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P0427 Catalyst Temperature Sensor Low Input (Bank 1)


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After going back onto the motorway after a fuel stop this evening the car lost all guts and a check engine light came on. It won't rev over 2-2500rpm. Completely gutless.

I have an error: P0427    Catalyst Temperature Sens or Low Input (Bank 1)

I can clear it with the nanocom but 2 secs later it's back again.

It's a 2016 2.2 (Juuust out of warranty). Any ideas???

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It appears the lambda sensor is gone. The nanocom register a voltage of around 0.01 at times. It should sit at a bit over 4 on tickover.

I can't get hold of a new sensor today so I will try to clean it, hopefully it will prolong the life until I can get a new sensor. Maybe it will do nothing.

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