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P0842 Acura Code - Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit Low

Quick Answer

The P0842 code for Acura vehicles indicates a problem with the Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit being too low. Common causes include Faulty transmission fluid pressure switch, Wiring or connector issues, Low transmission fluid level. 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
P0842 Acura indicates Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit Low.
Common causes
Common causes include Faulty transmission fluid pressure switch, Wiring or connector issues, Low transmission fluid level.
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 11, 2024
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Code P0842 Acura Description

The P0842 code for Acura vehicles indicates a problem with the Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit being too low. The transmission fluid pressure switch is responsible for monitoring the pressure of the transmission fluid in the hydraulic circuit. The 2nd clutch circuit specifically controls the engagement and disengagement of the 2nd gear in the transmission.

OBDII Code P0842 Acura - Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit Low
P0842 Acura Code - Transmission Fluid Pressure Switch 'A' 2nd Clutch Circuit Low

Common Causes of P0842 Acura

  1. Faulty transmission fluid pressure switch
  2. Wiring or connector issues
  3. Low transmission fluid level
  4. Contaminated transmission fluid
  5. Internal transmission problems

Symptoms of P0842 Acura

  1. Harsh or delayed shifting
  2. Transmission slipping
  3. Difficulty engaging gears
  4. Transmission overheating
  5. Illumination of the Check Engine Light

How to Fix P0842 Acura

  1. Perform a diagnostic scan to confirm the P0842 code and identify the specific cause of the low pressure condition.
  2. Inspect the transmission fluid pressure switch, wiring, and connectors for any signs of damage or corrosion.
  3. Check the transmission fluid level and quality, topping off or replacing the fluid as needed.
  4. Replace the transmission fluid pressure switch if it is found to be faulty.
  5. Clear the code and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0842 Acura

The typical repair costs for addressing a P0842 code in an Acura vehicle can range from $200 to $500, including parts and labor. However, the specific cost can vary based on the extent of the issue, the need for additional repairs, and the rates charged by auto repair shops. It's advisable to check with local shops for a more accurate estimate based on your specific vehicle and location. Remember that labor rates can vary significantly, with hourly rates typically ranging from $80 to $150.

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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 P0842 Acura Code

1. What is OBDII code P0842 in an Acura?

Code P0842 indicates that the Transmission Fluid Pressure Sensor/Switch 'A' for the 2nd clutch in your Acura has reported a low voltage or pressure deviation from the expected value.

2. What are common symptoms of the P0842 code in an Acura?

Symptoms can include delayed or harsh shifting, the transmission slipping, the Check Engine Light turning on, and in some cases, the vehicle entering "limp" mode to prevent further damage.

3. What causes the P0842 code to appear in an Acura?

Possible causes include low transmission fluid levels, faulty transmission fluid pressure sensor/switch, wiring issues (shorts or opens), or a problem with the transmission control module.

4. How do I fix the P0842 code in my Acura?

To fix this code, start by checking the transmission fluid level and condition. If the fluid is low or dirty, it should be filled up or changed. If the fluid is in good condition, inspect the wiring and connectors for damage, and replace the transmission fluid pressure sensor if necessary.

5. Can I drive my Acura with the P0842 code?

While the vehicle might still be drivable, it is not recommended to continue driving with this code active as it can lead to further transmission damage. It is best to address the issue as soon as possible.

6. What tools are needed to diagnose the P0842 code on an Acura?

Diagnosing this code typically requires a scan tool to read the code and monitor transmission fluid pressure, a digital multimeter for electrical testing, and possibly a pressure gauge set for transmission diagnostics.

7. How much does it typically cost to repair the P0842 code in an Acura?

The cost can vary significantly based on the cause. Sensor replacement might cost between $150 and $300, while more severe issues like wiring repairs or transmission damage can increase the cost substantially.

8. Is the P0842 code serious for the health of my Acura?

Yes, this code is serious as it relates to the transmission's operation, which is crucial for the drivability and safety of your vehicle. Ignoring it can lead to more significant transmission issues.

9. How often should the transmission fluid be checked to avoid issues like P0842?

It's good practice to check your transmission fluid every oil change, or at least twice a year. Regular checks can help catch issues like low fluid levels before they result in transmission damage and fault codes like P0842.

10. What is the role of the Transmission Fluid Pressure Switch in an Acura?

The switch monitors the pressure of the transmission fluid to ensure it is at proper levels for optimal transmission performance. It sends this information to the transmission control module to help regulate shifting and operation efficiency.

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