Engine-Codes.com
Engine-Codes – Generic – P071C

P071C Code - Transmission Mode Switch 'A' Circuit High

Quick Answer

The P071C diagnostic trouble code (DTC) refers to the Transmission Mode Switch 'A' Circuit High. Common causes include Faulty transmission mode switch, Wiring issues or short circuits in the transmission mode switch circuit, Malfunctioning transmission control module. 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
P071C indicates Transmission Mode Switch 'A' Circuit High.
Common causes
Common causes include Faulty transmission mode switch, Wiring issues or short circuits in the transmission mode switch circuit, Malfunctioning transmission control module.
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 09, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P071C Description

The P071C diagnostic trouble code (DTC) refers to the Transmission Mode Switch 'A' Circuit High. This code is typically found in vehicles with automatic transmissions and is related to the transmission mode switch, which is responsible for determining the desired gear selection of the transmission. The transmission mode switch 'A' circuit high code indicates that there is a high voltage signal detected in the circuit related to the transmission mode switch 'A'. This could be caused by a wiring issue, a faulty transmission mode switch, or a problem with the transmission control module.

OBDII Code P071C - Transmission Mode Switch 'A' Circuit High
P071C Code - Transmission Mode Switch 'A' Circuit High

Common Causes of P071C

  1. Faulty transmission mode switch
  2. Wiring issues or short circuits in the transmission mode switch circuit
  3. Malfunctioning transmission control module
  4. Corrosion or damage to connectors related to the transmission mode switch
  5. Electrical issues such as a blown fuse affecting the transmission mode switch circuit

Symptoms of P071C

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

How to Fix P071C

  1. Begin by conducting a visual inspection of the transmission mode switch and its wiring to check for any visible damage or corrosion.
  2. Use a multimeter to test the voltage and continuity of the transmission mode switch circuit to pinpoint any electrical issues.
  3. Replace the transmission mode switch if it is found to be faulty, ensuring proper installation and connection.
  4. Clear the DTC from the vehicle's computer using a scan tool and test drive the vehicle to confirm that the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying issues with the transmission control module or wiring harness.

Cost to Fix P071C

The cost of repairing a P071C code can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the parts for a transmission mode switch replacement can range from $50 to $150, while labor costs can add another $100 to $200. Overall, the total repair cost could amount to $150 to $350. However, it's important to note that labor rates at auto repair shops can fluctuate, so it's advisable to check with local shops for a more accurate estimate.

Need more information about the P071C code?

Need more information on how to fix the P071C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P071C 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 P071C Code

1. What are the common symptoms of OBDII code P071C - Transmission Mode Switch 'A' Circuit High?

- Common symptoms include issues with shifting gears, transmission slipping, illuminated Check Engine light, and decreased fuel efficiency.

2. What are the possible causes of OBDII code P071C?

- The code P071C can be caused by a faulty transmission mode switch, wiring issues in the circuit, or a malfunction in the transmission control module.

3. How serious is OBDII code P071C - Transmission Mode Switch 'A' Circuit High?

- This code should be addressed promptly as it can lead to transmission problems and affect the overall performance and safety of the vehicle.

4. Can I continue driving my vehicle with OBDII code P071C present?

- It is not recommended to continue driving with this code present, as it can potentially cause further damage to the transmission system.

5. How can the OBDII code P071C be diagnosed?

- A professional mechanic can use a diagnostic scanner to retrieve the code and perform further testing to pinpoint the exact cause of the issue.

6. Are there any DIY repair tips for OBDII code P071C?

- DIY repair for this code may involve checking the transmission mode switch and related wiring for any visible damage or loose connections. However, complex repairs should be left to professionals.

7. How much does it typically cost to repair OBDII code P071C?

- The cost of repairing OBDII code P071C can vary depending on the underlying issue, but it may range from $200 to $500 or more, including parts and labor.

8. Can resetting the Check Engine light resolve OBDII code P071C?

- Resetting the Check Engine light may temporarily clear the code, but it will not fix the underlying issue causing the code to appear.

9. Is it necessary to replace the transmission mode switch to fix OBDII code P071C?

- In many cases, replacing the faulty transmission mode switch is necessary to resolve OBDII code P071C and restore proper transmission function.

10. How can I prevent OBDII code P071C from recurring in the future?

- Regular maintenance of the transmission system, including checking for any signs of wear or damage, can help prevent the reoccurrence of OBDII code P071C.

Discuss the causes and fixes for P071C OBDII Code

Submit a New Comment

Code P071C comments

No comments found for this page.