AutoCodes – Isuzu – P1794 Isuzu

P1794 Isuzu Code - Automatic Transmission BARO Signal

Quick Answer

P1794 Isuzu indicates Automatic Transmission BARO Signal. Common causes include Faulty Transmission Control Module (TCM), Faulty Engine Control Module (ECM), Transmission Control Module (TCM) harness is open or shorted. 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: P1794 Isuzu indicates Automatic Transmission BARO Signal.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Faulty Engine Control Module (ECM), Transmission Control Module (TCM) harness is open or shorted.
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 2,759

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 Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1794 Isuzu Description

OBDII Code P1794 Isuzu - Automatic Transmission BARO Signal - AutoCodes.com — P1794 Isuzu Code - Automatic Transmission BARO Signal

What does this mean?

What are the Possible Causes of the DTC P1794 Isuzu?

Faulty Transmission Control Module (TCM)
Faulty Engine Control Module (ECM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC P1794 Isuzu?

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 P1794 Isuzu 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 P1794 Isuzu 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 P1794 Isuzu Code

1. What are the common symptoms of OBDII code P1794 in an Isuzu related to the Automatic Transmission BARO Signal?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P1794 Isuzu indicate about the Automatic Transmission BARO Signal?

- This code indicates a malfunction in the automatic transmission related to the BARO (barometric pressure) signal.

3. What are the possible causes of OBDII code P1794 in an Isuzu's automatic transmission?

- Possible causes include a faulty barometric pressure sensor, wiring issues, poor electrical connections, or a damaged transmission control module.

4. How can I diagnose the OBDII code P1794 in my Isuzu's automatic transmission?

- Diagnose this code using a scan tool to read the code, inspecting the barometric pressure sensor and related wiring, and checking the transmission control module for faults.

5. Can I continue driving my Isuzu with OBDII code P1794 related to the Automatic Transmission BARO Signal?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the transmission and potentially cause unsafe driving conditions.

6. How can I repair OBDII code P1794 in my Isuzu's automatic transmission?

- Repair options include replacing the faulty barometric pressure sensor, repairing damaged wiring or connections, or reprogramming/resetting the transmission control module.

7. Is it possible to clear the OBDII code P1794 in an Isuzu without fixing the issue?

- Clearing the code without addressing the underlying issue will only temporarily remove the Check Engine Light, but the problem will likely reoccur.

8. Are there any DIY tips for troubleshooting OBDII code P1794 in an Isuzu?

- DIY tips include checking for loose or damaged wires, ensuring proper sensor connections, and consulting the vehicle's service manual for specific diagnostic procedures.

9. How much does it typically cost to repair OBDII code P1794 in an Isuzu at a professional auto repair shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

10. Can a certified mechanic help me diagnose and fix OBDII code P1794 in my Isuzu's automatic transmission?

- Yes, a certified mechanic with experience in diagnosing and repairing transmission issues can help pinpoint the exact cause of the problem and perform necessary repairs.