B0877 - Transmission Range Sensor Circuit Intermittent Problem in 2015-2019 Chevrolet Silverado and GMC Sierra

Quick Answer

B0877 means: B0877 indicates a malfunction in the transmission range sensor circuit.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with B0877? Immediate attention is recommended to avoid potential transmission damage.

Common Questions

What does B0877 mean and how does it affect my car?

B0877 indicates a problem with the transmission range sensor circuit, which can prevent your car from starting or cause transmission shifting issues. It’s vital to address this code to maintain safe driving conditions and avoid more severe transmission damage.

What are the most common causes of B0877 and how much does it cost to fix?

Common causes include a faulty transmission range sensor, damaged wiring, or a malfunctioning transmission control module. Repair costs can range from $100 to $800 depending on the specific issue and required repairs.

Can I drive my car with B0877 or should I stop immediately?

It is advisable to stop driving if you encounter B0877. Continuing to drive could result in severe transmission problems and unsafe driving conditions.

How can I diagnose B0877 myself using GeekOBD APP?

You can use the GeekOBD APP to scan for diagnostic trouble codes, review freeze frame data, and monitor live data from the transmission range sensor. This will help you determine if the sensor is functioning correctly.

What vehicles are most commonly affected by B0877?

This code is commonly found in 2015-2019 Chevrolet Silverado and GMC Sierra models, along with some other GM vehicles during the same production years. Always check for recalls or technical service bulletins related to your specific vehicle.

How can I prevent B0877 from happening again?

Regular maintenance, such as inspecting wiring and connectors for damage, as well as ensuring that any transmission repairs are done correctly can help prevent B0877 from recurring.

What is B0877?

The diagnostic trouble code (DTC) B0877 indicates an issue with the transmission range sensor circuit. This sensor is essential for determining the position of the transmission shifter, which allows the vehicle’s computer to know whether the vehicle is in Park, Reverse, Neutral, or Drive. When the transmission range sensor malfunctions, it can lead to significant drivability issues, including the inability to start the engine or the vehicle unexpectedly shifting gears. For car owners, this may manifest as warning lights on the dashboard, particularly the Check Engine light. If you drive a 2015-2019 Chevrolet Silverado or GMC Sierra, you might encounter this code more frequently due to the complex nature of their electronic systems. Ignoring B0877 could lead to more serious transmission problems, impacting vehicle safety and performance. It’s crucial to address this code promptly to avoid complications and ensure a smooth driving experience.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B0877 is present:

  • The Check Engine light illuminates consistently, indicating a fault in the transmission system.
  • The vehicle may fail to start if it does not recognize the transmission position properly, which can be frustrating and inconvenient.
  • You may experience erratic shifting or the vehicle may get stuck in a single gear, causing difficulty in acceleration and overall drivability.
  • In some cases, the vehicle may display incorrect gear position readings on the dashboard, leading to confusion while driving.
  • Fuel economy may suffer due to miscommunication within the transmission system, resulting in decreased efficiency.

Possible Causes

Most common causes of B0877 (ordered by frequency):

  1. The most common cause of B0877 is a faulty transmission range sensor, which has a likelihood of around 60%. This sensor can wear out over time or suffer damage from external factors.
  2. A second potential cause might be damaged wiring or connectors in the transmission range sensor circuit, which can lead to intermittent signals and trigger the code.
  3. Improper installation of the sensor during previous repairs can also lead to B0877, so it’s essential to ensure that any work done on the transmission is performed correctly.
  4. Less common but serious causes include issues with the transmission control module (TCM), which may require in-depth diagnostics and could be costly to repair.
  5. A rare cause could be a software issue in the vehicle's onboard computer, which may need an update or reprogramming to resolve.

B0877 Repair Costs

Cost Breakdown by Repair Type

Transmission Range Sensor Replacement

Replacing the faulty transmission range sensor with a new one, ensuring proper installation.

  • Total: $150 - $400
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors in the transmission circuit.

  • Total: $100 - $300
  • Success rate: 75%
TCM Replacement or Reprogramming

Replacing or reprogramming the transmission control module if it’s determined to be faulty.

  • Total: $300 - $800
  • Success rate: 90%
Money-Saving Tips for B0877
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B0877 Diagnosis Process

Follow these systematic steps to accurately diagnose B0877. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes). Ensure all connectors are secure.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). This helps to gather more information about the circumstances surrounding the code.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter to test the transmission range sensor and its wiring for continuity and proper voltage levels (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the transmission range sensor and its wiring for continuity and proper voltage levels (20-30 minutes). This step is crucial to identify any faults.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes). Check if the Check Engine light returns.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure that the transmission operates smoothly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure that the transmission operates smoothly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Transmission Range Sensor Replacement in 2017 Chevrolet Silverado

Vehicle: 2017 Chevrolet Silverado 1500, 70,000 miles

Problem: Customer reported the Check Engine light was on and the vehicle was experiencing difficulty starting.

Diagnosis: After conducting a diagnostic scan with the GeekOBD APP, B0877 was identified. A visual inspection revealed a faulty transmission range sensor.

Solution: The transmission range sensor was replaced with a new part, and the system was cleared of codes.

Cost: $250 for parts and labor.

Result: The repair was successful, and the Check Engine light remained off during subsequent tests.

Case Study 2: Wiring Issue in 2015 GMC Sierra

Vehicle: 2015 GMC Sierra 1500, 85,000 miles

Problem: Customer noticed erratic shifting and the Check Engine light was on.

Diagnosis: Diagnostic tests indicated B0877. Inspection revealed damaged wiring connected to the transmission range sensor.

Solution: The damaged wiring was repaired, and the transmission range sensor was tested for functionality.

Cost: $180 for repairs.

Result: The vehicle operated normally post-repair, with no further issues reported.

Diagnose B0877

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: B0877
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes