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P0843 2019 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

Quick Answer

The P0843 diagnostic trouble code (DTC) for a 2019 Honda CR-V refers to the Transmission Fluid Pressure Sensor/Switch 'A' Circuit High. Common causes include Faulty transmission fluid pressure sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM. 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 2019 Honda CR-V indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit High.
Common causes
Common causes include Faulty transmission fluid pressure sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM.
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 14, 2024
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Code P0843 2019 Honda CR-V Description

The P0843 diagnostic trouble code (DTC) for a 2019 Honda CR-V refers to the Transmission Fluid Pressure Sensor/Switch 'A' Circuit High. This code indicates that there is a high voltage condition detected in the transmission fluid pressure sensor or switch circuit. The transmission fluid pressure sensor is responsible for monitoring the hydraulic pressure in the transmission system and sending this information to the vehicle's engine control module (ECM). The ECM uses this data to adjust shift points and ensure smooth operation of the transmission.

OBDII Code P0843 2019 Honda CR-V - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High
P0843 2019 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

Common Causes of P0843 2019 Honda CR-V

  1. Faulty transmission fluid pressure sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Malfunctioning ECM
  4. Low transmission fluid levels
  5. Contaminated transmission fluid

Symptoms of P0843 2019 Honda CR-V

  1. Harsh shifting or slipping gears
  2. Limp mode activation
  3. Reduced fuel efficiency
  4. Illumination of the check engine light
  5. Transmission overheating

How to Fix P0843 2019 Honda CR-V

  1. Begin by conducting a thorough inspection of the transmission fluid pressure sensor and its circuitry to identify any visible damage or issues.
  2. Test the transmission fluid pressure sensor using a multimeter to check for proper voltage output.
  3. Inspect the wiring and connectors in the sensor circuit for any signs of damage or corrosion, repairing or replacing as necessary.
  4. Clear the DTC from the vehicle's ECM using a diagnostic scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consider replacing the transmission fluid pressure sensor or consulting a professional technician for further diagnosis.

Cost to Fix P0843 2019 Honda CR-V

The typical repair costs for addressing a P0843 code in a 2019 Honda CR-V can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. For a more precise estimate, it is advisable to check local rates and consult with a trusted mechanic.

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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 2019 Honda CR-V Code

1. What are the common symptoms of OBDII code P0843 in a 2019 Honda CR-V?

Symptoms may include harsh shifting, transmission slippage, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0843 indicate in a 2019 Honda CR-V?

Code P0843 indicates a high voltage condition in the Transmission Fluid Pressure Sensor/Switch 'A' circuit of the transmission.

3. What are the possible causes of OBDII code P0843 in a 2019 Honda CR-V?

Potential causes include a faulty transmission fluid pressure sensor/switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose OBDII code P0843 in my 2019 Honda CR-V?

Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the transmission fluid level and condition, testing the transmission fluid pressure sensor/switch, and checking the related wiring and connectors for any issues.

5. Can I continue driving my 2019 Honda CR-V with OBDII code P0843?

It is not recommended to continue driving with code P0843 present, as it can lead to further transmission damage and potential safety hazards. It is advisable to address the issue promptly.

6. Is it necessary to repair OBDII code P0843 in a 2019 Honda CR-V immediately?

While the vehicle may still be operable with this code, it is important to address the underlying issue promptly to prevent any potential transmission problems and ensure optimal vehicle performance.

7. How much does it typically cost to repair OBDII code P0843 in a 2019 Honda CR-V?

The cost of repairing code P0843 can vary depending on the exact cause of the issue. It may range from a simple sensor replacement to more extensive repairs involving the transmission system.

8. Can I reset OBDII code P0843 in my 2019 Honda CR-V using a scan tool?

Resetting the code with a scan tool may temporarily turn off the Check Engine Light, but it will not fix the underlying problem causing code P0843. It is recommended to diagnose and repair the issue to prevent code recurrence.

9. Is OBDII code P0843 a common issue in 2019 Honda CR-V vehicles?

While not extremely common, code P0843 can occur in 2019 Honda CR-V models due to various factors such as sensor failure, wiring issues, or low transmission fluid levels.

10. Can a DIY enthusiast repair OBDII code P0843 in a 2019 Honda CR-V?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address simpler causes of code P0843, such as replacing the transmission fluid pressure sensor/switch. However, more complex issues may require professional assistance.

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