fellas.........


got a code today (my first) after washing the car, and it came up as

"p0491" and "p0492"

car ran fine, but i cant seem to figure it out....

i believe it is related to the "secondary air source; L and R bank".....

can anyone help me understand this better (before a dealer trip is in order???)


i did a battery-reset and the code cleared, but i can't be sure it wont come back (or why it did in the first place)

much thanks

-ese

 

SELF-REPLY No.213A

welp, i found a slice in the (aft) vac. line coming from my evo d/v....

it was just staring at me - defiantly.........

i replaced the line (from the backside of the tee) and am gonna drive her sometime tomorrow...

thanks for the support, Marc S........

will keep you all posted........

ese

 

Diagnosis conditions

- Intake air temperature 4.5 - 60 °C

- Engine temperature 4.5 - 102 °C
- Mass air flow 36 - 150 kg/h
- Engine starting temperature less than 42 °C
- Altitude correction factor greater than 0.75
- Oxygen sensors 1 and 2 ahead of TWC are ready for operation
- The secondary air injection pump is switched on
- Diagnosis has not yet taken place during this cycle

Possible fault cause
- Secondary air injection pump is not triggered
- Secondary air injection pump does not work
- Air supply lines restricted
- Electric change-over valve does not function
- Air change-over valve does not function
- Vacuum system leaking

Affected terminals

III/11 and III/14

 

Excellent info, ZIPP.........

thanks for the data; (where the heck do ya find it, anyway??)

crossing fingers that i've solved it........ (will know better after a longer drive today or this weekend)

will report back!

-ese

edit:: rep added!