P2B76

Coolant Heater B Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Extended engine warm-up time
Reduced interior heating efficiency
Check Engine Light Illuminates
Possible reduction in fuel economy

Causes

Open circuit in the heater circuit
Coolant heater malfunction
Relay or fuse problems
Control unit malfunction
Contact corrosion

How to Fix

Check the integrity of the heater circuit
Check fuse and heater relay
Check heater resistance
Inspect contacts for corrosion
Check the operation of the control unit

Related codes

P2B75 P2B77 P2B78