I downloaded INPA (a one-week endeavor in itself) and based on advice all over the forums I built a windows XP machine to run the software. Without question the hardest part of the E46 DTC job was the final part - coding the steering angle sensor. I bought my 2002 E46 325 one year ago with the trifecta on the dash, knowing that it had an issue, but the PO never mentioned to me the $3k estimate he'd received from his local dealership to replace the DTC system completely, which is what I ended up doing - a three-month DIY journey down the trifecta rat-hole that involved cross-country salvage yard searches, ABS pump autopsies, Windows XP laptop builds, questionable software downloads from the cloud, and extremely descriptive strings of cuss words shouted into the night (ask my neighbors). I'm super curious how he/she got the light to remain off until two weeks after the sale.Īnd this is now the second BMW in a row that I purchased where the PO got rid of the car due to a DTC issue. Hmmm.I guess now I know why the PO traded the car in.

The DTC warning light description referred me to page 81, which was about the DTC system in general. The lights now come on immediately after starting the car - I can hear the faint hum of a DTC test every ten seconds or so in the upper-left part of the dash (likely the pump engaging).Īnyway, I knew what the lights meant, but pulled out the manual just to verify. Just out of the driveway the dash lit up with the yellow brake warning light and the yellow DTC malfunction warning light (just one shy of the dreaded trifecta). This morning I discovered a new item to add to the used car inspection checklist - the owners manual. I'm combining two separate but related issues into one thread, which I may end up regretting. TLDR2: Looking for best diag/code tool for my E82 N55 that will also work for my E90 N54. TLDR1: Need to diagnose a DTC malfunction

Bmw e90 clear dtc inpa