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Engine-Codes – Generic – P1915

P1915 Code - Internal Mode Switch Start/Wrong Range

Quick Answer

The P1915 code indicates a problem with the internal mode switch start or wrong range in the vehicle. Common causes include Faulty internal mode switch, Wiring issues or shorts in the 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
P1915 indicates Internal Mode Switch Start/Wrong Range.
Common causes
Common causes include Faulty internal mode switch, Wiring issues or shorts in the 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 Aug 25, 2024
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Code P1915 Description

The P1915 code indicates a problem with the internal mode switch start or wrong range in the vehicle. The internal mode switch is responsible for transmitting the gear selection information to the transmission control module. When this switch is not functioning correctly, it can lead to issues with shifting gears, starting the vehicle, or recognizing the correct gear range. This can result in poor performance, transmission slipping, or the vehicle not starting altogether. If left unaddressed, it can cause further damage to the transmission system and lead to costly repairs down the line. The underlying mechanics of this issue may involve a faulty internal mode switch, wiring issues, or problems with the transmission control module.

OBDII Code P1915 - Internal Mode Switch Start/Wrong Range
P1915 Code - Internal Mode Switch Start/Wrong Range

Common Causes of P1915

  1. Faulty internal mode switch
  2. Wiring issues or shorts in the circuit
  3. Malfunctioning transmission control module
  4. Corrosion or damage to connectors
  5. Software glitches in the transmission system

Symptoms of P1915

  1. Difficulty starting the vehicle
  2. Incorrect gear display on the dashboard
  3. Harsh shifting between gears
  4. Transmission slipping
  5. Vehicle stalling or not moving when in gear

How to Fix P1915

  1. Diagnose the issue using a scan tool to confirm the P1915 code and identify the specific problem.
  2. Inspect the internal mode switch and wiring for any damage or corrosion.
  3. Test the transmission control module for proper functionality and reprogram if necessary.
  4. Replace the internal mode switch if it is found to be faulty.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1915

The typical repair costs for addressing a P1915 code can vary depending on the specific issue and the make and model of the vehicle. On average, the parts for replacing an internal mode switch can range from $100 to $300, while labor costs can add another $100 to $200. Overall, the total repair cost could be anywhere from $200 to $500. However, it is important to note that labor rates at auto repair shops can vary, so it is recommended to check with local shops for a more accurate estimate.

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Code P1915 Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

The common symptoms of code P1915 include difficulty shifting gears, erratic shifting behavior, and the inability to start the vehicle.

2. What are the possible causes of OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

Possible causes of code P1915 include a faulty internal mode switch, damaged wiring or connectors related to the internal mode switch, or a malfunction in the transmission control module.

3. How can I diagnose OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

Diagnosing code P1915 typically involves using a scan tool to retrieve the code and examining the internal mode switch and its related wiring for any visible damage or issues.

4. Can a DIY enthusiast repair OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

While some DIY enthusiasts may attempt to repair code P1915 by replacing the internal mode switch or repairing damaged wiring, it is recommended to seek professional help due to the complexity of transmission-related issues.

5. Is it safe to continue driving with OBDII code P1915 (Internal Mode Switch Start/Wrong Range) present?

It is not recommended to continue driving with code P1915 present, as it can lead to further damage to the transmission system and potentially cause safety hazards on the road.

6. How much does it typically cost to repair OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

The cost of repairing code P1915 can vary depending on the specific cause of the issue, but it may range from $200 to $500 for parts and labor.

7. Can a faulty internal mode switch cause other OBDII codes to appear?

Yes, a faulty internal mode switch can cause other related OBDII codes to appear, such as codes related to transmission range sensor issues or communication faults with the transmission control module.

8. How long does it take to repair OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

The repair time for code P1915 can vary depending on the extent of the issue and the availability of parts, but it typically takes a few hours to a full day for a professional technician to diagnose and repair the problem.

9. Are there any preventive maintenance tips to avoid OBDII code P1915 (Internal Mode Switch Start/Wrong Range)?

To prevent code P1915, it is essential to maintain your vehicle's transmission system regularly, address any warning signs promptly, and avoid rough driving habits that can put stress on the internal mode switch.

10. Can resetting the OBDII system clear code P1915 (Internal Mode Switch Start/Wrong Range)?

Resetting the OBDII system may temporarily clear code P1915, but if the underlying issue with the internal mode switch or related components is not addressed, the code is likely to reappear.

Discuss the causes and fixes for P1915 OBDII Code

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  • I ran into a problem with the code P1915 and with codes at the same time B2645,P0700,U0140 and not knowing with code to tackle first I just started checking continuity on the fuses and then to ECM bcm and tcm. All of these check out good. I started checking continuity to the transmission connector and found two wires that didn't have continuity to the tcm and repair the wires and got rid of my problem

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  • Thanks for sharing!!

    Reply to Comment