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Ford Fiesta ECO Boost 1.0 2013 - Code P0420-09 #

Posted by Ian tudor on December 10, 2018, 7:22 pm

Year of Manufacture: 2013
Engine Size and Code: 1 litre ecoboost
( Optional ) Scanner Used: Snap on modi’s ultra
( Optional) Fault Codes: P0420-09

Hi there had a car in today for mot but customer said engine light comes on now and again and was on when he arrived . Scanned It for him and fault code p0420-09 was present (catylist below threshold . Proceeded to do mot and all was fine emission readings were CO 0.09%. HC57PPM and lambda 1.00 . At idle CO was 0.02 %=Rescanned it and looked at data @2000 rpm pre cat sensor was 1.5 v and post cat sensor was 0.5 v on graph they were basically mimicking each other had to pass it coz all was ok but he said he will want it looked at .i haven’t come across the -09 bit after this code before can anyone offer any help
Thanks in advance
Ian

Re: Ford Fiesta eco boost

Posted by aidan birley <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on December 11, 2018, 8:14 am, in reply to "Ford Fiesta eco boost "
Aidan Birley

From Auto data, general guide to fault codes

Failure type codes

All EOBD codes may have an additional two characters following the main trouble code which indicate the type of failure, e.g. P0351-XX, where 'XX' equals the failure type code.

Failure type codes are more commonly displayed using manufacturers' diagnostic equipment and can be used in conjunction with all EOBD code types, 'B', 'C', 'P' & 'U'.
Examples of failure type codes
EOBD code Failure type
00 No failure type information
01 General electrical failure
07 Mechanical failure
08 Data bus signal/message failure
0A General electrical failure 2
2A Signal stuck in range
3A Signal has too many pulses
49 Internal electronic failure
4A Incorrect component installed
A3 System voltage high
Example: Trouble code P0351A3

This code is logged when the system voltage detected is high in the primary or secondary circuit of ignition coil A.
P System - Powertrain
0 Code type - SAE defined (EOBD)
3 System identification - Ignition system or misfire
51 General malfunction - Ignition coil A, primary/secondary - circuit malfunction
A3 System voltage high
Hexadecimal codes

The EOBD trouble code is a hexadecimal number and therefore the third, fourth, fifth, sixth and seventh characters can be either a number (0-9), or a letter (A-F).

Unlike the decimal system that uses a base of 10, the hexadecimal system uses a base of 16. Using the characters 0-9 and A to F the number can be from 0-15.
Character 0 1 2 3 4 5 6 7 8 9 A B C D E F
Value 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

By using the hexadecimal system two characters can equate to a maximum number of 255. In the decimal system the maximum number with two characters is 99.

For example:
Hex Decimal equation Decimal
C8 (12 x 16) + (8 x 1) 200
FF (15 x 16) + (15 x 1) 255
100 (1 x 16 x 16) + (0 x 16) + (0 x 1)

Re: Ford Fiesta ECO Boost 1.0 2013 - Code P0420-09 #

Posted by Colin Hedger <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat1335' width='330' height='300' border=0 style='border:none;'> on February 1, 2019, 8:40 am, in reply to "Ford Fiesta ECO Boost 1.0 2013 - Code P0420-09 #"
Colin Hedger

Hi Ian
Wierdly enough this could have been my post!
I have a 2012 focus ecoboost 1.0 with exact same symptoms - code says catalyst below threshold - I cant remember the code numbers as I'm at home and the code is at work but will post later.
I was surprised to see the 1.5v pre cat oxy sensor reading at first. Is this because its not a std zirconium sensor?
Can someone tell me if these reading are correct/ expected?
Thank you.

Colin.

Re: Ford Fiesta ECO Boost 1.0 2013 - Code P0420-09 #

Posted by Colin Hedger <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat1335' width='330' height='300' border=0 style='border:none;'> on February 8, 2019, 1:55 pm, in reply to "Re: Ford Fiesta ECO Boost 1.0 2013 - Code P0420-09 #"
Colin Hedger

Probably does'nt help Ian but mine had cracked head and coolant entering the Cat.
Colin.

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