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Will it still pass inspection? Car now having performance issues, rough idling, no power, limped to the garage with top speed of 40 mph. Drove it almost 750 miles the day before, check engine light came on again early in the trip, same P2459 code.

What is being deleted, and how is it done? Getting a MIL with a P2459 code, diesel particulate filter regeneration frequency. No performance issues, no black smoke. Unfortunately about 7k outside of warranty. Thanks!

Dropped in a new Interstate battery, bit bigger than the original (which had the yellow dot next to the battery picture with an X through it, and it was an Enertec). Couple of error codes that disappeared after driving it a short distance. Problem now is the engine light is on. Will that...

Did you have the other strange problems, too, or just not cranking?

I was leaning toward replacing the battery, especially since it's the original one that came with the car when I bought it new six years ago. After over 125k, I guess I should expect some things to wear out. Thanks!

Went to start my 2015 Golf TDI SE today, and it barely cranked once or twice and then stopped. Engine light is on while the key is still on. Ran fine two days ago, no issues except did take a few cranks more than usual to start once. Weirdness is that the interior fan was still on even after the...