Diagnostic Trouble Codes Can Quickly Identify Issues | ModuleExperts

There are common symptoms your vehicle will exhibit when things are out of sync. Typically, there will also be one or more Diagnostic Trouble Codes (DTCs) once the vehicle has been scanned.

What is a Diagnostic Trouble Code (DTC)?

Diagnostic Trouble Codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. They are stored in response to a problem found in the vehicle by the system and when a sensor in the vehicle reports a reading that is outside the normal/accepted range (e.g. fuel mixture too rich).

Trouble Codes Are Subdivided into Four Basic Categories:

  • Powertrain (“P”) codes (engine, transmission and emissions systems)
  • Body (“B”) codes (climate control system, lighting, airbags, etc.)
  • Chassis (“C”) codes (antilock brake system, electronic suspension and steering systems)
  • Network Communications (“U”) codes (controller area network wiring bus and modules)


P0351, P0352, P0353, P0354, P0355, P0356. Powertrain Control Module (PCM) damaged by a failed coil pack (Coil on Plug).

2004-2006 Ford Escape, Mercury Mariner, also Mazda Tribute

2007-2009 Ford Edge, Lincoln MKX

2006-2008 Ford Fusion, Mercury Milan, Lincoln Zephyr

2005-2009 Ford Taurus, Mercury Sable


Call the experienced professionals at ModuleExperts if your vehicle has any of these Diagnostic Trouble Codes (DTCs). Our knowledgeable and experienced Parts Associates will be happy to provide information on the best and quickest solution so you can get back on the road faster.

ModuleExperts brings more than 100 years of combined experience in module diagnostics, repairs and remanufactured replacements for all types of control modules. Our A+ BBB rating proves our commitment to first-class customer service and satisfaction. Contact us today to learn more about how we can help service your control module needs.