Question about Chevrolet Silverado 1500

1 Answer

Code P0430 Catalyst Efficiency below threshold (bank 2)

I have a 1998 Chevy Silerado 1500 and I just installed new plugs, wires, disrtiburator cap and rotor and the truck runs great! I just got the check engine soon light and the ODB II scanner calls out error P0430 - Catalyst Efficiency below threshold (Bank 2). What is wrong? Thanks much John Johnk_56@hotmail.com

Posted by on

  • 1 more comment 
  • johnk_56 May 11, 2009

    Thanks, I'll have to figure out which one and replace it.

  • johnk_56 May 11, 2009

    Can you clean them or just replace it?

  • Anonymous Mar 26, 2014

    CODE P0430 WITCH BANK 2 CAT DO I CHANGE

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,559 Answers

One of your O2 sensors is showing as bad.

Posted on May 11, 2009

  • Randy Hough
    Randy Hough May 12, 2009

    You'll need to replace it,But bank 2 is the rear one.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Bmw x5 4.4i code p0430


p2187 system too lean bank 1
p2189 system too lean bank 2
p0430 catalyst stem efficiency below threshold bank 2

You have some air leak. Gaskets/broken hoses.

Mar 16, 2014 | 2006 BMW X5 4.4i

1 Answer

1996 taurus p420 code


The P0420 means Catalyst System Efficiency Below Threshold (Bank 1), and the P0430 means Catalyst System Efficiency Below Threshold (Bank 2).
__________________
ECU unlock immobilizer tool

Sep 17, 2012 | 1996 Ford Taurus

1 Answer

P0430 code


Hi there:

DTC P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
DTC P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Could be some electrical problem, check wires and harnesses connections (cleaning job); also check description and testing HERE.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Sep 14, 2012 | 2005 Kia Sportage

1 Answer

Po430 trouble code


P0430 - Catalyst System Efficiency Below Threshold Bank 2. The most common cause it the three way catalyst converter Bank 2. Common Problems That Trigger the P0430 Code

Feb 19, 2012 | 2005 Dodge Ram 1500

1 Answer

What do these codes mean ? po430 po420 po306 for mercury cougar 1999


P0430 code is(catalyst efficiency below threshold on bank 2)
P0420 code is((catalyst efficiency below threshold on bank 1)
P0306 code is(cylinder 6 misfire detected)

Dec 13, 2011 | 1999 Mercury Cougar

1 Answer

98 gmc sierra 1500 5.7 po430 code


Below is a general description of the problem. Check the following possibilities and we can go from there.


DTC

P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

Description
Indicates Bank 2 catalyst system efficiency is below the acceptable threshold.

Possible Causes
Use of leaded fuel
Damaged Oxygen Sensors
Malfunctioning ECT
High fuel pressure
Damaged exhaust manifold
Damaged catalytic converter
Oil contamination
Cylinder misfiring
Downstream Oxygen sensor wires improperly connected
Damaged exhaust system pipe
Damaged muffler /tailpipe assembly
******** spark timing

Dec 11, 2011 | 1999 GMC Sierra

1 Answer

Hard to start


P0430 Catalyst System Efficiency below Limit - Bank No 2" How would I fix that without taking it in? P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
you need a scan tool to monitor the upstream and downstream 02 sensors on bank 2 more than likely its the converter. also check for exhaust leaks before converter . Most times the problem is the Downstream O2 sensor2_bing.gif is defective.

Jun 02, 2010 | 1996 Ford Taurus

1 Answer

P0430


P0430 Catalyst System Efficiency Below Threshold (Bank 2)

P0441 Evaporative Emission Control System Incorrect Purge Flow
with p0441 did you replace the gas cap on all the way? that will cause this code every time. and or have you ever replaced the gas cap?

Apr 15, 2010 | 2006 GMC Sierra

1 Answer

1997 Mercury Mountaineer What is Catalyst Efficiency Below (Bank


it means the catalyst is worn out, the efficiency is monitored by sensors, when the Cat falls below a certain reading or "threshold" the code is generating telling u that u need a new catalytic converter.

Feb 18, 2010 | 1997 Mercury Mountaineer

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

4,324 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7772 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...