2008 XC90 3.2 P0442 & P0037

MrBreeze · Post by **MrBreeze** » 18 Mar 2019, 20:08

Just picked up a nice 08 XC90 3.2 AWD with only 99K

Throwing 2 codes

P0037 HO2S Heater Control Circuit Low Bank 1 Sensor 2
P0442 Evaporative Emission system Leak detected (small leak)

Have read lots of posts on P0442, that looks like a wild goose chase, but will start with gas cap & J Hose inspections.

Will most likely just throw a new O2 sensor on to attack the P0037 code

Most of the posts I have read related to 2.5T engines, anyone with a 3.2 experience these codes?

MrBreeze · Post by **MrBreeze** » 06 Apr 2019, 20:15

Follow up.....

P0037 was corrected with new Densor O2 sensor, Bank 1 Sensor 2 was passenger side down flow sensor, tested old sensor no reading on the ohm meter, after replacement with new sensor code was gone.

P0442 - decided to replace J Hose since 90% of the time that is the culprit. Pulled old hose, barely a crack, not sure it was enough to trip a code, but replaced with new hose and code is gone.

MrBreeze · Post by **MrBreeze** » 04 May 2019, 06:21

P0442 is back, seems to happen after getting gas, so will replace gas cap next, if that does not solve it, will smoke test it.