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I got a p0420 code from a honda dealer check. how serious is this problem and how quick should i fix . any idea on costs and should a dealer repair this

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

localwonder
  • 6784 Answers

SOURCE: Engine light came on. The dealership said it was diagnostic code P0420 and that it would cost @ $1,200.00 to repair. This seem pretty high. What is this diagnostic code about and is the repair rate

Hi, this code represents a Catalyst System Efficiency Below Threshold (Bank 1). and the repair, considering that it will be repaired by the dealership, seems to be in the normal cost range. The labor is what usually inflates the price when dealing with catalytic replacements.

You could probably get a better deal by taking it to a non dealership type of repair shop. This may cut at least 200 dollars of the original dealership quote.

Please rate and god bless:)

Posted on Apr 14, 2009

  • 736 Answers

SOURCE: Check engine light comes on if gas cap is loose

replace the gas cap .. clean the gas filler pipe where it seals against the gas cap .. .. even a small crack in the rubber seal will trigger the check engine light ..

Posted on Jul 02, 2009

  • 1 Answer

SOURCE: Check Engine Light came on with code p0420. Dealer wants $3900 to fix "b2 manifold and front pipes. Does this make sense. Are their better alternatives. I left the dealership without fixing it and the

if u r have lexus or v 6 or v8 so change or check u r leak of exhouse bank #1 driver side if u all want any question send me mail malikume@eim.ae

Posted on Jul 25, 2009

chitownbob45
  • 316 Answers

SOURCE: Took my Honda to Midas because the Check Engine

They will charge you as much as they think they can get away with by looking you up and down.

Posted on Oct 13, 2009

  • 509 Answers

SOURCE: Results from scanning my Check engine' are P0328 and P0420

This website will give you the meaning of the codes.

http://www.troublecodes.net/Subaru/

Posted on Jan 01, 2010

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Every time I go over a speed hump even slow or a bump in the road there is a thump or bang from the front right wheel


the dealer is having you on
thumps , bumps and the like indicate something worn , loose or ready to go bad quick
it could be lower ball joints, upper control ball joints or upper mount if strut suspension
could be worn rubbers in the stabilizer bar area
Best take it to an accredited suspension specialist shop and have it checked out ( get a quote to fix) before it fails and causes serious damage
if it is serious and costly get a report and then front the dealer for the cost of repairs or talk with a lawyer

Jun 04, 2016 | Cars & Trucks

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HOW TO CHECK CADILICONVERTER TO SEE IF BAD


disconnect exhaust at manifold flanges and see if engine runs better... yes it will be very loud

May 16, 2014 | 1991 Ford F150

1 Answer

2001 Toyota Sienna CEL displayed code P1150 & P0420 what could be the problem


Mine is a 2001 Sienna LE. I got the P0420 code and the dealer want to replace an engine control computer for $1600. I've found posts that say you can replace your oxygen sensors, which still costs around $100 each. The P0420 seems to be emissions related. When my check engine light comes on, I run the highest grade, no ethanol gas, and usually within a couple of tanks, the light goes off again. The last time it happened about 2 wks ago, I put in the 93 octane no ethanol premium and a can of Seafoam and within a half a tank, the light went out. Your problem might be more serious, and I don't know what the 1150 code is, but so far that's worked for me.

May 17, 2012 | 2001 Toyota Sienna

2 Answers

Engine code p0420


The P0420 code is set when the oxygen sensor after the catalytic converter gives a reading the same or very close to the reading of the oxygen sensor(s) before the catalytic converter.

There are usually three possible causes...
The front oxygen sensor (before the cat) is giving an incorrect reading.
The rear oxygen sensor (after the cat) is giving an incorrect reading.
The catalytic converter is not working properly.

Since you recently replaced the cat, the logic points to the sensors, but it could be the cat again. Aftermarket converters are usually smaller than OEM and don't last as long.

For a more thorough description of the code and troubleshooting visit
http://www.obd-codes.com/p0420

Our Subaru encountered this issue several years ago under warranty. The first time the dealer replaced the front oxygen sensor. This was the cheapest repair and since it was an intermittent problem I am sure they hoped to delay the issue until the warranty was up. The second time they replaced the catalytic converter and we haven't had any more issues.

Jan 08, 2010 | 2000 Honda Civic

3 Answers

I have a a check engine light on. Honda tech diagnosed it as a plugged catalytic converter. Estimated parts costs alone are $1300 including converter, exhaust manifold, 2 O2 sensors. Car runs fine at...


If it accelerates good, going up a hill, and you don't feel it holding back, or sluggish when trying to accelerate, I'd certainly get a second opinion. What code were/are you getting?

Dec 31, 2009 | 1998 Honda Civic

2 Answers

Check engine light came on, dealer says its the throttle chamber. I have a 2003 Nissan Altima


Disconnecting the battery might reset the check engine light on some cars. However, instead of doing so, I'd recommend to bring your car to a dealer or a mechanic for proper diagnostic, and here is why:
- not all cars will clear the code after disconnecting the battery
- often, the problem may be actually covered by the warranty and repaired free of charge by your dealer. For example, if you have the code P0420 - Catalyst System Efficiency Below Threshold it's very possible that your catalytic converter is still covered by the original emission warranty and might be replaced free of charge (would cost you close to $1000 otherwise).
- some problems, if not repaired in time may cause a serious damage and more costly repair.
- disconnecting the battery will cause basic settings of the vehicle's computer to be erased (e.g. idle settings, fuel trim settings, transmission shift points, etc.)
- the Readiness code will be erased, which may prevent your car from completing an emissions test. (Readiness code is an indication that certain emission control components of your car have been self-tested)
- the radio, if code-protected, may be locked after disconnecting the battery
- the "check engine" light will come back anyway if the problem still persists.
This can also be related to a coolant flush. Also check that all the car's fluid levels are correct. Thank you, Have a nice day...!

Sep 19, 2009 | 2003 Nissan Altima

2 Answers

Service engine light on constantly. what to look for to fix


Ken,
You will want to take your car to your local Auto Zone or Advance auto and ask them to scan the car for trouble codes. They will do it for you at no charge and you will see what is causing the the service engine light to come on. You can write the codes down and respond back so we can start diagnosing.
Let me know what the codes are, good luck.
Regards,

Sep 19, 2009 | 1990 Buick LeSabre

1 Answer

Service engine light on --intermitant---surges at slow speeds


Disconnecting the battery might reset the check engine light on some cars. However, instead of doing so, I'd recommend to bring your car to a dealer or a mechanic for proper diagnostic, and here is why:
- not all cars will clear the code after disconnecting the battery
- often, the problem may be actually covered by the warranty and repaired free of charge by your dealer. For example, if you have the code P0420 - Catalyst System Efficiency Below Threshold it's very possible that your catalytic converter is still covered by the original emission warranty and might be replaced free of charge (would cost you close to $1000 otherwise).
- some problems, if not repaired in time may cause a serious damage and more costly repair.
- disconnecting the battery will cause basic settings of the vehicle's computer to be erased (e.g. idle settings, fuel trim settings, transmission shift points, etc.)
- the Readiness code will be erased, which may prevent your car from completing an emissions test. (Readiness code is an indication that certain emission control components of your car have been self-tested)
- the radio, if code-protected, may be locked after disconnecting the battery
- the "check engine" light will come back anyway if the problem still persists. Thank you.

Sep 17, 2009 | 1998 Oldsmobile 88

2 Answers

Engine light came on. The dealership said it was diagnostic code P0420 and that it would cost @ $1,200.00 to repair. This seem pretty high. What is this diagnostic code about and is the repair rate


Hi, this code represents a Catalyst System Efficiency Below Threshold (Bank 1). and the repair, considering that it will be repaired by the dealership, seems to be in the normal cost range. The labor is what usually inflates the price when dealing with catalytic replacements.

You could probably get a better deal by taking it to a non dealership type of repair shop. This may cut at least 200 dollars of the original dealership quote.

Please rate and god bless:)

Apr 14, 2009 | 2005 Subaru Outback

3 Answers

03 Honda Odyessy, and the emission light is on.


The first Question is---Do you have Smog Checks where you live????

Jan 19, 2009 | 2003 Honda Odyssey

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