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P0842 Oldsmobile Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low

Quick Answer

The P0842 code for Oldsmobile indicates an issue with the Transmission Fluid Pressure Sensor/Switch 'A' Circuit being too low. Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues in the sensor circuit, Low transmission fluid levels. 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 Oldsmobile indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low.
Common causes
Common causes include Faulty transmission fluid pressure sensor/switch, Wiring issues in the sensor circuit, Low transmission fluid levels.
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 Oldsmobile Description

The P0842 code for Oldsmobile indicates an issue with the Transmission Fluid Pressure Sensor/Switch 'A' Circuit being too low. This sensor is responsible for monitoring the hydraulic pressure in the transmission system and sending this data to the engine control module. When the pressure is lower than expected, it can lead to various problems with the transmission's performance.

OBDII Code P0842 Oldsmobile - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low
P0842 Oldsmobile Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low

Common Causes of P0842 Oldsmobile

  1. Faulty transmission fluid pressure sensor/switch
  2. Wiring issues in the sensor circuit
  3. Low transmission fluid levels
  4. Malfunctioning transmission pump
  5. Clogged transmission filter

Symptoms of P0842 Oldsmobile

  1. Erratic or delayed shifting
  2. Slipping gears
  3. Harsh shifts
  4. Transmission overheating
  5. Transmission warning light on the dashboard

How to Fix P0842 Oldsmobile

  1. Begin by checking the transmission fluid level and quality. Top up the fluid if necessary and inspect for any signs of contamination or debris.
  2. Inspect the wiring and connections related to the transmission fluid pressure sensor/switch. Repair or replace any damaged wires or connectors.
  3. Test the transmission fluid pressure sensor/switch using a multimeter to determine if it is functioning correctly. Replace the sensor if it is faulty.
  4. Check the transmission pump for proper operation and replace if necessary.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0842 Oldsmobile

The typical repair costs for addressing a P0842 code in an Oldsmobile can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It is essential to factor in the diagnosis time and labor rates, which can vary based on the location and the auto repair shop. It is advisable to consult with a professional mechanic for a more accurate estimate based on the individual circumstances.

What does this mean?

Tech Notes for P0842 Oldsmobile

There is a factory service bulletin for the following Oldsmobile Models:

2001-2002 Oldsmobile Intrigue

2001-2003 Oldsmobile Silhouette

2001-2004 Oldsmobile Silhouette EXT

Oldsmobile Factory Service Bulletin OBDII Code P0842

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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 Oldsmobile Code

1. What are the common symptoms of OBDII code P0842 in an Oldsmobile?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and the transmission going into limp mode.

2. What can cause the Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low code in an Oldsmobile?

- The code P0842 in an Oldsmobile can be caused by a faulty transmission fluid pressure sensor/switch, low transmission fluid level, wiring issues, or a malfunctioning transmission control module.

3. How serious is the P0842 code in an Oldsmobile?

- The P0842 code can lead to drivability issues and potential transmission damage if left unresolved. It is important to address this code promptly to prevent further damage.

4. Can I continue driving my Oldsmobile with the P0842 code?

- It is not recommended to continue driving your Oldsmobile with the P0842 code present, as it can lead to further transmission problems and potential safety hazards.

5. How do I diagnose the cause of the P0842 code in my Oldsmobile?

- Diagnosing the P0842 code typically involves checking the transmission fluid level and condition, inspecting the wiring and connectors related to the pressure sensor/switch, and testing the sensor/switch itself for proper operation.

6. Can I repair the P0842 code in my Oldsmobile myself?

- Depending on your mechanical skills and access to tools, you may be able to repair the P0842 code yourself by replacing the faulty transmission fluid pressure sensor/switch or addressing any wiring issues. However, professional diagnosis and repair are recommended for accurate and lasting solutions.

7. How much does it cost to fix the P0842 code in an Oldsmobile?

- The cost of fixing the P0842 code in an Oldsmobile can vary depending on the root cause of the issue, labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic. Costs may range from a few hundred to over a thousand dollars.

8. Will resetting the OBDII code P0842 make it go away permanently?

- Resetting the OBDII code P0842 may temporarily turn off the check engine light, but if the underlying issue causing the code is not fixed, it is likely to reappear. It is important to address the root cause of the problem to prevent future occurrences.

9. How long does it take to repair the P0842 code in an Oldsmobile?

- The repair time for the P0842 code in an Oldsmobile can vary depending on the complexity of the issue and the availability of parts. Simple fixes like replacing a sensor may take a few hours, while more involved repairs could take a day or more.

10. Will the P0842 code cause my Oldsmobile to fail an emissions test?

- The P0842 code itself may not cause your Oldsmobile to fail an emissions test, but it is an indication of a potential issue with the transmission that could affect emissions. It is recommended to address the code before undergoing an emissions test to ensure your vehicle passes.

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