Two Codes... same problem?

[Haziness8]

i just recently used a full scan tool. it pulled out codes P0174 (which ive had for the longest time) and P0455 (something with the EVAP system). do these codes have any connection at all. i know p0174 is system too lean (bank 2)...i cleaned the MAF sensor, replaced all oxygen sensors, but not sure if there any leaks. please help guys thanks.

 

[Runnin'OnEmpty]

Sika, the codes are not related. The evap code is 'usually' caused from a faulty fuel filler cap, since it's a gross leak. Try that first. If that dosen't work, look for a loose or cracked evap hose, possibly at the EVAP solenoid above the spare tire.

The lean bank 2 is probably a leaking intake O-ring gasket on the driver's side. Very common. You might try snugging down the intake bolts on that side first. Might help.


Good luck,
ROE

 

[Haziness8]

where is this fuel filter cap?

 

[Runnin'OnEmpty]

Ha ha, fuel FILLER cap......it's the gas cap. This EVAP code shows up when the cap is left loose, so check the O-ring seal first. It may be broken/missing, and hopefully a new cap will fix it.

 

[Haziness8]

just checked the evap system. i found that a hose was disconnected, i fixed, reset the evap code via battery disconnect. i ill have to wait and see if the code pops back up.