Check Engine Light

Asked by Oct 31, 2015 at 09:45 AM about the 2008 Dodge Ram 1500 SXT

Question type: Maintenance & Repair

We have changed all four oxygen sensors first with OEM replacements.  
then we change the BCM  and light still comes on a day or two later it will go off.  When light is off,  17-18 mpg  when on about 13 mpg.   We changed PCM yesterday and had it set by Youngs Chrysler in Owosso Michigan.  Light came back on after 35 miles.

Can anyone help solve this mystery   Code reads when on" reading slow from side one to side two"

Thanks

1 Answer

7,260

No mystery ,,,It's probably the O2 sensor. Check the output of #2 sensor with OBD ... you should see about a half volt (.4vdc to 5.5vdc) If you are not in that range the Computer gives an alarm (CEL) and defaults the engine to a "Rich" setting. 4 sensors indicates to me that your mechanic is incompetent ... Duh ... what does he do when a fuse blows ??? keep changing fuses? Do you think the reason the O2's are triggering an alarm is because they are working ,,but the Catalytic converter is failing ??? Cats are not that expensive ... in fact if you spent what 4 O2's already cost you then you would almost have enough

Your Answer

Add photo

Related Questions

  • Check engine light 2 answers

    What is causing check engine light?

    1994 Dodge Ram 1500 2 Dr LT Standard Cab LB

    -

    Maintenance & Repair

  • why does my check engine light never come on 3 answers

    my check engine light does not come on when i start to crank my truck all other gauge lights come on anyone have any suggestion thanks i am getting a code p 1763 and p 1762 i know what these are but n...

    1998 Dodge Ram 1500

    -

    Maintenance & Repair

  • check engine light stays on 2003 1 answer

    after start up check engine light stays on

    2003 Dodge Ram 1500 SLT Quad Cab SB

    -

    Maintenance & Repair

  • why is my check engine light on? 2 answers

    my 1999 dodge ram 1500 runs great, but yesterday my check engine light came on whats up?

    1999 Dodge Ram 1500

    -

    Maintenance & Repair

  • Check engine light 2010 ram 5 answers

    Just done a tune up on my 2010 ram 1500 because of a miss in cylinder 5 now it will run perfect ecept when I accelerate then check engine light blinking loses power and flutters after letting off ...

    2010 Dodge Ram 1500 Laramie Quad Cab 4WD

    -

    Maintenance & Repair

Search Dodge Ram 1500 Questions

Dodge Ram 1500 Experts

#1 Dan Connell
Dan Connell
Reputation 5,420
#2 pudgybear
pudgybear
Reputation 5,160
#3 dandyoun
dandyoun
Reputation 4,810
View All

Related Models For Sale

Used Ford F-150
3,492 Great Deals out of 207,570 listings starting at $1,273
Used Chevrolet Silverado 1500
2,759 Great Deals out of 150,219 listings starting at $1,259
Used Dodge Ram 2500
179 Great Deals out of 5,708 listings starting at $2,900
Used GMC Sierra 1500
1,197 Great Deals out of 58,874 listings starting at $2,495
Used Toyota Tundra
699 Great Deals out of 28,803 listings starting at $2,500
Used Toyota Tacoma
805 Great Deals out of 34,292 listings starting at $2,988
Used Ford F-250 Super Duty
451 Great Deals out of 43,257 listings starting at $2,995
Used Dodge Charger
546 Great Deals out of 29,486 listings starting at $2,343
Used Dodge Dakota
156 Great Deals out of 4,409 listings starting at $1,500
Used Nissan Titan
246 Great Deals out of 14,699 listings starting at $4,200
Used Dodge Challenger
430 Great Deals out of 25,754 listings starting at $7,980
Used Dodge Ram 3500
100 Great Deals out of 2,479 listings starting at $5,000
Used Ford Mustang
719 Great Deals out of 39,136 listings starting at $1,000
Used Chevrolet Tahoe
1,086 Great Deals out of 32,099 listings starting at $1,495

Used Cars For Sale

2010 Dodge Ram 1500 For Sale
97 Great Deals out of 1,542 listings starting at $5,995
2009 Dodge Ram 1500 For Sale
63 Great Deals out of 1,220 listings starting at $5,495
2008 Dodge Ram 1500 For Sale
74 Great Deals out of 1,694 listings starting at $2,793
2007 Dodge Ram 1500 For Sale
86 Great Deals out of 1,644 listings starting at $3,995
2006 Dodge Ram 1500 For Sale
82 Great Deals out of 1,516 listings starting at $2,750