Yes, I disconnected the battery while switching the ECU out. I put the old one back to see if it would work and it did. Do I need to have the new ecu reprogrammed? When I ordered the new ecu I was told this should be a plug and play type of install but when I switched them and turned the key all the normal dash lights came on but it did not do anything else. Just flash the check engine light.
Saturday, December 14th, 2019 AT 7:42 PM