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P1899 Chevrolet Code - Axle Torque Secondary Signal Message Counter Incorrect

Quick Answer

The P1899 code is specific to certain Chevrolet vehicles and indicates a problem with the axle torque secondary signal message counter. Common causes include Faulty axle torque sensor or related components, Damaged or corroded wiring and connectors in the transmission system, Malfunctioning 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
P1899 Chevrolet indicates Axle Torque Secondary Signal Message Counter Incorrect.
Common causes
Common causes include Faulty axle torque sensor or related components, Damaged or corroded wiring and connectors in the transmission system, Malfunctioning 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.
What is this?
Table of contents Created and updated by William Orellana on Jun 18, 2025
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Code P1899 Chevrolet Description

The P1899 code is specific to certain Chevrolet vehicles and indicates a problem with the axle torque secondary signal message counter. This code is generated when the Engine Control Module (ECM) detects an inconsistency in the communication between the transmission control module (TCM) and the ECM regarding the torque output from the axle. The axle torque signal is crucial for the proper functioning of the vehicle's transmission and overall drivetrain performance. When the signal is incorrect, it can lead to improper shifting, reduced fuel efficiency, and even potential damage to the transmission over time.

OBDII Code P1899 Chevrolet - Axle Torque Secondary Signal Message Counter Incorrect
P1899 Chevrolet Code - Axle Torque Secondary Signal Message Counter Incorrect

Common Causes of P1899 Chevrolet

  1. Faulty axle torque sensor or related components.
  2. Damaged or corroded wiring and connectors in the transmission system.
  3. Malfunctioning transmission control module (TCM).
  4. Software issues within the ECM or TCM that require reprogramming.
  5. Mechanical issues within the transmission that affect torque output.

Symptoms of P1899 Chevrolet

  1. Harsh or erratic shifting of the transmission.
  2. Slipping transmission, where the engine revs without corresponding acceleration.
  3. Decreased fuel efficiency due to improper gear engagement.
  4. Illuminated check engine light on the dashboard.
  5. Unusual noises from the transmission, such as grinding or whining.

How to Fix P1899 Chevrolet

  1. Diagnostic Scan: Start by using an OBD-II scanner to confirm the P1899 code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Conduct a thorough visual inspection of the wiring and connectors related to the axle torque sensor and transmission control module. Look for signs of wear, corrosion, or damage.
  3. Sensor Testing: Test the axle torque sensor for proper operation using a multimeter. Replace the sensor if it is found to be faulty.
  4. Wiring Repair: If damaged wiring or connectors are identified, repair or replace them to ensure proper signal transmission.
  5. Reprogramming: If the ECM or TCM is suspected to have software issues, reprogramming may be necessary to restore proper communication and functionality.

Cost to Fix P1899 Chevrolet

The cost to repair the P1899 code can vary widely depending on the specific cause of the issue. On average, you might expect to pay between $150 and $600 for repairs. This estimate includes parts and labor, with the labor costs typically ranging from $80 to $150 per hour. Factors such as the vehicle's make and model, the complexity of the repair, and the local labor rates will influence the final cost. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer more competitive pricing. It is advisable to consult local repair shops for a more accurate estimate based on your specific situation.

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Information for Specific Chevrolet Models

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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