P279A 2014 Chevrolet Silverado Code - Four Wheel Drive High 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
- P279A 2014 Chevrolet Silverado indicates Four Wheel Drive High 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 P279A 2014 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 P279A 2014 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 P279A 2014 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 P279A 2014 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 P279A 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P279A 2014 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P279A in a 2014 Chevrolet Silverado?
- Common symptoms include difficulty engaging or disengaging four-wheel drive high range, illuminated warning lights on the dashboard, and reduced vehicle performance.
2. What can cause the OBDII code P279A in a 2014 Chevrolet Silverado?
- The code P279A is typically triggered by issues with the four-wheel drive system, such as a faulty transfer case actuator, damaged wiring, or a malfunctioning transfer case control module.
3. How can I diagnose the OBDII code P279A in my 2014 Chevrolet Silverado?
- Diagnosing the code P279A involves using a diagnostic scanner to retrieve the specific fault codes stored in the vehicle's computer system related to the four-wheel drive system. Additionally, a visual inspection of the components and their connections may be necessary.
4. Can I still drive my 2014 Chevrolet Silverado with the OBDII code P279A present?
- It is not recommended to drive your vehicle with the code P279A present, as it can lead to further damage to the four-wheel drive system and potentially compromise the vehicle's safety and performance.
5. How can I repair the OBDII code P279A in my 2014 Chevrolet Silverado?
- Repairing the code P279A may involve replacing the transfer case actuator, repairing any damaged wiring, or reprogramming the transfer case control module. It is advisable to consult a professional mechanic for an accurate diagnosis and proper repair.
6. Is the OBDII code P279A a serious issue in a 2014 Chevrolet Silverado?
- Yes, the OBDII code P279A should be addressed promptly to ensure the proper functioning of the four-wheel drive system and prevent any potential safety hazards while driving.
7. Are there any DIY tips for troubleshooting the OBDII code P279A in a 2014 Chevrolet Silverado?
- While basic troubleshooting steps like checking the fuse related to the four-wheel drive system or inspecting the wiring connections can be done by DIY enthusiasts, complex repairs and diagnosis should be left to professional mechanics.
8. Is it common for the OBDII code P279A to reoccur in a 2014 Chevrolet Silverado after repair?
- If the root cause of the code P279A is not properly addressed during repair, there is a possibility for it to reoccur. It is crucial to ensure a thorough diagnosis and comprehensive repair to prevent the code from coming back.
9. Will resetting the OBDII code P279A in my 2014 Chevrolet Silverado make it go away permanently?
- Simply resetting the code P279A without addressing the underlying issue will not make it go away permanently. The root cause of the problem must be identified and repaired to prevent the code from reappearing.
10. How much can I expect to pay for repairing the OBDII code P279A in a 2014 Chevrolet Silverado?
- The cost of repairing the code P279A can vary depending on the extent of the issue, parts needed, and labor rates. It is advisable to obtain multiple quotes from reputable mechanics to get an accurate estimate.
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