U0166 — Lost Communication With Auxiliary Heater Control Module

Q: What does fault code U0166 mean?

U0166 means: Lost Communication With Auxiliary Heater Control Module. It is a Network (CAN bus, communication) fault code defined by the OBD-II standard.

Q: Can I keep driving with U0166?

With U0166 you can usually drive home and book an inspection within a few days unless the car feels abnormal.

Network (CAN bus, communication)

Lost Communication With Auxiliary Heater Control Module

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Can I drive with U0166?

You can usually drive home and book an inspection within a few days.

Frequently asked questions

What does fault code U0166 mean?

U0166 means Lost Communication With Auxiliary Heater Control Module.

Can I keep driving with U0166?

You can usually drive home and book an inspection within a few days.

Related fault codes

U0160 — Lost Communication With Horn Control Module
U0161 — Lost Communication With Compass Module
U0162 — Lost Communication With Navigation Display Module
U0163 — Lost Communication With Navigation System Module
U0164 — Lost Communication With HVAC Control Module
U0165 — Lost Communication With HVAC Control Module
U0167 — Lost Communication With Immobilizer Control Module
U0168 — Lost Communication With Vehicle Security Control Module
U0169 — Lost Communication With Sunroof Control Module

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