P17D4 2016 GMC Sierra Code - Transfer Case Neutral Range Detected in High or Low Range
Quick Answer
The Engine Control Module (ECM) uses the following two ways to determine if the transfer case is in 4WD Low, 4WD High, or Neutral. Common causes include Reprogram Engine Control Module (ECM), Faulty Engine Control Module, Engine Control Module harness is open or shorted. 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
- P17D4 2016 GMC Sierra indicates Transfer Case Neutral Range Detected in High or Low Range.
- Common causes
- Common causes include Reprogram Engine Control Module (ECM), Faulty Engine Control Module, Engine Control Module harness is open or shorted.
- 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 P17D4 2016 GMC Sierra Description
1. The first way is to compare the transmission output speed sensor to the transfer case output speed sensor in order to calculate the transfer case range.
2. The second way is to use a LAN message sent by the transfer case shift control module to the ECM.
The ECM uses this message to determine motor torque required and transmission shifting.
The internal fault detection is handled inside the control module. No external circuit diagnosis is involved.
If the first way and second way of determining transfer case range do not match while in 4WD Low, 4WD High or Neutral, then the Diagnostic Trouble Code (DTC) is set.
What are the Possible Causes of the DTC P17D4 2016 GMC Sierra?
- Reprogram Engine Control Module (ECM)
- Faulty Engine Control Module
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
- Transmission internal mechanical problems
How to Fix the DTC P17D4 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 P17D4 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 P17D4 2016 GMC Sierra code?
Need more information on how to fix the P17D4 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about P17D4 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P17D4 in a 2016 GMC Sierra?
The common symptoms include the transfer case being stuck in neutral, difficulty shifting gears, and a warning light on the dashboard indicating an issue with the transfer case.
2. What could cause the OBDII code P17D4 to trigger in a 2016 GMC Sierra?
The code P17D4 is typically triggered when the transfer case control module detects that the transfer case is in neutral while the vehicle is in high or low range mode.
3. How serious is the OBDII code P17D4 issue in a 2016 GMC Sierra?
Ignoring the P17D4 code can lead to drivability issues and potential damage to the transfer case components. It is recommended to address this issue promptly to avoid further damage.
4. Can I continue to drive my 2016 GMC Sierra with the OBDII code P17D4 present?
It is not advisable to drive the vehicle with the P17D4 code present, as it can affect the vehicle's drivability and potentially cause further damage to the transfer case.
5. What are some possible repair tips for resolving the OBDII code P17D4 in a 2016 GMC Sierra?
Some repair tips include checking the wiring and connectors related to the transfer case, inspecting the transfer case shift motor for proper operation, and verifying the transfer case fluid level.
6. How can I reset the OBDII code P17D4 in my 2016 GMC Sierra after making repairs?
After making the necessary repairs, you can reset the OBDII code P17D4 using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.
7. Is it possible to prevent the OBDII code P17D4 from recurring in my 2016 GMC Sierra?
Regular maintenance, such as checking the transfer case fluid level and ensuring the transfer case components are in good condition, can help prevent the P17D4 code from recurring in the future.
8. Can extreme weather conditions or off-road driving trigger the OBDII code P17D4 in a 2016 GMC Sierra?
Yes, extreme weather conditions or off-road driving can potentially cause issues with the transfer case components, leading to the triggering of the P17D4 code. Regular inspections and maintenance can help mitigate these risks.
9. How can I diagnose the OBDII code P17D4 in my 2016 GMC Sierra if I don't have access to a professional mechanic?
You can start by visually inspecting the transfer case components for any visible damage or loose connections. Additionally, checking the transfer case fluid level and consulting the vehicle's service manual for troubleshooting tips can also be helpful.
10. Are there any recalls or technical service bulletins related to the OBDII code P17D4 in a 2016 GMC Sierra?
It's recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration's website to see if there are any recalls or technical service bulletins related to the P17D4 code in your specific vehicle model and year.
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