Advice please - Code P0420

[Zxrob]

I have that code on mine, however, mine is de-cat, the eml comes on only after a fare few miles, just get rid of it with torque pro

Rob

[normanh]

I have already cancelled the code Zxrob and it hasnt reappeared after 80 miles.

Norman

[normanh]

Just had the emissions test done this morning and it looks like the cat is on its way out, surprisingly its didnt fail. Results as follows compared to the ones earlier in the year -

test             21/12/20        10/1/20
fast idle CO       0.28           0.03
Fast Idle HC          34             9
lambda             1.001           1.003

Natural idle CO     0.14            0.02

The MOT is due from the 10th Jan and its unlikely I will be doing many miles now with Tier 4 so if the test is a repeat its going to pass as its stands so maybe the urgency is less than I originally thought. Providing CO is below 30 on fast ideal

Norman   

[shnazzle]

Just had the emissions test done this morning and it looks like the cat is on its way out, surprisingly its didnt fail. Results as follows compared to the ones earlier in the year -

test            21/12/20        10/1/20
fast idle CO      0.28          0.03
Fast Idle HC          34            9
lambda            1.001          1.003

Natural idle CO    0.14            0.02

The MOT is due from the 10th Jan and its unlikely I will be doing many miles now with Tier 4 so if the test is a repeat its going to pass as its stands so maybe the urgency is less than I originally thought. Providing CO is below 30 on fast ideal

Norman   

What did you do to obtain the values in the new test?

[normanh]

See above m8 those dated 21/12/20 last MOT is dated 10/1/20. Now have the phone reader will try that sometime when its not raining.

Norman

[MRSwede]

In Sweden when our old Volvos having problem passing MOT cause of high CO, we are overdosing fuel system water remover with good outcome.

Just a thought 

[normanh]

Good News Today - MOT Passed no advisories

Emissions today as follows -

   Fast Idle
CO 0.26%/Vol
HC 27ppm
Lambda 0.994

Natural Idle
CO 0.31%/Vol

The manic rush id=s now off, will wait for the weather to warm up an then change the cat/sensor.

Norman

[jonbill]

In Sweden when our old Volvos having problem passing MOT cause of high CO, we are overdosing fuel system water remover with good outcome.

Just a thought 

thats good to know. something like isopropanol?

[shnazzle]

In Sweden when our old Volvos having problem passing MOT cause of high CO, we are overdosing fuel system water remover with good outcome.

Just a thought 

thats good to know. something like isopropanol?

Temporarily bypassing the PCV helps as well

[normanh]

We have some 10% ethanol already in our fuel adding IPA might be a tad risky - not talking about the beer guys

Norman

[Ardent]

Where are you based if you have 10% ethanol?

[MRSwede]

According to the safety pamphlet containing

Ethanol
Propan-2-ol
4-Metylpentan-2-on
Butanone
   

[normanh]

Unleaded has/will have 10% bio-ethanol https://www.autoexpress.co.uk/news/104126/e10-petrol-be-uk-standard-wont-work-1m-older-cars

Was 5% and increased to reduce emissions, compatibility is questionable with older cars. TBH I filled up the other day and never looked at the pump to see whether it was E5 or E10 fuel

Norman

[Joesson]

Unleaded has/will have 10% bio-ethanol https://www.autoexpress.co.uk/news/104126/e10-petrol-be-uk-standard-wont-work-1m-older-cars

Was 5% and increased to reduce emissions, compatibility is questionable with older cars. TBH I filled up the other day and never looked at the pump to see whether it was E5 or E10 fuel

Norman

From the link that Norman provided we can see:

Toyota Motors Group
Toyota:
E10 petrol is cleared for use in all Toyota European petrol models made from January 1998, excluding:
• Avensis 2.0 litre with engine 1AZ-FSE made between July 2000 and October 2008.
• Avensis 2.4 litre with engine 2AZ-FSE made between June 2003 and October 2008.


It would seem on this basis that E10 fuel is compatible with our 2's.

[Ardent]

I will wager a coffee it was E5. Not seen an E10 pump yet. but will be dodging them, should I encounter.

[jonbill]

I don't think ethanol is that good at mixing fuel and water. Too short to do the job.

[normanh]

I think MRswede is referring to the use of de-icer which is IPA based.

Norman

[MRSwede]

No not de-icer (spraying on surfaces).

Hard to link to something that seems to be sold mainly in Scandinavian

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