P279B 2014 Chevrolet Silverado Code - Four Wheel Drive Low 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
- P279B 2014 Chevrolet Silverado indicates Four Wheel Drive Low 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 P279B 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 P279B 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 P279B 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 P279B 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 P279B 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P279B 2014 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P279B on a 2014 Chevrolet Silverado?
The common symptoms include difficulty engaging or disengaging four-wheel drive low range, reduced performance in low range mode, and dashboard warning lights.
2. What are the possible causes of OBDII code P279B on a 2014 Chevrolet Silverado?
Possible causes include a faulty transfer case control module, issues with the transfer case motor, damaged wiring or connectors, or a malfunctioning transfer case actuator.
3. How can I diagnose the cause of OBDII code P279B on my 2014 Chevrolet Silverado?
Diagnosing the issue typically involves conducting a thorough inspection of the transfer case components, checking for any visible damage or loose connections, and using a diagnostic scanner to retrieve specific fault codes.
4. Can I continue driving my 2014 Chevrolet Silverado with OBDII code P279B present?
It is not recommended to continue driving with this code active, as it could lead to further damage to the transfer case components and potentially affect the vehicle's overall performance.
5. How can I repair OBDII code P279B on my 2014 Chevrolet Silverado?
Repair options may include replacing the transfer case control module, repairing or replacing damaged wiring, addressing any issues with the transfer case motor or actuator, and clearing the fault code with a diagnostic tool.
6. Is it possible to reset OBDII code P279B on a 2014 Chevrolet Silverado without fixing the underlying issue?
While you can clear the fault code temporarily, it is crucial to address the root cause of the problem to prevent the code from reoccurring and ensure the proper functioning of the four-wheel drive system.
7. Are there any preventive maintenance tips to avoid OBDII code P279B on a 2014 Chevrolet Silverado?
Regularly inspecting the transfer case components for signs of wear or damage, ensuring proper lubrication of moving parts, and addressing any abnormal noises or behaviors promptly can help prevent issues leading to this fault code.
8. Can extreme weather conditions or off-road driving trigger OBDII code P279B on a 2014 Chevrolet Silverado?
Yes, harsh driving conditions such as extreme cold or heat, as well as frequent off-road use, can potentially contribute to the development of issues that may trigger this fault code.
9. Is it necessary to visit a dealership or mechanic to diagnose and repair OBDII code P279B on a 2014 Chevrolet Silverado?
While professional assistance is recommended for accurate diagnosis and repair, experienced DIYers with the necessary tools and knowledge may be able to address the issue themselves.
10. How long does it typically take to repair OBDII code P279B on a 2014 Chevrolet Silverado?
The repair time can vary depending on the exact cause of the issue and the complexity of the repair process. It is best to consult with a professional technician for a more accurate estimate.
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