B1405

Control Module Voltage Reference Output 2 Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Incorrect engine operation
Check Engine Light Illuminates
Floating idle
Power Loss

Causes

Open or short circuit in wiring harness
Contact corrosion
Control module malfunction
Poor grounding

How to Fix

Conduct a visual inspection of the wiring harness for damage.
Check the continuity of the reference voltage circuit using a multimeter
Check contacts for oxidation and corrosion
If necessary, replace the control module

Related codes

B1404 B1406 P0650