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Member Since 26 May 2009
Offline Last Active May 30 2009 06:38 PM

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Recuring engine warning light

30 May 2009 - 06:42 PM

Hi all

Some time ago my Focus 1.6 LX developed a fault.

The amber engine warning light illuminated and my fault reader gave a P04020 error code. My local garage has replaced the cat, the forwardand rear lambda sensors, temperature sensor and the fuel regulator. These were replaced (on fords recomendation) separately but on each occasion the warning light again came on again after about 50 miles. The light is again on now, the error code is the same as on previous occasions but we are running out of options and parts to replace.

The following info came from my memoscan

Fault Code - P04020 Generic Catalyst efficiency Below Threshold (Bank 1)

Freeze Frame info

trouble code - P0420

Fuel SYS1 CL, faulty HO2S
Fuel SYS2 CL, faulty HO2S
calc laod 56%
coolant 112 deg C
ST FTRM 1 -3.1
LT FTRM 1 -6.2

MAP (Kpa) 0
engine RPM 2703
Speed 78Km/h

Any help with a diagnosis would be greatly appriciated