AutoCodes – Generic – P071C

P071C Code - Transmission Mode Switch 'A' Circuit High

Quick Answer

The Transmission Control Module (TCM) monitors the Transmission Mode Switch signal. Common causes include Faulty Transmission Mode Switch, Transmission Mode Switch harness is open or shorted, Transmission Mode Switch 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: P071C indicates Transmission Mode Switch 'A' Circuit High.
Common causes: Common causes include Faulty Transmission Mode Switch, Transmission Mode Switch harness is open or shorted, Transmission Mode Switch 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 2,251

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P071C Description

The Transmission Control Module (TCM) monitors the Transmission Mode Switch signal. The TCM sets the OBDII code when the Transmission Mode Switch is not to factory specifications.

OBDII Code P071C - Transmission Mode Switch 'A' Circuit High - AutoCodes.com — P071C Code - Transmission Mode Switch 'A' Circuit High

What does this mean?

What are the Possible Causes of the DTC P071C?

Faulty Transmission Mode Switch
Transmission Mode Switch harness is open or shorted
Transmission Mode Switch circuit poor electrical connection

How to Fix the DTC P071C?

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 P071C 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 P071C code?

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

Need Help with the Code?

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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 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.