The connector in the engine bay should be a 3 pin on the bulkhead in front of the central filter housing - I tried attaching them but they're in xps format as don't have pdf writer on my laptop.....it looks like Elsawin shows LHD so not sure if it swaps sides, but diagram shows it more to the passenger side.
There's a test procedure for confirming if it's knackered as well, which involves measuring resistance across pins 2 and 3 of between 450-1000 ohms (based on 20C ambient and goes up with air temp). Pin one is the squared end of the 3 pin connector.
If that looks OK it then suggests checking for continuity across pins 2 and 1 (earth) and pins 3 and 1. Should be no continuity and if there is then it's new sensor time.
Other than that it suggests a physical check of the wiring to the ECU....
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