Reoccuring p0133 Fault Code

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Model: Focus
Type: 225 ST
Year: 2009

Reoccuring p0133 Fault Code

Postby Wayne_MagicmanST » Thu Jan 31, 2019 4:00 pm

Hi Guys.. I know this issue has been covered previously I see couple years ago, Id like to get some advice on this one as I have followed the previous topic advice and conducted further diagnosis and still my code is reoccurring.

I drive a 2009 FL ST with a stage 2 dreamscience map on. my fault that is reoccurring is p0133 Bank 1 Sensor 1 slow response. below you will see the items that I have cleaned, tested or replaced on the vehicle with means to end this code but sadly this code is very determined and keeps appearing, clear after clear after clear!

Battery (checked and tested all ok)
Alternator (checked and tested all ok)
Grounds and earth's cleaned and re-tighted
Cleaned 02 sensor
Replace the sensor itself
Clean maf
Test another MAF
Replace fuel rail sensor
Replace map sensor
Exhaust checked for leaks two different exhaust places, They report all fine!
Car logged and retuned
Loaded different map on
Changed induction time after time. Different mounts and bends (90 bend, 45 bend, bottom mount, top mount)
Maf has been placed at 12 O'clock - 6 O'clock no difference
Fuel pump at idle 405kpa

Any further advice on this would be appriciated or if you experienced this personally


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Model: Focus
Type: ST
Year: 2010

Re: Reoccuring p0133 Fault Code

Postby Doonzeboy » Fri Feb 01, 2019 9:27 am

Epic topic, im having the same problem for over a year now.
Even changed software and problem still there.
What could it beeeee

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Re: Reoccuring p0133 Fault Code

Postby Stu » Wed Feb 06, 2019 9:16 am

usually related to when the car is decatted - either run a mini cat or turn the rear O2 sensor off via software
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