Three thoughts:
Check the sensor is connected back to pin D7 on the ECU (via RHFHC8 and MHC3).
Check that there is an earth to the sensor.
Check that there is 12V connected to the O2 sensor heater.
See the Wiki.
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How do I diagnose the O2 sensor?
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Re: How do I diagnose the O2 sensor?
by GeoffSmith » Sun 10.04.2011, 19:57
Calypso Red S2 #417
USB ElanScan interfaces - £60 incl. UK P&P & £65 incl. ROW P&P
USB ElanScan interfaces - £60 incl. UK P&P & £65 incl. ROW P&P
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GeoffSmith - Kitty Fiddler
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Re: How do I diagnose the O2 sensor?
by DeeAitch » Fri 15.04.2011, 21:24
DeeAitch wrote:MOT is due soon so I guess I'll find out then if it's working OK
MOT today :
CO 0.53 against a max of 3.5
Pre O2 sensor last year was 4.3
So I think it is working - ESM, you are a genius
Brakes? That's another story
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DeeAitch - God
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