P037A

Glow Plug/Heater Indicator Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Difficulty starting the engine, especially in cold weather
Check Engine Light Is On
Reduced engine efficiency

Causes

Open or short circuit in wiring harness
Glow plug indicator fault
Problems with the engine control unit (ECU)
Faulty glow plug relay

How to Fix

Check the wiring harness for damage
Check glow plug indicator
Check glow plug relay
Check engine control unit (ECU)

Related codes

P0670 P0671 P0672 P0673 P0674