Summary of Fault Correction Possibilities
• Correct the wiring problem.
• Replace the fuel pump relay.
G ..........
Guardian_Active
Fault Type: Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky None 100% 2011‑23 Yes 4
Explanation
This fault indicates that engine power is being limited by another fault. Check Guardian Due to: on Live Data for the cause.
This fault will disappear when other faults are resolved.
Possible Causes
• Active fault
Summary of Fault Correction Possibilities
•
Refer to Section 3A ‑ Troubleshooting MFD Faults, or review the specific fault that is listed in CDS G3.
Guardian_EGTTemp
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution Variable 2032‑23 Yes 4
Explanation
Engine Guardian is active due to exhaust overtemperature. Power will be limited to prevent engine damage.
Possible Causes
• Restricted water pickup
• Low cooling water flow
• Restricted or plugged exhaust water sprayer
• Sensor wiring problem
• Defective sensor
Summary of Fault Correction Possibilities
• Clear/unclog the water pickup.
• Correct the cooling water flow problem.
• Clean the exhaust water sprayer.
• Correct the wiring problem.
• Replace the sensor.
Guardian_OilPressure
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution Variable 2051‑23 Yes 4
Explanation
Engine Guardian is active due to low oil pressure. Power will be limited to prevent engine damage.
Possible Causes
• Low engine oil
• Sensor wiring problem
• Defective sensor
Fault Codes
Page 4A-20 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018
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