Rick's Free Auto Repair Advice

Posts Tagged: FLASH update

What is a PCM/ECM FLASH update?

Understanding a PCM/ECM FLASH update Car makers issue a FLASH update when they discover a software bug that can set a false trouble code or cause performance issues. Once they’re aware of the problem, they re-write the software to correct the mistake. Then they issue a service bulletin to dealers and independent shops informing them of the availability of new software that fixes the problem. Referring to the service bulletins BEFORE performing diagnostic work can save the shop a lot of wasted effort. It avoids replacing perfectly good parts that … Read More


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