Engine-Codes - Mercury - U1009 Mercury

U1009 Mercury Code - SCP Invalid Or Missing Data For Engine Torque

- Code Popularity: 1,970 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U1009 Mercury?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty / intermittent ignition module
  • J1850 / SCP Bus wiring intermittently open, shorted to power or ground
  • Faulty / intermittent connection at the Powertrain Control Module (PCM)
  • Faulty EGR Sensor

Code Tech Notes

This is typically an electrical wiring connection issue, either at the engine controller or at the sensors being monitored by the manufacturer.
It can occur if:
The wrong EGR sensor is installed on the vehicle. Verify with the manufacturer for the latest.
A bad ignition module is present.

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How to Fix the DTC U1009 Mercury?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the U1009 Mercury code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

When the PCM is unable to communicate with any other controller on the bus network at any time while the ignition switch is in the “Run” position.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Check Trac Light / ABS Light On
  • Bucks at highway speeds

What Does the U1009 Mercury Code Mean?

This is a manufacturer-specific fault code and can be used for several different faults, depending upon what the manufacturer wants to use it for. The Powertrain Control Module (PCM) communicates over the Serial Communication Protocol (SCP) bus network or J1850 bus. This is a medium-speed bus communication system and is fault-tolerant, which means any type of intermittent/loose connection at these controllers will cause this code to set in memory, but will still operate, provided a data path is available. When the PCM is unable to communicate with any other controller at any time while the ignition switch is turned on, code U1009 will set. This is the typical reason for this code to set.

U1009 Mercury Code - SCP Invalid Or Missing Data For Engine Torque

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