P0B78

Hybrid/EV Battery Voltage Sense M Circuit Range/Performance

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Incorrect battery voltage readings
Reducing electric range
Possible battery charging problems

Causes

Battery voltage sensor fault M
Open or short circuit in the measurement circuit
Poor contact in circuit connectors
Problems with the hybrid system control module
Corroded or damaged wiring

How to Fix

Check the integrity of the voltage measurement circuit
Inspect connectors and contacts for damage
Test battery voltage sensor M
Check the operation of the hybrid system control module
Replace faulty circuit components

Related codes

P0B77 P0B79 P0B7A