P1790 1999 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 1999 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.
Code P1790 1999 Honda Civic Description
What are the Possible Causes of the DTC P1790 1999 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 1999 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 1999 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 1999 Honda Civic code?
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Frequently Asked Questions about P1790 1999 Honda Civic Code
1. What are the common symptoms of OBDII code P1790 in a 1999 Honda Civic?
The common symptoms of code P1790, Throttle Position Sensor Circuit Malfunction, in a 1999 Honda Civic include poor acceleration, rough idling, stalling, and the Check Engine light illuminating.
2. What usually causes the OBDII code P1790 in a 1999 Honda Civic?
The most common causes of code P1790 in a 1999 Honda Civic are a faulty throttle position sensor, damaged wiring or connectors in the throttle position sensor circuit, or a problem with the ECM (Engine Control Module).
3. How can I diagnose the Throttle Position Sensor Circuit Malfunction in my 1999 Honda Civic?
To diagnose code P1790 in your 1999 Honda Civic, you can use an OBDII scanner to read the trouble code, visually inspect the throttle position sensor and its wiring, and perform voltage tests on the sensor.
4. Can I drive my 1999 Honda Civic with OBDII code P1790?
It is not recommended to drive your 1999 Honda Civic with code P1790 as it can cause further damage to the engine and affect the car's performance. It is best to address the issue promptly.
5. How do I repair OBDII code P1790 in my 1999 Honda Civic?
To repair code P1790 in your 1999 Honda Civic, you may need to replace the throttle position sensor, repair or replace damaged wiring or connectors, or reprogram the ECM if necessary.
6. Will resetting the Check Engine light fix OBDII code P1790 in my 1999 Honda Civic?
Resetting the Check Engine light may temporarily turn it off, but it will not fix the underlying issue causing code P1790 in your 1999 Honda Civic. It is important to diagnose and repair the problem to prevent further issues.
7. How much does it typically cost to repair OBDII code P1790 in a 1999 Honda Civic?
The cost of repairing code P1790 in a 1999 Honda Civic can vary depending on the exact cause of the issue. On average, it can cost anywhere from $100 to $300 for parts and labor.
8. Can a DIY enthusiast fix OBDII code P1790 in a 1999 Honda Civic?
If you have the necessary tools, knowledge, and experience, a DIY enthusiast may be able to fix code P1790 in a 1999 Honda Civic by replacing the throttle position sensor or repairing damaged wiring. However, it is recommended to consult a professional if unsure.
9. Is it common for the Throttle Position Sensor Circuit Malfunction to recur in a 1999 Honda Civic?
If the underlying issue causing code P1790 is not properly addressed, it is possible for the Throttle Position Sensor Circuit Malfunction to recur in a 1999 Honda Civic. Ensure that the root cause is resolved to prevent future occurrences.
10. Can a malfunctioning throttle position sensor affect the fuel efficiency of a 1999 Honda Civic?
Yes, a malfunctioning throttle position sensor, as indicated by OBDII code P1790, can negatively impact the fuel efficiency of a 1999 Honda Civic by causing improper air-fuel mixture and engine performance. Addressing the issue promptly can help improve fuel efficiency.
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