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Hello and Welcome! I'm Billy and i will assist you with your inquiry. Feel free to ask if any further info is needed.
have you replaced or reset the BSI?
have you checked if the engine management software needs updating ?
did this problem occur after disconnecting the battery, or other related issues?
car came in with fan running already had sensor changed by other garage i changed bsi and fan still running reset and cleared all codes code p11aa still comes up
The most likely cause for this would be the engine management software.
It needs updating.
However, check first if the sensor is working as it should (by monitoring the live data using a diagnostics computer). If that is operating normally, then you need to have the engine management software updated.
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yes live data is reading same as temp gauge
Then, the next step would getting the software update/upgrade.
Get back to me with your findings, or if further info is neede.d
hi yes sent for software update