MasterTuning Fault code dictionary (DTC)

B1851 — Climate Control Temperature Differential Circuit Short To Battery

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningClimate Control Temperature Differential Circuit Short To Battery.
FamilyBody (B)

Frequently asked questions

What does code B1851 mean?

Climate Control Temperature Differential Circuit Short To Battery. Climate Control Temperature Differential Circuit Short To Battery.

Can I keep driving with code B1851 active?

With caution: limp mode possible, have it checked soon

How do you fix code B1851?

Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.

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Where to get it fixed

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