P037F

Glow Plug Sense Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Difficulty starting the engine in cold weather
Floating idle speed
Extended warm-up time
Check Engine Light Illuminates

Causes

Open circuit in glow plug circuit
Glow plug malfunction
Wiring harness damage
Short circuit in the circuit
Faulty glow plug relay
Problems with the engine control module (ECU)

How to Fix

Check the resistance of the glow plugs
Inspect the wiring harness for damage
Check the relays and fuses of the glow plug circuit
Scan the ECU for additional errors
Replace faulty glow plugs
Repair damaged sections of the wiring harness

Related codes

P0380 P0670 P0671