1998 Honda Odyssey 4 cyl Front Wheel Drive Automatic 130000 miles
This is basically the same engine as a 1998 honda accord. I had the check engine light come on and Autozone told me it was a P0135 and that I needed a new oxygen sensor. I purchased a Bosch direct fit and had it in without trouble. But. The check engine light remained. I took it to Autozone to have them clear it to no avail. It came right back on. I went home and double checked everything. No loose or burnt wires. Connector snapped on tightly.
Googling the code, I've come to realize that the code is specifically for " Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)". This vehicle only has two O2 sensors and I verified that I had in fact replaced the one before the Cat.
This leads me to believe that the problem is in the circuit away from the O2 sensor. I know that there is a relay that provides power to the O2 sensor but it also provides power to the other O2 sensor and a couple of other sensors.
I might check for voltage in the wires tomorrow, but I'm pretty sure I know what I'll get. (I'll have to clamp the wires while a friend turns the key to on.)
Ideas on which relay to check? Which one is it?
Any other ideas?
Monday, July 14th, 2008 AT 11:13 PM