5.0 OPERATION 53
CXO300 OWNER’S MANUAL
Alarm Message Explanation
Limp-home override active
The control system has recorded a limp-home override request an accepted it.
Full performance is available at risk of further damage.
Intake throttle error
The control system has detected an issue with the intake throttle and has entered limp-home
mode.
RPM limit reached
The crank speed sensor has reported that the RPM limit has been reached. On repeat
instances, the ECU may limit performance.
Oil pressure low
An oil pressure temperature sensor is reporting a value below the acceptable range. The ECU
is likely to limit performance or enter limp-home mode.
Oil temperature high
The oil temperature sensor is reporting a value above the acceptable range. Depending on
severity, the ECU may limit performance or enter limp-home mode.
Powerhead temperature
high
One or both of the powerhead temperature sensors are reporting a value above the
acceptable range. Depending on severity, the ECU may limit performance or enter limp-home
mode.
Coolant temperature high
The coolant temperature sensor is reporting a value above the acceptable range. Depending
on severity, the ECU may limit performance or enter limp-home mode.
Battery voltage low The control system has detected a low battery voltage.
Manifold overpressure
The manifold pressure sensor is reporting a value over target. The ECU is likely to limit
performance or enter limp-home mode.
Abnormal fuel pressure
The fuel pressure sensor has reported a value outside the acceptable range. The ECU is
likely to limit performance or enter limp-home mode.
Water in fuel
The water-in-fuel sensor has reported a high water level in the water separator. The ECU is
likely to limit performance, enter limp-home mode or deny engine start.
Check engine
The control system has detected an error which does not fit into the categories above and
further diagnosis is required. The ECU may limit performance, enter limp-home mode or shut
the outboard down. Contact an authorized Cox Powertrain dealer for further support.
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