Espar Fault Code
Free · no signup020 / 021
Glow Plug Open/Short
System
Not specified
Symptom
Glow Plug Open/Short
Diagnosis & fix steps
LOGIC: The ECU sees no resistance (open) or zero resistance (short) on the glow plug circuit.
Red Seal field insights
Replace the glow plug and the glow plug screen. A clogged screen prevents the fuel from atomizing, causing the plug to overwork and fail.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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