#1: What's this mean Author: Zack, Location: NorthamptonshirePosted: Thu Jun 20, 2013 7:08 am ----
Cheers
Engine light came on bout co2
#2: Re: What's this mean Author: macca1411, Location: Westhoughton, LancashirePosted: Thu Jun 20, 2013 7:32 am ---- Could be a lambda sensor not working, catalyst not operating correctly. Could be related to a fuel/air problem.
www.p0420.com/ Last edited by macca1411 on Thu Jun 20, 2013 7:36 am; edited 2 times in total
#3: Re: What's this mean Author: MrZiggerz, Location: Milton KeynesPosted: Thu Jun 20, 2013 7:33 am ---- A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination
^ Literally the first thing on google. Use your common sense.
#4: Re: What's this mean Author: Edward, Location: In the garagePosted: Thu Jun 20, 2013 8:41 am ---- That error will have been flagged up by the downstream lambda as it's the one that checks the output from the cat.
#5: Re: What's this mean Author: Zack, Location: NorthamptonshirePosted: Thu Jun 20, 2013 9:24 am ----
Edward wrote:
That error will have been flagged up by the downstream lambda as it's the one that checks the output from the cat.
So it is the 2nd sensor after that cat?
Cheers
#6: Re: What's this mean Author: Zack, Location: NorthamptonshirePosted: Thu Jun 20, 2013 9:25 am ----
MrZiggerz wrote:
A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination
^ Literally the first thing on google. Use your common sense.
You not think i did do that. so ill just go change all of the above lol.
#7: Re: What's this mean Author: LloydPug206, Posted: Thu Jun 20, 2013 10:10 am ----
Zack wrote:
MrZiggerz wrote:
A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination
^ Literally the first thing on google. Use your common sense.
You not think i did do that. so ill just go change all of the above lol.
Im sorry Zack but Ziggerz does have a point... That is the good old fashioned fault finding where you have to systematically go through the components which could be at fault to understand the root cause of the problem.
It simply isn't always as easy as plugging in a 'nostics unit and straight away knowing the exact part at fault.
#8: Re: What's this mean Author: E5GDM, Location: EssexPosted: Thu Jun 20, 2013 12:02 pm ---- You might need a new cat.
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