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P1852 Cadillac Code - Brake Band Apply Solenoid Low Input Voltage

Quick Answer

The P1852 code indicates a low input voltage condition detected in the brake band apply solenoid circuit of a Cadillac vehicle. Common causes include Faulty brake band apply solenoid itself, Damaged or frayed wiring in the solenoid circuit, Poor electrical connections or corroded terminals. 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 Cadillac indicates Brake Band Apply Solenoid Low Input Voltage.
Common causes
Common causes include Faulty brake band apply solenoid itself, Damaged or frayed wiring in the solenoid circuit, Poor electrical connections or corroded terminals.
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 16, 2024
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Code P1852 Cadillac Description

The P1852 code indicates a low input voltage condition detected in the brake band apply solenoid circuit of a Cadillac vehicle. This solenoid is a critical component of the transmission system, specifically in vehicles equipped with automatic transmissions. The brake band apply solenoid is responsible for controlling the engagement of the brake bands, which are essential for shifting gears smoothly and effectively. When the solenoid receives insufficient voltage, it can lead to improper engagement of the brake bands, resulting in erratic shifting behavior or even complete transmission failure.

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

Common Causes of P1852 Cadillac

  1. Faulty brake band apply solenoid itself.
  2. Damaged or frayed wiring in the solenoid circuit.
  3. Poor electrical connections or corroded terminals.
  4. Malfunctioning transmission control module (TCM).
  5. Low transmission fluid levels or contaminated fluid affecting solenoid operation.

Symptoms of P1852 Cadillac

  1. Harsh or erratic shifting between gears.
  2. Delayed engagement when shifting from park to drive or reverse.
  3. Transmission slipping, causing a loss of power during acceleration.
  4. Illuminated check engine light or transmission warning light on the dashboard.
  5. Unusual noises from the transmission, such as grinding or whining during operation.

How to Fix P1852 Cadillac

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring and connectors associated with the brake band apply solenoid. Look for any signs of damage, corrosion, or loose connections that could be causing the low voltage issue.
  2. Test Voltage: Use a multimeter to test the voltage at the solenoid connector while the vehicle is in operation. This will help determine if the solenoid is receiving the correct voltage from the TCM.
  3. Replace Solenoid: If the solenoid is found to be faulty, replace it with a new part. Ensure that the new solenoid is compatible with the vehicle's make and model.
  4. Repair Wiring: If damaged wiring or poor connections are identified, repair or replace the affected wiring and ensure all connections are secure and free of corrosion.
  5. Reprogram TCM: If the TCM is suspected to be malfunctioning, it may need to be reprogrammed or replaced, depending on the diagnosis. After repairs, clear the diagnostic trouble codes and perform a test drive to ensure proper operation.

Cost to Fix P1852 Cadillac

The typical repair costs for addressing a P1852 code can vary widely based on the specific diagnosis and repairs needed. Generally, the cost may range from $150 to $600. This estimate includes parts such as a new brake band apply solenoid, which can cost between $50 to $200, and labor costs, which typically range from $80 to $150 per hour. The total labor time for diagnosing and repairing this issue may take anywhere from 1 to 4 hours, depending on the complexity of the repairs and the shop's efficiency. It’s important to note that labor rates can differ significantly based on location, vehicle make and model, and engine type. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer more competitive pricing. Therefore, it is advisable to check local rates for a more precise estimate.

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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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