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P1794 Acura Code - Automatic Transmission BARO Signal

Quick Answer

The P1794 diagnostic trouble code (DTC) for Acura vehicles specifically relates to the Automatic Transmission BARO Signal. Common causes include Faulty barometric pressure sensor, Wiring or connector issues in the transmission system, Corrosion or damage to sensor connections. 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 Acura indicates Automatic Transmission BARO Signal.
Common causes
Common causes include Faulty barometric pressure sensor, Wiring or connector issues in the transmission system, Corrosion or damage to sensor connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1794 Acura Description

The P1794 diagnostic trouble code (DTC) for Acura vehicles specifically relates to the Automatic Transmission BARO Signal. This code indicates a problem with the barometric pressure sensor signal in the automatic transmission system. The barometric pressure sensor is responsible for measuring atmospheric pressure and sending this information to the transmission control module (TCM) to help optimize gear shifting and overall performance.

OBDII Code P1794 Acura - Automatic Transmission BARO Signal
P1794 Acura Code - Automatic Transmission BARO Signal

Common Causes of P1794 Acura

  1. Faulty barometric pressure sensor
  2. Wiring or connector issues in the transmission system
  3. Corrosion or damage to sensor connections
  4. Faulty TCM or transmission control module
  5. Electrical issues in the transmission system

Symptoms of P1794 Acura

  1. Erratic shifting or delayed gear changes
  2. Harsh engagements or shifting
  3. Reduced fuel efficiency
  4. Transmission slipping
  5. Illuminated check engine light

How to Fix P1794 Acura

  1. Begin by performing a thorough inspection of the barometric pressure sensor, wiring, and connectors for any visible damage or corrosion.
  2. Test the barometric pressure sensor using a multimeter to check for proper voltage output.
  3. Inspect the TCM for any signs of damage or malfunction and consider reprogramming or replacing if necessary.
  4. Clear the DTC using a scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consult with a professional mechanic for further diagnosis and repairs.

Cost to Fix P1794 Acura

The cost of repairing the P1794 code for Acura vehicles can vary depending on the specific cause of the issue. In general, replacing a faulty barometric pressure sensor can cost between $100 and $200, including parts and labor. If the issue is more complex and requires TCM replacement or extensive wiring repairs, the cost can increase significantly.

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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 Acura Code

1. What does the OBDII code P1794 mean for an Acura?

P1794 indicates an issue with the Automatic Transmission BARO Signal, which relates to the vehicle's barometric pressure sensor providing incorrect or inconsistent data to the transmission control module.

2. What are the common symptoms of code P1794 on an Acura?

Symptoms may include erratic shifting, reduced fuel efficiency, transmission slipping, or the check engine light being illuminated.

3. What causes the P1794 code to appear on an Acura?

Common causes include a faulty barometric pressure sensor, damaged wiring or connectors, or a malfunction in the transmission control module.

4. Can I drive my Acura with a P1794 code?

While the car may still be drivable, ignoring the code can lead to worsening transmission performance and potential long-term damage.

5. How do I diagnose the P1794 code on an Acura?

Diagnosis typically involves checking the barometric pressure sensor, inspecting wiring and connectors for damage, and verifying sensor output using diagnostic tools.

6. How do I fix the P1794 code on an Acura?

Repairs may include replacing the barometric pressure sensor, repairing damaged wiring or connectors, or reprogramming the transmission control module if necessary.

7. Is a P1794 code specific to Acura vehicles?

No, the P1794 code can appear on other vehicles as well, but the diagnosis and repair process may vary depending on the make and model.

8. How much does it cost to repair the P1794 code on an Acura?

Costs can range from $100 to $300 for sensor replacement, with additional costs for wiring repairs or module reprogramming depending on the issue.

9. Can a faulty barometric pressure sensor affect the transmission?

Yes, inaccurate BARO readings can disrupt transmission operation by providing incorrect environmental data to the control module.

10. Do I need special tools to fix the P1794 code on an Acura?

Yes, diagnostic tools such as an OBDII scanner and a multimeter are often required to accurately identify and resolve the issue.

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