indicates Throttle Position Sensor Circuit Malfunction.
- Common causes
- Common causes include Faulty TPS sensor, Loose or damaged wiring/connectors in the TPS circuit, Corrosion on TPS sensor terminals.
- 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 P1790 Honda Description
The P1790 Honda code indicates a Throttle Position Sensor (TPS) Circuit Malfunction. The TPS is a sensor that monitors the position of the throttle valve and sends this information to the engine control module (ECM). This data is crucial for the ECM to adjust fuel injection, ignition timing, and other engine functions to optimize performance and fuel efficiency. A malfunctioning TPS can lead to incorrect readings being sent to the ECM, resulting in poor engine performance, rough idling, stalling, and decreased fuel efficiency. If not addressed, this issue can potentially cause further damage to other engine components and lead to more costly repairs down the line.
Common Causes of P1790 Honda
- Faulty TPS sensor
- Loose or damaged wiring/connectors in the TPS circuit
- Corrosion on TPS sensor terminals
- Issues with the ECM
- Mechanical issues affecting the throttle valve
Symptoms of P1790 Honda
- Rough idling or stalling
- Poor acceleration or hesitation when pressing the gas pedal
- Sudden changes in engine speed
- Check Engine Light illuminated on the dashboard
- Reduced fuel efficiency
How to Fix P1790 Honda
- Diagnose the issue by using a scan tool to verify the P1790 code and checking the TPS sensor's voltage readings.
- Inspect the TPS wiring and connectors for any damage or corrosion.
- Replace the TPS sensor if it is found to be faulty.
- Clear the error code from the ECM and perform a test drive to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be required to pinpoint the exact cause.
Cost to Fix P1790 Honda
The typical cost for repairing a Throttle Position Sensor Circuit Malfunction can range from $150 to $300, including parts and labor. However, it's important to note that prices can vary depending on the specific make and model of the vehicle, as well as the location and type of repair shop. Additional costs may apply if other components need to be replaced or if further diagnostics are necessary. It's recommended to obtain quotes from multiple auto repair shops to compare prices and ensure a fair estimate.
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Information for Specific Honda Models
- P1790 1996 Honda Civic — Throttle Position Sensor Circuit Malfunction
- P1790 1997 Honda Civic — Throttle Position Sensor Circuit Malfunction
- P1790 1998 Honda Civic — Throttle Position Sensor Circuit Malfunction
- P1790 1999 Honda Civic — Throttle Position Sensor Circuit Malfunction
- P1790 2000 Honda Civic — Throttle Position Sensor Circuit Malfunction
Frequently Asked Questions about P1790 Honda Code
1. What are the common symptoms of OBDII code P1790 on a Honda related to Throttle Position Sensor Circuit Malfunction?
- Common symptoms include poor engine performance, rough idling, stalling, and difficulty accelerating.
2. What are the possible causes of the Throttle Position Sensor Circuit Malfunction in a Honda triggering code P1790?
- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a problem with the throttle body assembly.
3. How can I diagnose the Throttle Position Sensor Circuit Malfunction causing OBDII code P1790 on my Honda?
- Diagnose the issue by performing a visual inspection of the TPS wiring, testing the throttle position sensor with a multimeter, and checking for any loose connections or corrosion.
4. Can driving with the OBDII code P1790 related to Throttle Position Sensor Circuit Malfunction harm my Honda?
- Continuing to drive with this issue can potentially lead to poor fuel economy, further engine damage, and eventual stalling or loss of power while driving.
5. What are some repair tips for fixing the Throttle Position Sensor Circuit Malfunction in a Honda triggering code P1790?
- Repair tips include replacing the faulty throttle position sensor, repairing or replacing damaged wiring, cleaning connectors, and ensuring proper installation of components.
6. Is it safe to reset the OBDII code P1790 related to Throttle Position Sensor Circuit Malfunction in my Honda without fixing the underlying issue?
- While you can reset the code, it is not recommended as the problem will persist, potentially leading to further issues and impacting the vehicle's performance.
7. How can I prevent the recurrence of OBDII code P1790 in my Honda due to Throttle Position Sensor Circuit Malfunction?
- Regularly inspect and maintain the throttle position sensor, wiring, and connectors, follow proper driving habits, and address any engine performance issues promptly.
8. Can a DIY enthusiast repair the Throttle Position Sensor Circuit Malfunction causing code P1790 in a Honda?
- Depending on the DIY enthusiast's skill level and access to tools, repairing this issue may be possible by following detailed repair guides and being cautious with electrical components.
9. Will replacing the throttle position sensor resolve the OBDII code P1790 issue in my Honda?
- In many cases, replacing the throttle position sensor can effectively resolve the Throttle Position Sensor Circuit Malfunction triggering code P1790, restoring proper engine performance.
10. How long does it typically take to repair the Throttle Position Sensor Circuit Malfunction causing OBDII code P1790 in a Honda?
- The repair time can vary based on experience level and access to tools but typically ranges from 1-3 hours for DIY repairs or longer if seeking professional assistance.
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