P26B7

Engine Coolant Bypass Valve C Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–67 (est.)

Symptoms

Check Engine Light Is On
Unstable engine temperature
Engine overheating
The engine takes a long time to warm up
Reduced cooling system efficiency

Causes

Open or short circuit in valve control circuit
Coolant bypass valve malfunction
Damaged wiring harness or connectors
Relay or fuse problems
Engine control unit (ECU) malfunction

How to Fix

Check valve control circuit integrity
Inspect connectors and wiring for damage
Check valve resistance (compare with factory values)
Replace faulty coolant bypass valve if necessary
Check and replace relays or fuses if necessary

Related codes

P26B6 P26B8 P26B9