p0138

[2000r\t]

So i'm driving around today and my engine light comes on, so i decide to check the codes and p0138 comes up. I have no idea what this means. Now my engine light as come on once or twice before, but it goes out after a day or 2. The truck is running just as good as before. So i have no idea why this code is coming up and why my engine light is on?

[BryanRT360]

P0138 (M) 1/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.

When i got that code i replace my sensor and all was good

[2000r\t]

ok, like i said it on;y come on then goes away for a few months then comes up again. is it a big issue?

[BryanRT360]

I would think it could cause a rich condition

[2000r\t]

ya, so i should just be able to order it at an ordinary parts store?and are they costly?

[BryanRT360]

www.oxygensensors.com

[2000r\t]

thanks alot for your help

[2000r\t]

oh one more thing, is it pre or post cat

[BryanRT360]

not sure on that one. on mine it was the post cat but mines an 02 I have 4 sensors. I'm not sure bout the 2000's iirc they were an odd ball

[2000r\t]

ya i no i only have 2, one pre and post, one should send a different code then the other though right

[BryanRT360]

ok post cat than

[2000r\t]

thats the one i was kinda leaning towards to. thanks alot for your help. is there a website out there that i can go to to find out what the codes i get mean, instead of bothering everyone on the forum

[BTLFED R/T]

I would replace them both, just to be safe.

All the codes are on this forum in the FAQ section. ;)

[oogieboogieX]

you can look up 'OBD 2 codes' on Google and you'll likely find a website with a list...

if you live in around Toronto/Hamilton/London/Barrie, you could check out Princess Auto... friend of mine just picked up an OBD II code reader tool there for about $50... my older version only displays the code, but his reads out the code on screen... both come with a hard copy book which also lists common and manufacturer specific codes...

[BryanRT360]

I would replace them both, just to be safe.

All the codes are on this forum in the FAQ section. ;)

the post whore has finally arrived, wtf took you so long:nana:

[2000r\t]

ok thanks alot guys.