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Just for clarification, it's not the SCR control module itself that you'd be looking at. Are you using ISTA to read the codes? What exact codes?
What does the test plan say?
I'm looking to see where the heater would be located. It may or may not be part of the sprayer (aka 'metering unit').
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-2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs.
-2019 M2 Competition MT, Alpine White. Self-tuned 560hp
-2016 Mini Cooper S, MT. Many plans.
Others:
-E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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