Hello i have a s2k 04 ap2 when i start the engine the air pump start and the goes of after 5 sek end the engine light start. and i gott cod P0135. i have replace the 02 sensor but nothing happend.I have trobleschoot the sensor whit out result

 

You've got a issue with the primary 02 sensor heater circuit, not the air pump. Did you install a new Honda sensor?

 

Yes i have.

 

Can i have a bad ecu?

 

Did you clear the CEL after the install of the new sensor? You have to reset it. Pull the back up fuse for the ecu for a minute or two and then put it back in

 

Check the vacuum line that goes to the valve. Mine had popped off and the valve wasn't opening to let the air from the pump through.

 

you = Im not reading this thread.

 

if i clear the CEl and only have the ignition switch on 2 the engine light flash 5 times then it goes of.

 

i had a bad air pump on my 04, it just ran on after shutting off the engine and then got a cel....i went to dealer who replaced it out of warranty for just the cost of labor.

 

But did you have the cel P0135??