Toyota Avalon 2001 error code 1155 - 2002 Toyota Avalon

The cooling temperture send unit is send out of range data to the computer (ECU).

The corrective is to buy a coolant sending unit and replace it.

The unit is withing 6 inches from the thermostat housing.


Since your car is a 2002 and probably has around 80,000 miles on the odometer so it's a good time to all of the following on the same time.


temp. sending unit / clean the contacts

drop bottom coolant has and flush radaiator

change 195 F thermostat and gasket + seal with black RTV.

Fill 50/50 mix coolant. /// if you live in aub-zero temp area then read the chart on the bottle for the recommended mix


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Cheers,

MUSTGO