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Engine-Codes – Generic – P1890

P1890 Code - Shift Control System

Quick Answer

The P1890 code relates to the shift control system in a vehicle, specifically indicating a problem with the transmission shift control module. Common causes include Faulty shift control module, Wiring issues, Sensor malfunctions. 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
P1890 indicates Shift Control System.
Common causes
Common causes include Faulty shift control module, Wiring issues, Sensor malfunctions.
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 15, 2024
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Code P1890 Description

The P1890 code relates to the shift control system in a vehicle, specifically indicating a problem with the transmission shift control module. This code is often found in automatic transmission vehicles and can have a significant impact on the vehicle's performance. The shift control system is responsible for managing the transmission's gear shifting process, ensuring smooth transitions between gears for optimal performance and fuel efficiency.

OBDII Code P1890 - Shift Control System
P1890 Code - Shift Control System

Common Causes of P1890

  1. Faulty shift control module
  2. Wiring issues
  3. Sensor malfunctions
  4. Internal transmission problems
  5. Low transmission fluid levels

Symptoms of P1890

  1. Erratic shifting behavior
  2. Harsh gear changes
  3. Transmission slipping
  4. Decreased fuel efficiency
  5. Illuminated check engine light

How to Fix P1890

  1. Retrieve the diagnostic trouble codes using a scan tool.
  2. Inspect the shift control module, sensors, and wiring for any faults.
  3. Test the transmission for proper operation and fluid levels.
  4. Replace any faulty components such as the shift control module or sensors.
  5. Clear the codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1890

The cost of repairing the P1890 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $600 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's best to check with local shops for a more accurate estimate.

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Code P1890 Information for Specific Makes

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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