Reset "Service Engine soon" - is it fixed???

johny1

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Everett, WA
#1
1999 BMW 540i
My Service Engine Soon light came on and Peake code reader showed a bad thermostat. However I reset to see if it will show up again and it never came back on, does it mean it was a False Alarm or the issue is still there but it won’t show up via the Service Engine Soon function. My car does not overheat or behave odd.

Here are the 2 coes if anyone cares:

B7 code, which is "LDP diagnosis" -what the F is this? (dealer said it may be my gas tank cap being loose).

8C code, which is Map Controlled Thermostat circuit/control

Both codes are under Table 0F. Any help is appreciated. Thanks
 


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