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Engine-Codes – GMC – P1852 GMC

P1852 GMC Code - Brake Band Apply Solenoid Low Input Voltage

Quick Answer

The P1852 code indicates a low input voltage signal from the brake band apply solenoid in GMC vehicles, particularly those equipped with automatic transmissions. Common causes include Faulty brake band apply solenoid that is unable to operate correctly, Damaged or corroded wiring or connectors leading to poor electrical connections, Malfunctioning transmission control module (TCM) or powertrain control module (PCM). 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
P1852 GMC indicates Brake Band Apply Solenoid Low Input Voltage.
Common causes
Common causes include Faulty brake band apply solenoid that is unable to operate correctly, Damaged or corroded wiring or connectors leading to poor electrical connections, Malfunctioning transmission control module (TCM) or powertrain control module (PCM).
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 23, 2024
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Code P1852 GMC Description

The P1852 code indicates a low input voltage signal from the brake band apply solenoid in GMC vehicles, particularly those equipped with automatic transmissions. This solenoid is responsible for controlling the application of the brake bands within the transmission, which are crucial for shifting gears and maintaining proper vehicle operation. When the solenoid receives a low voltage signal, it fails to engage or disengage the brake bands effectively, leading to potential transmission issues.

OBDII Code P1852 GMC - Brake Band Apply Solenoid Low Input Voltage
P1852 GMC Code - Brake Band Apply Solenoid Low Input Voltage

Common Causes of P1852 GMC

  1. Faulty brake band apply solenoid that is unable to operate correctly.
  2. Damaged or corroded wiring or connectors leading to poor electrical connections.
  3. Malfunctioning transmission control module (TCM) or powertrain control module (PCM).
  4. Low transmission fluid levels or contaminated fluid affecting solenoid performance.
  5. Mechanical issues within the transmission that prevent proper engagement of the brake bands.

Symptoms of P1852 GMC

  1. Harsh or erratic shifting during acceleration or deceleration.
  2. Slipping of the transmission, where the engine revs without a corresponding increase in vehicle speed.
  3. Delayed engagement when shifting from park to drive or reverse.
  4. Illuminated check engine light on the dashboard.
  5. Unusual noises from the transmission, such as grinding or whining sounds.

How to Fix P1852 GMC

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the P1852 code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Inspect the wiring and connectors associated with the brake band apply solenoid for signs of damage, corrosion, or loose connections.
  3. Solenoid Replacement: If the solenoid is determined to be faulty, replace it with a new component. Ensure that the new solenoid is compatible with the vehicle's make and model.
  4. Fluid Check and Replacement: Check the transmission fluid level and condition. If the fluid is low or contaminated, perform a fluid change and refill to the proper level.
  5. Reprogramming or Resetting: After repairs, it may be necessary to reset the TCM or PCM to clear any stored codes and ensure proper operation of the transmission system.

Cost to Fix P1852 GMC

The typical repair costs for addressing a P1852 code can range from $200 to $800, depending on the specific repairs needed. This estimate includes parts such as a new brake band apply solenoid, which can cost between $50 and $200, and labor costs that can vary significantly. Labor rates typically range from $80 to $150 per hour, with metropolitan areas and dealerships often charging higher rates. Independent shops may offer lower rates. It's advisable to consult local repair shops for a more accurate estimate based on the specific vehicle make and model, as well as the complexity of the repair required.

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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.

Frequently Asked Questions about P1852 GMC Code

1. What are the common symptoms of OBDII code P1852 GMC (Brake Band Apply Solenoid Low Input Voltage)?

The common symptoms include harsh shifting, erratic transmission behavior, and the transmission may not engage properly.

2. What are the possible causes of OBDII code P1852 GMC?

Possible causes include a faulty brake band apply solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or a malfunctioning transmission control module.

3. How can I diagnose the issue related to OBDII code P1852 GMC?

Diagnosis typically involves inspecting the brake band apply solenoid and its wiring, checking the transmission fluid level, and using a scan tool to monitor the solenoid's voltage and operation.

4. Can I continue driving my vehicle with OBDII code P1852 GMC?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the transmission system.

5. What are some repair tips for fixing OBDII code P1852 GMC?

Repair tips may include replacing the faulty brake band apply solenoid, repairing any damaged wiring or connectors, ensuring the transmission fluid level is correct, and resetting the trouble code after repairs are made.

6. Is OBDII code P1852 GMC a serious issue?

Yes, this code can indicate a problem with the transmission system, so it should be addressed promptly to prevent further damage and ensure safe operation of the vehicle.

7. Can a DIY enthusiast fix OBDII code P1852 GMC at home?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code at home. However, working on transmission systems can be complex, so professional help is recommended if unsure.

8. How much does it typically cost to repair OBDII code P1852 GMC?

The cost of repair can vary depending on the exact cause of the code and whether parts need to be replaced. It is advisable to get a diagnosis from a mechanic to determine the exact cost.

9. Are there any preventive measures to avoid OBDII code P1852 GMC in the future?

Regular maintenance of the transmission system, such as checking the fluid level and condition, can help prevent issues that may trigger this code. Additionally, addressing any transmission-related symptoms promptly can help avoid further complications.

10. Can OBDII code P1852 GMC be intermittent?

Yes, it is possible for this code to be intermittent, especially if the issue is related to a loose connection or intermittent fault in the solenoid circuit. If the code clears on its own, it is still recommended to have the vehicle inspected to prevent potential future problems.

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