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P071A Chevrolet Code - Transmission Tow Mode Switch Circuit

Quick Answer

Tow/haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. Common causes include Faulty Transmission Tow Mode Switch, Transmission Tow Mode Switch harness is open or shorted, Transmission Tow 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
P071A Chevrolet indicates Transmission Tow Mode Switch Circuit.
Common causes
Common causes include Faulty Transmission Tow Mode Switch, Transmission Tow Mode Switch harness is open or shorted, Transmission Tow 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 616
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jul 29, 2022
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Code P071A Chevrolet Description

Tow/haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the Body Control Module (BCM) is momentarily toggled from 12 volts to zero volts. The BCM then sends a signal out on the serial data line to the Transmission Control Module (TCM) to increase transmission line pressure and extend the time between upshifts. Selecting the tow/haul switch again disables tow/haul mode and returns the transmission to a normal shift pattern.
OBDII Code P071A Chevrolet - Transmission Tow Mode Switch Circuit - AutoCodes.com
P071A Chevrolet Code - Transmission Tow Mode Switch Circuit
What does this mean?

What are the Possible Causes of the DTC P071A Chevrolet?

  • Faulty Transmission Tow Mode Switch
  • Transmission Tow Mode Switch harness is open or shorted
  • Transmission Tow Mode Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC P071A Chevrolet?

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 P071A Chevrolet 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.

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Need Help with the Code?

Get the P071A Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

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 P071A Chevrolet Code

1. What does the OBDII code P071A mean in a Chevrolet?

P071A indicates an issue with the Transmission Tow Mode Switch Circuit, which controls the tow/haul mode for the vehicle's transmission.

2. What are the common symptoms of code P071A in a Chevrolet?

Symptoms may include the tow/haul mode not activating, erratic transmission behavior, or the tow/haul indicator light failing to illuminate.

3. What causes the P071A code in a Chevrolet?

Common causes include a faulty tow mode switch, damaged wiring or connectors in the circuit, or issues with the transmission control module (TCM).

4. Can I drive with the P071A code active in my Chevrolet?

You can drive the vehicle, but you may experience limited towing capabilities and possible transmission performance issues. It's best to address the issue promptly.

5. How is the P071A code diagnosed in a Chevrolet?

A mechanic will check the tow mode switch, inspect the wiring and connectors, and perform diagnostics on the transmission control module using a scan tool.

6. How do I fix the P071A code in a Chevrolet?

Repairs may include replacing the tow mode switch, repairing damaged wiring or connectors, or reprogramming or replacing the TCM.

7. How much does it cost to repair a P071A code in a Chevrolet?

Repair costs vary but may range from $100 to $300 for switch or wiring repairs, with higher costs if the TCM needs replacement.

8. Can a faulty tow mode switch cause other transmission problems?

Yes, if the tow mode circuit is malfunctioning, it can lead to improper transmission shifts and reduced towing performance.

9. How can I prevent the P071A code in my Chevrolet?

Regularly inspect the tow mode switch for damage and ensure the wiring and connectors are clean and secure.

10. Does the P071A code require reprogramming the transmission control module?

In some cases, if the problem is related to the TCM, reprogramming or replacing the module may be necessary.

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