I have an acessport with several other mods, intake, boost tube, forge dv, and I'm running no muffler so just the resonator plus both cats. Well my car is throwing codes on my acessport. I've searched around and know that one of them is super knock but it's not clear what te rest are. What I want to know is a definite cause and solution to fix these codes because they shouldn't just be ignored right? The codes are:

P2d52
P2dcc
P2dcd

Please help!

 

What happens when you reprogram the original OEM tune on the ECU?

 

I haven't tried putting back to stock but, I had at least super knock b4 the ecu tune tho, my buddies code reader picked them up on some fancy $2000 diagnostic tool.

 

Super knock could mean a bad fuel, i.e. that junk with 10% ethanol. Or could be fuel pump and/or injector related. Worst case, the infamous carbon build up issue.

 

So would you suggest a sea foam treatment to get get of the carbon? Open to try anything.

As far as gas goes it's 93 octane only for me but almost everything has ethanol in it.

My injectors have always been loud, like ticking like an e30 but it's been that way since new.

 

Seafoam will clean some of the carbon out but the best way is to visually inspect the intake ports and clean manually if needed. Even that still doesn't address what crud you have in the combustion chamber. Adding Seafoam to the gas tank can help with that.

 

My car bogged down while driving on the fwy from work today. Checked and I also got codes P2DCD and P2D52.

I noticed the coolant reservoir was down to the minimum. After letting it cool down I opened it and it overflowed back up. Let it settled and now the reservoir is empty. Last time this happened, they replaced the thermostat which was back in May of this year.

Are both codes related to the thermostat? Could it be the fuel pump? This was also replaced back in May 2011.

BTW, the motor was replaced with a refurb Sept 2011 so I doubt carbon build up would be the cause?!?!

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Nah all the codes I had were related to Super Knock Max and can be resolved by sea foam and a oil catch can.