Bad cat code?

Tiny
DGOLDENBERG1213
  • MEMBER
  • 2006 DODGE TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
06 Dodge 2500 power wagon, 5.7 Hemi 4x4
2 new oB2 CATS, 02 SENSORS TEST OK.

RE FLASHED AT DEALER, RE FLASH LASTS ABOUT 100MI, THEN CODE RETURNS.

should I replace downstream 02"s even though they test ok.

What else should I be looking for?
Thursday, September 15th, 2011 AT 2:57 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
What you need to do is have a live scanner hooked up to the vehicle while driving so you can see what is happening. It could be the O2 sensors, a wiring issue. With the scanner, it should identify what went wrong to set the light.
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Friday, September 16th, 2011 AT 1:34 AM

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