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P0843 2020 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

Quick Answer

The P0843 diagnostic trouble code (DTC) in a 2020 Honda CR-V indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'A' Circuit being too high. Common causes include Faulty Transmission Fluid Pressure Sensor/Switch, Wiring or connector issues in the sensor circuit, 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
P0843 2020 Honda CR-V indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit High.
Common causes
Common causes include Faulty Transmission Fluid Pressure Sensor/Switch, Wiring or connector issues in the sensor circuit, 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 07, 2024
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Code P0843 2020 Honda CR-V Description

The P0843 diagnostic trouble code (DTC) in a 2020 Honda CR-V indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'A' Circuit being too high. This sensor is essential for monitoring the pressure of the transmission fluid, which is crucial for smooth gear shifts and overall transmission performance. When the sensor detects a high circuit voltage, it triggers the P0843 code, indicating a malfunction in the sensor or its related circuit.

OBDII Code P0843 2020 Honda CR-V - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High
P0843 2020 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

Common Causes of P0843 2020 Honda CR-V

  1. Faulty Transmission Fluid Pressure Sensor/Switch
  2. Wiring or connector issues in the sensor circuit
  3. Low transmission fluid level
  4. Dirty or contaminated transmission fluid
  5. Transmission control module malfunction

Symptoms of P0843 2020 Honda CR-V

  1. Harsh or delayed shifting
  2. Erratic transmission behavior
  3. Transmission slipping
  4. Illuminated Check Engine Light
  5. Reduced fuel efficiency

How to Fix P0843 2020 Honda CR-V

  1. Diagnose the P0843 code using a diagnostic scan tool to identify the specific cause of the high circuit voltage.
  2. Inspect the Transmission Fluid Pressure Sensor/Switch and its wiring for any damage or corrosion. Replace the sensor if necessary.
  3. Check the transmission fluid level and condition. Top up the fluid or perform a transmission fluid flush and refill if needed.
  4. Clear the DTC and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying transmission control module issues.

Cost to Fix P0843 2020 Honda CR-V

The typical repair costs for addressing a P0843 code in a 2020 Honda CR-V can range from $150 to $500, depending on the specific cause of the issue and the required repairs. This estimate includes the cost of parts such as a new Transmission Fluid Pressure Sensor/Switch, transmission fluid, and any necessary labor charges. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple shops to ensure a competitive price.

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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 P0843 2020 Honda CR-V Code

1. What are the common symptoms of OBDII code P0843 in a 2020 Honda CR-V?

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

2. What does the OBDII code P0843 mean for a 2020 Honda CR-V?

- The code indicates a problem with the Transmission Fluid Pressure Sensor/Switch 'A' Circuit registering a high voltage condition.

3. What are the possible causes of OBDII code P0843 in a 2020 Honda CR-V?

- Potential causes include a faulty transmission fluid pressure sensor/switch, damaged wiring or connectors, low transmission fluid level, or a malfunctioning transmission control module.

4. How can I diagnose OBDII code P0843 in my 2020 Honda CR-V?

- Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the transmission fluid level and condition, and inspecting the wiring and connectors related to the pressure sensor/switch.

5. Can I continue driving my 2020 Honda CR-V with OBDII code P0843?

- It is not recommended to continue driving with this code present, as it can lead to further transmission damage and potential safety hazards.

6. How can I repair OBDII code P0843 in my 2020 Honda CR-V?

- Repair may involve replacing the transmission fluid pressure sensor/switch, repairing or replacing damaged wiring, ensuring proper transmission fluid levels, and resetting the trouble codes.

7. Is it possible to reset OBDII code P0843 in a 2020 Honda CR-V without repairs?

- While clearing the code may temporarily turn off the Check Engine Light, it is crucial to address the underlying issue to prevent further transmission problems.

8. Are there any DIY tips for addressing OBDII code P0843 in a 2020 Honda CR-V?

- DIY enthusiasts can start by checking the transmission fluid level and condition, inspecting the sensor/switch wiring, and ensuring all connections are secure before considering professional help.

9. How long does it typically take to repair OBDII code P0843 in a 2020 Honda CR-V?

- The repair time can vary depending on the exact cause of the issue and the expertise of the technician, but it may take a few hours to a full day for thorough diagnosis and repair.

10. Will fixing OBDII code P0843 in a 2020 Honda CR-V be costly?

- The repair cost can vary based on the specific repairs needed, parts required, and labor rates, but addressing the issue promptly can help prevent more significant transmission damage and expenses in the long run.

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