Can ECU re-mapping be detected?

Tuners normally claim that their re-maps are undetectable. Is it true?

Think for a second before you proceed if your car is still under warranty - is there any tuner braves enough to provide a written guarantee that the re-map is 100% undetectable and if it is detected and the car warranty is void will he bare the repair bill if proven the damages are due to improper re-mapping?

Of course re-mapping does not involve any physical change to the engine and it will not be apparent on first-glance that your car is re-mapped but it is relatively easy to find out by comparing the contents of the ECU with a standard one - i.e by verifying the checksum. Besides that ECU has a counter hidden away to count the times it's been flashed.

Re-mapping may NOT be undetectable.  So, if you want to keep your warranty you shall not re-map the car ECU before the warranty expires.

DIY re-mapping. Anyone?
"FlasherTHP"/"LionHEART" by eTuners is the solution for  Peugeot THP owners who prefer DIY. This is actually a 2-in-1 "low-cost" software [Diagnostics and Flasher] specially developed to read and flash Peugeot and other cars powered by THP Engines [EP6-DT*]- that let us choose the right "firmware" we would use on our car.



It would also able to be used in diagnosis and fault-finding, in case things would start going wrong rather than keep on changing the "firmware" by trial-and-error without solving the root of the problems.

Happy DIY and Motoring.