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AutoCodes - Mercury - U210B Mercury

U210B Mercury Code - Lost Communication Between Fuel Pump Control Module 'A' and Restraints Control Module

- Code Popularity: 1,228 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jun 15, 2020
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|Code U210B Mercury Possible Causes

  • Event Notification Signal (ENS) harness is open or shorted
  • Event Notification Signal (ENS) circuit poor electrical connection
  • Radio frequency interference or electromagnetic interference
  • Faulty Restraints Control Module (RCM)
  • Faulty Fuel Pump Control Module

|How do I Fix the Code U210B 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's pins.

Does your Mercury have Safety Recalls? → Check here

|Code U210B Mercury Tech Notes

Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems. The Event Notification Signal (ENS) is used to notify the fuel pump control module of an event requiring the fuel pump to be disabled. This signal is used instead of an Inertia Fuel Shutoff (IFS) switch. The fuel pump control module monitors the ENS signal by sending a 12V low current signal on the ENS circuit to the Restraints Control Module (RCM).

|What is the Cost to Diagnose the Code U210B Mercury?

Labor: 1.0

The cost of diagnosing the U210B Mercury code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code U210B Mercury Possible Symptoms?

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

|Code U210B Mercury Description

The Fuel Pump Control Module monitors the duty cycle and frequency of the signal it receives from the Restraints Control Module (RCM). The fuel pump control module determines if the signal on the Event Notification Signal (ENS) circuit from the RCM is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module sends a 40% duty cycle signal on the Fuel Pump Monitor (FPM) circuit to report the concern to the Powertrain Control Module (PCM). The test fails when the fuel pump control module is still reporting that it is receiving an invalid duty cycle or frequency from the RCM after a calibrated amount of time.

OBDII Code U210B Mercury - Lost Communication Between Fuel Pump Control Module 'A' and Restraints Control Module -
U210B Mercury Code - Lost Communication Between Fuel Pump Control Module 'A' and Restraints Control Module

|Need More Information on the U210B Mercury Code?

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|Need Help with the U210B Mercury Code?

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|Code U210B Mercury comments

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