Emissions failure - Help Diagnosing
Posting Guru
Joined: May 2012
Posts: 1,758
Likes: 3
From: Colorado
What Vwags said. Check the in and out temps. Outgoing temp should be higher than ingoing by quite a bit due to the chemical process.
If your truck is not obd2 (check sticker under the hood) this will never be detected by the onboard hardware.
obd2 trucks have an o2 sensor after the cat which would indicate a malfunction if there was one..
If your truck is not obd2 (check sticker under the hood) this will never be detected by the onboard hardware.
obd2 trucks have an o2 sensor after the cat which would indicate a malfunction if there was one..
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Laughing Gas
Joined: Dec 2006
Posts: 1,008
Likes: 5
What Vwags said. Check the in and out temps. Outgoing temp should be higher than ingoing by quite a bit due to the chemical process.
If your truck is not obd2 (check sticker under the hood) this will never be detected by the onboard hardware.
obd2 trucks have an o2 sensor after the cat which would indicate a malfunction if there was one..
If your truck is not obd2 (check sticker under the hood) this will never be detected by the onboard hardware.
obd2 trucks have an o2 sensor after the cat which would indicate a malfunction if there was one..
As it was stated here, only California tricks have the downstream O2 sensor.
Logistics Pro
Joined: Jan 2007
Posts: 3,836
Likes: 106
From: Martinsburg, WV
Over 8500k it's more of a blend of I and II, some sensors are in a permanent not ready state because they simply aren't there. It does have an OBDII port. It can really confuse the uneducated "techs"...
Posting Guru
Joined: May 2012
Posts: 1,758
Likes: 3
From: Colorado
Not the excursions due to the higher GVW rating. Only California and some other models are obd2 I think. Sticker under the hood will tell you.
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