Engine-Codes - Generic - P0899

P0899 - Transmission Control System MIL Request Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0899 Possible Causes

  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module (TCM) harness is open or shorted
  • Transmission Control Module (TCM) circuit poor electrical connection

How do I fix code P0899?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P0899 code

Labor: 1.0

The cost of diagnosing the P0899 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0899 Meaning

The Transmission Control Module (TCM) requests the Engine Control Module (ECM) to set the Malfunction Indicator Light (MIL). The ECM sets the OBDII code when the there is a problem communicating to the TCM through the MIL request circuit.

P0899 More Information

Need more information on how to fix the P0899 code?
Get Access to Factory Service Manuals

Need more help?

Get the P0899 code diagnosed by a professional: Find a repair shop in your area