AutoCodes – GMC – P1915 2016 GMC Sierra

P1915 2016 GMC Sierra Code - Internal Mode Switch Start/Wrong Range

Quick Answer

The park/neutral position switch and the 5 Hall Effect switches are internal to and part of the internal mode switch assembly. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal 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: P1915 2016 GMC Sierra indicates Internal Mode Switch Start/Wrong Range.
Common causes: Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal 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 176

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1915 2016 GMC Sierra Description

The park/neutral position switch and the 5 Hall Effect switches are internal to and part of the internal mode switch assembly. The park/neutral switch indicates to the engine control module (ECM) if the vehicle is in park/neutral or in a drive gear range. With the ignition ON, the ECM provides 12 V on the park/neutral signal to the park/neutral position switch. A separate ground wire from the park/neutral position switch to the Transmission Control Module (TCM) completes the path to ground. When the gear shift lever in park or neutral, the switch closes and drops the voltage on the signal circuit to 0 V. In this state the engine will start and run. In reverse or drive range the park/neutral switch opens, 12 V is then present on the signal circuit which will inhibit engine starting. The Diagnostic Trouble Code (DTC) will be set when the internal mode switch Park/Neutral circuit does indicate Park or Neutral during engine start.

OBDII Code P1915 2016 GMC Sierra - Internal Mode Switch Start/Wrong Range - AutoCodes.com — P1915 2016 GMC Sierra Code - Internal Mode Switch Start/Wrong Range

What does this mean?

What are the Possible Causes of the DTC P1915 2016 GMC Sierra?

Faulty Transmission Internal Mode Switch
Transmission Internal Mode Switch harness is open or shorted
Transmission Internal Mode Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1915 2016 GMC Sierra?

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 P1915 2016 GMC Sierra 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 P1915 2016 GMC Sierra code?

Need more information on how to fix the P1915 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 P1915 2016 GMC Sierra Code

1. What are the common symptoms of an Internal Mode Switch Start/Wrong Range OBDII code (P1915) in a 2016 GMC Sierra?

- Common symptoms include issues with starting the vehicle, incorrect gear display on the dashboard, and transmission shifting problems.

2. What can cause the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in a 2016 GMC Sierra?

- Possible causes include a faulty internal mode switch, wiring issues, a defective transmission position sensor, or a problem with the transmission control module.

3. How can I diagnose the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in my 2016 GMC Sierra?

- Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the internal mode switch and related components for proper operation, and inspecting the wiring for any damage.

4. Can I drive my 2016 GMC Sierra with the Internal Mode Switch Start/Wrong Range OBDII code (P1915) present?

- It is not recommended to drive the vehicle with this code present as it can lead to transmission issues and potential safety hazards.

5. How can I repair the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in my 2016 GMC Sierra?

- Repair options may include replacing the internal mode switch, repairing damaged wiring, replacing the transmission position sensor, or reprogramming the transmission control module.

6. Is it possible to reset the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in a 2016 GMC Sierra without making any repairs?

- While clearing the code may temporarily remove the warning light, it is essential to address the underlying issue to prevent further problems.

7. How much does it typically cost to fix the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in a 2016 GMC Sierra?

- The cost of repairs can vary depending on the specific cause of the code, parts needed, and labor rates. It is advisable to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast without much experience fix the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in a 2016 GMC Sierra?

- While some simple repairs like checking wiring connections can be done by DIY enthusiasts, diagnosing and fixing complex issues related to this code may require professional expertise.

9. Will the Internal Mode Switch Start/Wrong Range OBDII code (P1915) cause my 2016 GMC Sierra to fail an emissions test?

- Yes, having this code present can cause your vehicle to fail an emissions test as it indicates a problem with the transmission system.

10. How can I prevent the recurrence of the Internal Mode Switch Start/Wrong Range OBDII code (P1915) in my 2016 GMC Sierra?

- Regular maintenance, timely repairs of any transmission-related issues, and addressing warning lights promptly can help prevent the reoccurrence of this OBDII code.