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Engine-Codes – Generic – P1873

P1873 Code - Problem in CVT Pulley Pressure Control Valve Assembly Circuit

Quick Answer

The diagnostic trouble code P1873 indicates a problem in the CVT (Continuously Variable Transmission) Pulley Pressure Control Valve Assembly Circuit. Common causes include Faulty CVT Pulley Pressure Control Valve Assembly, Electrical issues in the circuit, Wiring harness damage or corrosion. 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
P1873 indicates Problem in CVT Pulley Pressure Control Valve Assembly Circuit.
Common causes
Common causes include Faulty CVT Pulley Pressure Control Valve Assembly, Electrical issues in the circuit, Wiring harness damage or corrosion.
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 Sep 13, 2024
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Code P1873 Description

The diagnostic trouble code P1873 indicates a problem in the CVT (Continuously Variable Transmission) Pulley Pressure Control Valve Assembly Circuit. In vehicles equipped with a CVT, this code points to an issue with the valve assembly that controls the pressure within the transmission system. The CVT relies on precise pressure control to smoothly vary the gear ratios, providing seamless acceleration and optimal fuel efficiency.

OBDII Code P1873 - Problem in CVT Pulley Pressure Control Valve Assembly Circuit
P1873 Code - Problem in CVT Pulley Pressure Control Valve Assembly Circuit

Common Causes of P1873

  1. Faulty CVT Pulley Pressure Control Valve Assembly
  2. Electrical issues in the circuit
  3. Wiring harness damage or corrosion
  4. Malfunctioning transmission control module
  5. Low transmission fluid level or contaminated fluid

Symptoms of P1873

  1. Harsh shifting or jerking when accelerating or decelerating
  2. Transmission slipping or delayed engagement
  3. Decreased fuel efficiency
  4. Illumination of the Check Engine Light
  5. Overheating of the transmission fluid

How to Fix P1873

  1. Diagnose the issue using a scan tool to retrieve the trouble codes and perform a thorough inspection of the CVT Pulley Pressure Control Valve Assembly Circuit.
  2. Test the pressure control valve for proper operation and check for any electrical faults or wiring issues.
  3. Replace the faulty pressure control valve assembly if necessary and repair any damaged wiring or connectors.
  4. Clear the trouble codes from the vehicle's memory and perform a test drive to ensure that the issue has been resolved.
  5. Monitor the transmission fluid levels and quality regularly to prevent future issues with the CVT system.

Cost to Fix P1873

The typical repair costs for addressing the P1873 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing the CVT Pulley Pressure Control Valve Assembly and addressing any related electrical or wiring issues can range from $500 to $1500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources to ensure a competitive price. Additionally, factors such as the vehicle make and model, location, and the expertise of the technician can influence the overall repair costs.

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Code P1873 Information for Specific Makes

  • P1873 Buick — Torque Converter Clutch Stator Temperature Switch Circuit Low
  • P1873 Cadillac — Torque Converter Clutch Stator Temperature Switch Circuit Low
  • P1873 Chevrolet — Torque Converter Clutch Stator Temperature Switch Circuit Low
  • P1873 GMC — Torque Converter Clutch Stator Temperature Switch Circuit Low
  • P1873 Honda — Problem in CVT Pulley Pressure Control Valve Assembly Circuit
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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