P430 code

140

Asked by Jan 27, 2015 at 11:57 AM about the 2007 Chevrolet Silverado 2500HD LTZ Extended Cab 4WD

Question type: Maintenance & Repair

Have 2007 2500HD 6.0 silverado ext. cab, check engine light on with P430 code, what can cause the P430 code other than the catalytic converters needs replaced?
Any help would be much appreciated

5 Answers

2,435

The causes could be: Three way catalyst converter Bank 2 Exhaust tube Intake air leaks Fuel injectors may be faulty Fuel injector leaks Spark plugs may be faulty Improper ignition timing Powertrain Control Module (PCM) Sometimes replacing the o2 Sensors may fix the code but usually the Catalytic Converter needs to be replaced. Although I would check these possible problems a Catalytic Convert is not a part that usually wears out and needing replaced usually a Rich Mixture or Misfire can create this problem.

2 out of 2 people think this is helpful.
140

Your reply is much appreciated, I have checked / fixed some of the causes you mentioned, hopefully I will find the problem without spending $1200 + on new Y-pipe and cats from the dealer.

2 out of 2 people think this is helpful.
2,435

Your very welcome. Good Luck!

140

JRKPerformax Once again I appreciate your time to help me with my issue. After testing everything you mentioned and not being able to clear the PO430 code, I finally change the catalytic convertors with OEM parts, after replacing the cats I erased the codes and drove the truck for cpu reset, engine light did not come back on and code reader did not read any other malfunctioning issues. I went to IL. emissions for test and passed. I do have another question, over the years I put additives in the gas IE: fuel injector cleaner products and other similar fluids, would this cause the cats to go bad? The truck is 2007 2500 HD 6.0 with 94000 miles? Thanks again for advice

2 out of 2 people think this is helpful.
2,435

I appreciate the Feedback. Over use of additives can shorten the life of a Catalytic Converter. The best thing is to do is regular maintenance and not use much fuel additives. Some people use Shell Gasoline because they have special additives already in the gas that doesn't affect the Catalytic Converter.

Your Answer

Add photo

Related Questions

  • WHY WILL THE CODE NOT CLEAR 4 answers

    I CHANGED THE O2 SENSOR HAD ON BOTH BANKS WENT HAVE CODE CLEAR BUT IT WILL NOT CLEAR WHAT CAN IT BE THANKS

    2006 Chevrolet Silverado 2500HD LS 4dr Crew Cab 4WD SB

    -

    Maintenance & Repair

  • what does this code mean ? 1 answer

    airbag light on and i got this code on dtc Driver Frontal Deployment Loop Stage 1 Open Circuit what does this mean ?

    2008 Chevrolet Silverado 2500HD

    -

    Maintenance & Repair

  • How do you get ignition codes to display/Flash on 2003 Chevy Silverado 4 answers

    Hello! Was wondering how to get the ignition codes to display/flash for a 2003 Chevy Silverado. Been looking in the Chilton manual and online & can't seem to find anything for that year. Thank you for...

    2003 Chevrolet Silverado 2500HD 2 Dr LS 4WD Standard Cab LB HD

    -

    Maintenance & Repair

  • 2001 1 answer

    Engine light with misfire code

    2001 Chevrolet Silverado 2500HD LT Crew Cab

    -

    Maintenance & Repair

  • what does code t/c 4 answers

    my code light with a t/c came on. Any idea

    2013 Chevrolet Spark

    -

    Maintenance & Repair

Silverado 2500HD

Looking for a Used Silverado 2500HD in your area?

CarGurus has 26,762 nationwide Silverado 2500HD listings starting at $1,250.

ZIP:

Search Chevrolet Silverado 2500HD Questions

Chevrolet Silverado 2500HD Experts

#1 Steven Loeffler
Steven Loeffler
Reputation 460
#2 Tom Demyan
Tom Demyan
Reputation 270
#3 piocon
piocon
Reputation 260
View All

Related Models For Sale

Used GMC Sierra 2500HD
110 Great Deals out of 14,582 listings starting at $2,650
Used Ford F-250 Super Duty
354 Great Deals out of 47,410 listings starting at $1,795
Used Chevrolet Silverado 1500
1,738 Great Deals out of 167,240 listings starting at $1,800
Used Dodge Ram 2500
138 Great Deals out of 5,278 listings starting at $2,500
Used Chevrolet Silverado 3500HD
145 Great Deals out of 8,316 listings starting at $5,195
Used GMC Sierra 1500
821 Great Deals out of 66,133 listings starting at $1,995
Used Ford F-150
2,229 Great Deals out of 208,159 listings starting at $1,499
Used Ford F-350 Super Duty
369 Great Deals out of 26,698 listings starting at $3,000
Used Chevrolet Silverado 1500HD
14 Great Deals out of 264 listings starting at $3,950
Used GMC Sierra 3500HD
49 Great Deals out of 4,116 listings starting at $8,000
Used Toyota Tundra
472 Great Deals out of 33,092 listings starting at $3,400
Used Chevrolet Silverado Classic 2500HD
25 Great Deals out of 379 listings starting at $4,790
Used Dodge Ram 3500
83 Great Deals out of 2,140 listings starting at $5,250

Used Cars For Sale

2017 Chevrolet Silverado 2500HD For Sale
14,718 listings starting at $25,191
2016 Chevrolet Silverado 2500HD For Sale
27 Great Deals out of 2,635 listings starting at $25,900
2015 Chevrolet Silverado 2500HD For Sale
40 Great Deals out of 1,859 listings starting at $18,500
2014 Chevrolet Silverado 2500HD For Sale
11 Great Deals out of 500 listings starting at $10,377
2013 Chevrolet Silverado 2500HD For Sale
4 Great Deals out of 954 listings starting at $7,200