Question about 2006 Cadillac DTS
HAD FUEL PUMP CHANGE BUT MY SERVICE ENGINE LIGHT CAME BACK ON SHOWING SAME CODES
Posted by Anonymous on
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Posted on Jan 02, 2017
bank 1= The cylinder bank with the # 1 cylinder or the cylinder bank that is offset forward. the 1 cylinder is the furthest offset forward cylinder. you could also have an air leak in the intake.
Posted on Jun 18, 2009
SOURCE: service engine light comes on
I had the exact same problem on my 1997 Cadillac Deville Limousine with the 4.6L Northstar engine.
Changed the O2 sensor, and the problem seems less frequent, now. If the Service Engine Soon light comes on, try to clear it and see how long it takes for it to come back.
If you purchase an obd-II compliant scanner, it will have an 'erase code' button on it.
The engine scanner in question costs less than $100 these days, and covers 1996 to 2005 vehicles, so you're sure to use it on other vehicles, in the future.
Try Sears, Walmart, or your local auto parts store for purchase details.
Since you are having the same problem I had, it may be a problem that is common to occur on the 1997 Deville with the Northstar engine. :)
Posted on Jan 19, 2011
Wow! I wish I had a dollar for every time I have heard this. I would be a RICH man! Please READ the article below to get a better understanding of what is going on:
What Else Could Be Wrong?
After reading the article, maybe you will understand that "lean oxygen sensor" codes are RARELY the fault of the oxygen sensor. When they are, it is HIGHLY UNLIKELY that BOTH upstream oxygen sensors would be defective at the same time. You probably have a large vacuum leak or a bad mass airflow sensor. Proper diagnosis required.
Posted on May 16, 2012
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Fuel Trim Bank Two Condition
- The ECM has detected a rich or lean air/fuel ratio condition on engine bank two
Fuel trim bank one condition
- The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
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