Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › ’04 Honda Element – code p0721 after engine swap › ’04 Honda Element – code p0721 after engine swap
October 16, 2019 at 5:37 pm
#895101
[quote=”Doug” post=203606]what actually fixed mine was: there are two identical sensors on the the back side (between the trans and the firewall/ attached to the trans) that have the same identical connection. I had those two connections swapped and didn’t know it. i swapped the two and it fixed everything.
hope this helps.[/quote]
An end to the mystery scooby doo