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AutoCodes - Mercury - U300C MERCURY

U300C MERCURY Code - Ignition Input Off/On/Start

- Code Popularity: 1,354 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Updated Jun 18, 2020
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|U300C MERCURY code possible causes

  • Ignition Input Off/On/Start (ISP-R) harness is open or shorted
  • Ignition Input Off/On/Start (ISP-R) circuit poor electrical connection

|How do I fix code U300C MERCURY code?

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 U300C MERCURY code

Labor: 1.0

The cost of diagnosing the U300C 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 U300C MERCURY code possible symptoms?

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

|U300C MERCURY code description

The Powertrain Control Module (PCM) monitors the ignition key state. The U300C code sets when the key state is not available.

OBDII Code U300c Mercury - Ignition Input Off/On/Start -
Ignition Input Off/On/Start

|Need more information with the U300C MERCURY code?

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|Need help with a U300C MERCURY code?

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|U300C MERCURY code comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U300c Mercury code? Have you replaced any parts?
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