AutoCodes – Honda – P0843 2021 Honda CR-V

P0843 2021 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

Quick Answer

The Continuously Variable Transmission (CVT) driven pulley pressure sensor uses a strain gauge. Common causes include Faulty CVT Driven Pulley Pressure Sensor, CVT Driven Pulley Pressure Sensor harness is open or shorted, CVT Driven Pulley Pressure Sensor circuit poor electrical connection. 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 2021 Honda CR-V indicates Transmission Fluid Pressure Sensor/Switch 'A' Circuit High.
Common causes: Common causes include Faulty CVT Driven Pulley Pressure Sensor, CVT Driven Pulley Pressure Sensor harness is open or shorted, CVT Driven Pulley Pressure Sensor circuit poor electrical connection.
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.

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Code Popularity 347

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jan 30, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0843 2021 Honda CR-V Description

The Continuously Variable Transmission (CVT) driven pulley pressure sensor uses a strain gauge. The output voltage changes depending on the driven pulley pressure. The Powertrain Control Module (PCM) sends a 5 V reference voltage to the sensor through a pull-up resistor. When the driven pulley pressure is low, the sensor resistance decreases and the PCM detects a low signal voltage. Conversely, when the driven pulley pressure is high, the sensor resistance increases, and the PCM detects a high signal voltage. If the CVT driven pulley pressure sensor signal voltage is a specified voltage for a set time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0843 2021 Honda CR-V - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High - AutoCodes.com — P0843 2021 Honda CR-V Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0843 2021 Honda CR-V?

Faulty CVT Driven Pulley Pressure Sensor
CVT Driven Pulley Pressure Sensor harness is open or shorted
CVT Driven Pulley Pressure Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0843 2021 Honda CR-V?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0843 2021 Honda CR-V code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0843 2021 Honda CR-V code?

Need more information on how to fix the P0843 2021 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0843 2021 Honda CR-V code diagnosed by a professional: Find a repair shop in your area

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 2021 Honda CR-V Code

1. What are the common symptoms of OBDII code P0843 in a 2021 Honda CR-V?

- Common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and an illuminated check engine light.

2. What causes the Transmission Fluid Pressure Sensor/Switch 'A' Circuit High error code in a 2021 Honda CR-V?

- The code P0843 is typically triggered by a faulty transmission fluid pressure sensor/switch, wiring issues, low transmission fluid levels, or a malfunctioning transmission control module.

3. How serious is the P0843 error code in a 2021 Honda CR-V?

- Ignoring the P0843 code can lead to further transmission damage and potential safety hazards. It is advisable to address the issue promptly to prevent extensive repair costs.

4. Can I continue driving my 2021 Honda CR-V with the P0843 code present?

- It is not recommended to continue driving with the P0843 code active, as it can result in transmission-related issues and potentially leave you stranded on the road.

5. How can I diagnose the cause of the P0843 code in my 2021 Honda CR-V?

- A proper diagnosis involves using a scan tool to retrieve the OBDII code, checking the transmission fluid level and condition, inspecting the wiring harness for any damage, and testing the transmission pressure sensor/switch.

6. What are some DIY repair tips for resolving the P0843 code in a 2021 Honda CR-V?

- DIY enthusiasts can start by checking the transmission fluid level, inspecting the wiring connections, and cleaning or replacing the transmission fluid pressure sensor/switch if necessary. However, complex repairs may require professional intervention.

7. How much does it typically cost to repair the P0843 code in a 2021 Honda CR-V?

- Repair costs for the P0843 code can vary depending on the root cause of the issue. Expenses may include sensor replacement, wiring repairs, or even transmission fluid flushes, with total costs ranging from $100 to $500 or more.

8. Can a faulty transmission fluid pressure sensor/switch cause other transmission issues in a 2021 Honda CR-V?

- Yes, a malfunctioning transmission fluid pressure sensor/switch can lead to various transmission problems like erratic shifting, gear slippage, and overall poor transmission performance.

9. Are there any recalls or technical service bulletins related to the P0843 code in a 2021 Honda CR-V?

- It's advisable to check with Honda dealerships or visit the National Highway Traffic Safety Administration (NHTSA) website for any recalls or technical service bulletins related to the P0843 code in the 2021 Honda CR-V.

10. How can I prevent the recurrence of the P0843 code in my 2021 Honda CR-V?

- Regular maintenance, including checking and maintaining proper transmission fluid levels, inspecting wiring connections, and addressing any warning signs promptly, can help prevent the reoccurrence of the P0843 code in your Honda CR-V.