P279B 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?
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Frequently Asked Questions about P279B 2017 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P279B in a 2017 Chevrolet Silverado related to Four Wheel Drive Low Range Performance?
- Common symptoms may include difficulty engaging or disengaging the four-wheel-drive low range mode, erratic shifting behavior, and a warning light on the dashboard.
2. What are some possible causes of OBDII code P279B in a 2017 Chevrolet Silverado?
- Possible causes may include a faulty transfer case motor, damaged wiring or connectors, low transfer case fluid level, or a malfunctioning control module.
3. How can I diagnose the issue causing OBDII code P279B in my 2017 Chevrolet Silverado?
- A thorough diagnostic scan using an OBDII scanner can help pinpoint the specific issue. Additionally, inspecting the transfer case components and related wiring for any visible damage is recommended.
4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P279B present?
- It is not recommended to continue driving the vehicle with this code present, as it may lead to further damage to the transfer case components and affect the vehicle's drivability.
5. What are some repair tips for addressing OBDII code P279B in a 2017 Chevrolet Silverado?
- Repair tips may include checking and replenishing the transfer case fluid, inspecting and repairing any damaged wiring or connectors, and replacing the transfer case motor if necessary.
6. Is it possible to reset OBDII code P279B in a 2017 Chevrolet Silverado without fixing the underlying issue?
- While clearing the code temporarily may reset the warning light, it is crucial to address the root cause of the problem to prevent the code from reoccurring.
7. How much does it typically cost to repair OBDII code P279B in a 2017 Chevrolet Silverado?
- The cost of repair can vary depending on the specific issue causing the code and the labor rates in your area. It is advisable to consult with a qualified mechanic for an accurate estimate.
8. Can extreme weather conditions impact the performance of the four-wheel-drive low range system in a 2017 Chevrolet Silverado?
- Yes, extreme cold or hot weather conditions can affect the operation of the transfer case components, potentially leading to issues that trigger OBDII code P279B.
9. Are there any preventive maintenance measures I can take to avoid encountering OBDII code P279B in my 2017 Chevrolet Silverado?
- Regularly checking the transfer case fluid level, inspecting the wiring for signs of wear, and following the manufacturer's recommended maintenance schedule can help prevent issues related to this code.
10. How long does it typically take to repair OBDII code P279B in a 2017 Chevrolet Silverado?
- The repair time can vary depending on the complexity of the issue causing the code and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may take longer to diagnose and fix.
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