Author Topic: Coolant temp. sensor fault?  (Read 5019 times)


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Coolant temp. sensor fault?
« on: March 13, 2023, 04:24:20 PM »
Noticed this when doing a scan last night. No error on the dash or any problems that Ive noticed. Has anyone seen this?
Bike - 2019 BMW R1250 RT

Fault code value - 0x3A1392
Fault code description - Coolant temperature sensor, implausible signal or value
Currently present - NO
Malfunction indicator light - NO
Frequency count - 2
Logistic (healing) count - 37

Tried to post a pic but couldn't. Any help appreciated.
« Last Edit: March 13, 2023, 06:15:53 PM by brorke »

GS Jim

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Re: Coolant temp. sensor fault?
« Reply #1 on: April 20, 2023, 05:07:37 PM »
This is probably not as good as Beckys advice but here is the code's info

Fault Code Description
The digital engine electronics detects an implausible value from coolant temperature sensor.
The coolant temperature is changing at an impossibly fast speed.
Check wiring, wiring harness and plug connector to the coolant temperature sensor.
Check wiring harness plug connector to DME
Check coolant temperature sensor.
Fault Impact
Possible rough engine running, lack of power and difficulty starting.
The engine fan is running on a permanent basis.

Does the dash temperature read out remain plausible?
If you don't have any symptoms like rough running, fan on, I would just clear it and see if it comes back