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1997 Dodge Ram ODB-II codes

Tiny
RKBURNETT
  • MEMBER
  • 1997 DODGE RAM
  • V8
  • 4WD
  • AUTOMATIC
  • 17,500 MILES
I recently had my 360 engine rebuilt for performance by stroking it to a 408. Ever since the rebuild I have been throwing P0331 computer code. What could be causing this?
Thursday, October 16th, 2008 AT 4:20 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
See below


https://www.2carpros.com/forum/automotive_pictures/12900_ks_7.jpg

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Thursday, October 16th, 2008 AT 4:49 PM
Tiny
RKBURNETT
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  • 4 POSTS
I see you attached a screen shot of a diagnostic tool showing P0331 code, however this does not answer my question about what could be causing the code to be thrown?
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Thursday, October 16th, 2008 AT 4:57 PM
Tiny
RASMATAZ
  • MECHANIC
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That code applies to the knock sensor its job is to retard the ignition timing when the engine starts to detonate/ping-
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Thursday, October 16th, 2008 AT 5:40 PM
Tiny
RKBURNETT
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  • 4 POSTS
Understood, however I called the dealership and 1997 dodge ram 2500 does not have a knock sensor?
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Thursday, October 16th, 2008 AT 5:43 PM
Tiny
RASMATAZ
  • MECHANIC
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I was just fixing to tell you that-after looking over in the auto references it shouldn't give that code-try clearing it again and see what happens-

I've puilled that code in my scantool which I installed into my PC for quick references-
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Thursday, October 16th, 2008 AT 5:49 PM
Tiny
RKBURNETT
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I have reset the code many times and it keeps coming back after about 15 miles of driving. If it helps P0300 and P0303 come with it on occassion but not all the time. The engine runs great but the check engine lite concerns me and I am worried about passing an emission test with these codes.
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Thursday, October 16th, 2008 AT 5:57 PM
Tiny
RASMATAZ
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Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

A Random Misfire code P0300 usually indicates a vacuum leak or bad gas.

If a misfire in a specific cylinder should lead you to check the spark plug, fuel injector and compression for that cylinder
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Thursday, October 16th, 2008 AT 6:01 PM

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