Engine-CodesChevrolet – P07BF 2023 Chevrolet Silverado

P07BF 2023 Chevrolet Silverado Code - Transmission Input Speed Sensor Circuit Low Voltage

Quick Answer

The P07BF diagnostic trouble code (DTC) indicates that the Transmission Input Speed Sensor is reporting a low voltage condition to the vehicle's Engine Control Module (ECM). Common causes include Faulty transmission input speed sensor, Damaged or corroded wiring and connectors related to the sensor, Issues with the transmission control module (TCM). 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
P07BF 2023 Chevrolet Silverado indicates Transmission Input Speed Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty transmission input speed sensor, Damaged or corroded wiring and connectors related to the sensor, Issues with the transmission control module (TCM).
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.
Table of contents Created and updated by William Orellana on Jun 01, 2026
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Code P07BF 2023 Chevrolet Silverado Description

The P07BF diagnostic trouble code (DTC) indicates that the Transmission Input Speed Sensor is reporting a low voltage condition to the vehicle's Engine Control Module (ECM). The input speed sensor plays a critical role in the operation of the transmission by monitoring the rotational speed of the input shaft. This information is essential for the ECM to determine the appropriate shift points, optimize engine performance, and manage fuel efficiency. When the sensor detects a voltage that is lower than the expected range, it can lead to erratic transmission behavior, such as harsh shifting, slipping, or even failure to shift altogether.

OBDII Code P07BF 2023 Chevrolet Silverado - Transmission Input Speed Sensor Circuit Low Voltage
P07BF 2023 Chevrolet Silverado Code - Transmission Input Speed Sensor Circuit Low Voltage

Common Causes of P07BF 2023 Chevrolet Silverado

  1. Faulty transmission input speed sensor.
  2. Damaged or corroded wiring and connectors related to the sensor.
  3. Issues with the transmission control module (TCM).
  4. Low transmission fluid levels or contaminated fluid.
  5. Mechanical issues within the transmission itself, such as worn gears or bearings.

Symptoms of P07BF 2023 Chevrolet Silverado

  1. Erratic or harsh shifting of the transmission.
  2. Slipping transmission or inability to maintain gear.
  3. Illuminated check engine light on the dashboard.
  4. Poor acceleration or reduced engine performance.
  5. Transmission overheating due to improper fluid flow.

How to Fix P07BF 2023 Chevrolet Silverado

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the P07BF code and check for any related codes that may provide additional insight into the issue.
  2. Visual Inspection: Inspect the wiring and connectors associated with the input speed sensor for signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Sensor Replacement: If the sensor is determined to be faulty, replace it with a new, OEM-quality part to ensure proper function.
  4. Fluid Check: Examine the transmission fluid level and condition. If low or contaminated, perform a fluid change and refill to the manufacturer's specifications.
  5. TCM Evaluation: If the problem persists after replacing the sensor, further diagnose the transmission control module for faults or reprogramming needs.

Cost to Fix P07BF 2023 Chevrolet Silverado

The typical repair costs for addressing a P07BF code can vary widely based on the specific issue and the labor involved. On average, the cost for parts (such as a new input speed sensor) may range from $50 to $150. Labor costs can vary significantly, typically ranging from $80 to $150 per hour, depending on the shop's location and reputation. Overall, the total repair costs could range from $150 to $600, depending on the complexity of the issue and any additional repairs needed. It's important to note that labor rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. For a precise estimate, it's advisable to consult local repair shops and obtain quotes based on the specific diagnosis and required repairs.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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