Toyota Highlander
B1491
The presence of a B1491 diagnostic trouble code (DTC) in a Toyota Highlander indicates an issue with the air conditioning (A/C) system, specifically related to the air conditioning amplifier or the circuit related to the A/C control.
2 SolutionsB-CodeBody
B
Error Code Type
Body
Components
1 affected
HVAC
Symptoms
10 common
- •A/C system may not cool properly
- •A/C blower fan may not operate
- •Check engine light illuminated
- +7 more
Most Affected Generations
2 generations
XU70
1
XU50
1
Top Affected Components
1 component
HVAC
2
Severity Levels
1 level
medium
2
Quick Facts
2
Total Solutions
1
Affected Components
10
Common Symptoms
2
Generations
All Solutions
Showing 2 of 2 solutions for error code B1491 across all generations.
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