M ..........
MAP_Angle_RangeHigh
Fault Type: Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky None 100% 402‑24 No 1
Explanation
The manifold absolute pressure (MAP) sensor does not appear to be working properly; the PCM received a signal that is above
the valid limit.
Possible Causes
• Sensor out of range
• Wiring problem
• Restricted sensor reference hose
• Valve train issue
Summary of Fault Correction Possibilities
• Replace the sensor.
• Correct the wiring problem.
• Check the reference hose for leaks.
• Check the cylinder leak down.
MAP_Angle_RangeLow
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky None 100% 402‑25 No 1
Explanation
The manifold absolute pressure (MAP) sensor does not appear to be working properly; the PCM received a signal that is below
the valid limit.
Possible Causes
• Sensor out of range
• Wiring problem
• Restricted sensor reference hose
• Valve train issue
Summary of Fault Correction Possibilities
• Replace the sensor.
• Correct the wiring problem.
• Check the reference hose for leaks.
• Check the cylinder leak down.
MAP_Time_RangeHigh
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 401‑24 Yes 2
Explanation
The manifold absolute pressure (MAP) sensor does not appear to be working properly; the PCM received a signal that is above
the valid limit.
Possible Causes
• Sensor out of range
• Wiring problem
Fault Codes
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 4A-25
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