Emissions

Tiny
CORY2427
  • MEMBER
  • 2006 DODGE DAKOTA
  • 3.7L
  • 6 CYL
  • 4WD
  • 98,634 MILES
Truck engine light will come on for a week or couple days then go off for a while then back on. Advance read the code and said it could be vapor canister or vapor solenoid or filter but when you look it up online it shows fuel injectors or o2 sensor or catalyst converter spark plugs. What is it really?
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Tuesday, October 30th, 2018 AT 11:14 AM

12 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good afternoon.

Lets start with the code number?

Give me the number and I will get the information for you.

Roy

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons
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Tuesday, October 30th, 2018 AT 11:30 AM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
Po430
Catalyst system efficiency below threshold bank 2.
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Tuesday, October 30th, 2018 AT 11:33 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Okay, that codes indicates a failed cat converter for bank 2.

You need a new converter. I attached some possible parts for you to view. The catalytic converter is one assembly that contains both cats. One for bank 1 and one for bank 2.

Roy

430

P0430
Descriptor
Catalyst Efficiency (Bank 2)
Probable Causes
(K902) Oxygen Sensor (O2S) Return Upstream Circuit Open
(K902) Oxygen Sensor (O2S) Return Upstream Circuit Shorted to Ground
Catalytic Converter
Engine Mechanical Condition
Engine Mechanical Problems
Exhaust Leak
Oxygen (O2) Sensor
Oxygen Sensor (O2S) Deterioration
Oxygen Sensor (O2S) Return Downstream Circuit Open
Oxygen Sensor (O2S) Return Downstream Circuit Shorted to Ground
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Tuesday, October 30th, 2018 AT 11:47 AM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
So I need a catalytic converter not the list of parts you sent me about o2 sensors stuff.
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Tuesday, October 30th, 2018 AT 12:06 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
That is not a list of parts, it is possibilities only.

If you do not have an exhaust leak, then it is the catalytic converter. Roy
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Tuesday, October 30th, 2018 AT 12:08 PM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
Which side is bank 2?
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Tuesday, October 30th, 2018 AT 12:10 PM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
How do I find exhaust leak and where would it be?
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Tuesday, October 30th, 2018 AT 12:12 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
If you had one, it would be loud.

To find it, have someone hold there hand over the exhaust pipe at the rear with a rag in there hand and look for a rush of air. That will be the leak.

Roy
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Tuesday, October 30th, 2018 AT 12:16 PM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
It is not loud but people have told me it sounds like a exhaust leak, but not really sure I understand. If there is air that comes out exhaust all the time how would you tell if rush air comes out?
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Tuesday, October 30th, 2018 AT 12:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You need to get under the truck with it running and someone blocking off the exhaust at the rear. Look, feel and smell for the leak. You need to get up and close.

Roy
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Tuesday, October 30th, 2018 AT 12:23 PM
Tiny
CORY2427
  • MEMBER
  • 293 POSTS
Okay, would it burning oil cause catalytic converter to go down?
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Tuesday, October 30th, 2018 AT 12:25 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, it will not. They usually last about 100,000 miles and they wear out.

The only other factor is a poor running engine with misfires. That melts the internals but you would have complained about other engine related codes.

Roy
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Tuesday, October 30th, 2018 AT 12:32 PM

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