AutoCodes – Acura – P1790 Acura

P1790 Acura 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 Acura 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 2,710

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 Acura 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 Acura - Throttle Position Sensor Circuit Malfunction - AutoCodes.com — P1790 Acura Code - Throttle Position Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1790 Acura?

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 Acura?

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 Acura 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 Acura 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 Acura Code

1. What does the OBDII code P1790 mean for an Acura?

P1790 indicates a throttle position sensor (TPS) circuit malfunction, meaning the engine control module (ECM) is detecting an issue with the TPS signal.

2. What are the common symptoms of code P1790 on an Acura?

Common symptoms include poor acceleration, rough idling, hesitation during acceleration, reduced fuel efficiency, and possible activation of the check engine light.

3. What causes the P1790 code on an Acura?

Causes may include a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning ECM, or carbon buildup affecting the throttle body.

4. Can I drive my Acura with the P1790 code?

Driving with the P1790 code is possible but not recommended, as it can lead to reduced performance, potential stalling, and unsafe driving conditions.

5. How do I diagnose the P1790 code on my Acura?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the TPS and its wiring for damage, and checking the throttle body for debris or carbon buildup.

6. How can I fix the P1790 code on my Acura?

Repairs may include replacing the throttle position sensor, cleaning or replacing the throttle body, repairing damaged wiring, or reprogramming the ECM if needed.

7. How much does it cost to fix the P1790 code on an Acura?

The cost varies depending on the repair, but replacing the throttle position sensor typically costs between $100 and $300, including parts and labor.

8. Will clearing the P1790 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be fixed to prevent the code from returning.

9. Can a dirty throttle body cause the P1790 code on an Acura?

Yes, a dirty or clogged throttle body can cause inaccurate throttle position readings, leading to the P1790 code.

10. Do I need to replace the ECM for the P1790 code on an Acura?

Replacing the ECM is rarely needed and should only be considered after ruling out all other potential causes, such as the throttle position sensor and wiring.