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  • FAQ

2000-2003 Infiniti QX4 ECM / ECU Repair

  • 2000-2003 Infiniti QX4 ECM / ECU Repair
  • 2000-2003 Infiniti QX4 ECM / ECU Plugs
1-business day turnaround service


  1. How This Works
  2. Instructional Information
  3. Part Numbers
  4. Warranty
  5. Reviews

Product Description

This is a repair service that corrects the Infiniti QX4 P0505 Diagnostic Trouble Code on your 2000, 2001, 2002, or 2003 Infiniti QX4 ECM (engine control module). The ECM is also commonly referred to as the computer or ECU (engine control unit). This error code can often cause the following problems:

  • No start, hard start
  • Engine stall
  • Rough idle, high idle, erratic idle

If you do not have a P0505 or are having problems other than these, do NOT send your unit without contacting us first at 800-547-2049

NOTE: The Idle Air Control Valve on the vehicle MUST be replaced with an OEM (Hitachi brand) IACV prior to reinstallation of the ECM, or immediate damage to the computer will occur!!

Wondering How This Repair Service Works?

At Circuit Board Medics, our focus is on quality repairs, fast turnaround, and excellent communication. One key to achieving these goals is ensuring that we have customers' contact information and payment before beginning any repair order. Watch our video to learn more about how our repair process works and how we can help to get your vehicle or appliance back up and running quickly. Disclaimer: We are not responsible for lost, delayed, or non-repaired items shipped to our facility without an order number.


Our no-hassle warranty covers your repair for a full year. If the repair fails anytime within a year, we will repair the item again. In the rare occasion that the item is not repairable, we will either replace the circuit board entirely or refund the cost of the repair, at our discretion. See Details...

Product Reviews