U3505

Control Module Input Power B Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Unstable operation of electronic systems
Intermittent engine malfunctions
Check Engine Light Illuminates
Problems starting the engine
Disabling certain vehicle functions

Causes

Poor contact in the control unit connectors
Broken or damaged wires in the power circuit
Faulty power relay
Fuse problems
Malfunction of the control unit itself

How to Fix

Check the condition of the power circuit fuses
Inspect the connectors and contacts of the control unit
Check the integrity of the wiring in the power circuit
Test the power relay
Check the voltage at the input of the control unit

Related codes

U3504 U3506 U3500