I know i didnt fry the diode, i rebuild electronics all the time. I ran the OBD again this morning and now it says no codes but the check engine light is still on. I DROVE 200+ miles after putting the diode in place and the light never came on till i was warming the car up yesterday. It came on duri...

I have a 98 v70 I soldered the diode between 32 and 37 drove 200 miles...no code. Hooked up the obd no code....just started the car and let it idle for 15 minutes to warm up and I guess the pump is used most while idling and the check engine light came on. I didnt remove or disconnect anything for t...