P1000 - P0128 - P1122

Question

Getting these 3 codes on 2002 Jaguar XJR all of a sudden.

Which is the first to attack? I thought the thermostat was taken out when I bought the car because the heater would not get very hot, just comfortable. But now in the warm climate of Florida, it suddenly went into limp mode. Even after restarting, it will go into limp mode. I don't think it is the thermostat, and hoping it is corrosion in the contacts of the sensors. Any help will be very appreciated. Thanks

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Answer 1

Yes, it could be the thermostat that causing the poor heating and the P0128 code. It is possible that he engine is not getting as hot as it should without the thermostat.