P279C 2018 Chevrolet Silverado Code - Four Wheel Drive Neutral Range Performance
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
- P279C 2018 Chevrolet Silverado indicates Four Wheel Drive Neutral Range Performance.
- 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 P279C 2018 Chevrolet Silverado 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 P279C 2018 Chevrolet Silverado?
- 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 P279C 2018 Chevrolet Silverado?
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 P279C 2018 Chevrolet Silverado 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 P279C 2018 Chevrolet Silverado code?
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Frequently Asked Questions about P279C 2018 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P279C in a 2018 Chevrolet Silverado related to Four Wheel Drive Neutral Range Performance?
- Common symptoms include difficulty engaging four-wheel drive, erratic shifting, and warning lights on the dashboard.
2. What are the possible causes of OBDII code P279C in a 2018 Chevrolet Silverado?
- Possible causes can include a faulty neutral position sensor, issues with the transfer case control module, or wiring problems.
3. How can I diagnose the cause of OBDII code P279C in my 2018 Chevrolet Silverado?
- Diagnosing the issue may involve performing a visual inspection of wiring, testing the neutral position sensor, and using a scan tool to retrieve fault codes.
4. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P279C present?
- It is not recommended to continue driving with this code active, as it can lead to potential drivability issues and further damage to the vehicle.
5. What are some repair tips for resolving OBDII code P279C in a 2018 Chevrolet Silverado?
- Repair tips may include checking and replacing the neutral position sensor, ensuring proper wiring connections, and resetting the transfer case control module.
6. How much does it typically cost to repair OBDII code P279C in a 2018 Chevrolet Silverado?
- The cost of repair can vary depending on the specific cause of the issue, but it may range from $200 to $500 for parts and labor.
7. Is OBDII code P279C a common issue in 2018 Chevrolet Silverado vehicles?
- While not extremely common, P279C can occur in 2018 Chevrolet Silverado models, especially in those with higher mileage or off-road usage.
8. Can a DIY enthusiast fix OBDII code P279C in a 2018 Chevrolet Silverado?
- Depending on the individual's skill level, some DIY enthusiasts may be able to diagnose and repair P279C by following online guides and using basic tools.
9. Will resetting the OBDII code P279C in a 2018 Chevrolet Silverado make it go away permanently?
- Simply resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.
10. How can regular maintenance help prevent OBDII code P279C in a 2018 Chevrolet Silverado?
- Regular maintenance, including checking fluid levels, inspecting wiring, and following the manufacturer's service schedule, can help prevent issues that lead to code P279C.
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