P1915 2018 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 2018 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.
Code P1915 2018 GMC Sierra Description
What are the Possible Causes of the DTC P1915 2018 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 2018 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 2018 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 2018 GMC Sierra code?
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Frequently Asked Questions about P1915 2018 GMC Sierra Code
What does the OBDII code P1915 mean for a 2018 GMC Sierra?
Code P1915 indicates an issue with the Internal Mode Switch, specifically detecting a start signal in the wrong transmission range.
What are the common symptoms of code P1915 in a 2018 GMC Sierra?
Symptoms may include difficulty starting the vehicle, transmission stuck in one gear, or erratic shifting behavior.
What causes the P1915 code on a 2018 GMC Sierra?
Common causes include a faulty Internal Mode Switch, damaged wiring or connectors, or a malfunctioning Transmission Control Module (TCM).
Can driving with the P1915 code cause further damage?
Yes, driving with this code can lead to transmission damage or unsafe driving conditions due to improper gear selection.
How can I diagnose the P1915 code on my 2018 GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the Internal Mode Switch and its wiring, and check for other related transmission codes.
Is the P1915 code related to the transmission system?
Yes, it specifically relates to the Internal Mode Switch, which is part of the transmission system.
What repairs are needed to fix the P1915 code on a 2018 GMC Sierra?
Repairs may involve replacing the Internal Mode Switch, repairing damaged wiring, or reprogramming the Transmission Control Module.
Can a faulty battery cause the P1915 code?
A weak or faulty battery can potentially contribute to electrical issues, but it is not a primary cause of this code.
How much does it typically cost to repair the P1915 code on a 2018 GMC Sierra?
Costs vary but may range from $200 to $600 depending on whether the Internal Mode Switch or wiring needs replacement.
Do I need a mechanic to fix the P1915 code on my GMC Sierra?
While basic diagnostics can be done at home, a mechanic is recommended for repairs involving the transmission system.
Discuss the causes and fixes for P1915 2018 GMC Sierra OBDII Code
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