Fault code
Fault message
Meaning
Action
023
L1 COOLANT LEVEL Coolant level too low
(1st limit value)
Check coolant level in expansion
tank (→ Engine operating instruc‐
tions).
024
L2 COOLANT LEVEL Coolant level too low
(2nd limit value)
Check coolant level in expansion
tank (→ Engine operating instruc‐
tions).
025
L1 P-OILFILTER
DIFF
Oil filter differential pres‐
sure too high (1st limit val‐
ue)
Check oil filter (→ Engine operating
instructions).
027
L1 LEVEL LEAKAGE
FUEL
Leak fuel (1st limit value).
Check fuel system (→ Engine oper‐
ating instructions).
030
ENGINE OVER‐
SPEED
Engine overspeed; auto‐
matic emergency engine
stop.
1. Acknowledge alarm.
2. Attempt to restart engine.
031
CHARGER 1 OVER‐
SPEED1
ETC 1 – speed violation
(1st limit value).
• Engine management system au‐
tomatically reduces power.
• Check air filter (→ Engine op‐
erating instructions).
032
CHARGER 1 OVER‐
SPEED2
ETC 1 – speed violation.
(2nd limit value)
• Engine management system au‐
tomatically reduces power.
• Check air filter (→ Engine operat‐
ing instructions).
044
L1 LEVEL INTER‐
COOLER
Charge air coolant level too
high/low (1st limit value
violated).
Check coolant level (→ Engine op‐
erating instructions).
045
L2 LEVEL INTER‐
COOLER
Charge air coolant level too
high/low (2nd limit value
violated).
Check coolant level (→ Engine op‐
erating instructions).
051
L1 T-LUBE OIL
Oil temperature too high
(1st limit value)
Reduce power.
052
L2 T-LUBE OIL
Lube oil temperature too
high (2nd limit value)
1. Reduce power.
2. Check oil level (→ Engine oper‐
ating instructions).
057
L1 P-COOLANT
Coolant pressure too low
(1st limit value)
.
Check coolant circuit
058
L2 P-COOLANT
Coolant pressure too low
(2nd limit value)
• Automatic engine shutdown.
• Check coolant level (→ Engine
operating instructions).
065
L1 P-FUEL
Fuel inlet pressure too low
(1st limit value)
(→ Engine operating instructions)
• Check fuel lines for leakage.
• Clean fuel prefilter.
• Rinse fuel prefilter.
• Replace fuel prefilter element .
• Replace fuel filter.
066
L2 P-FUEL
Fuel inlet pressure too low
(2nd limit value)
(→ Engine operating instructions)
• Check fuel lines for leakage.
• Clean fuel prefilter.
• Rinse fuel prefilter.
• Replace fuel prefilter element .
• Replace fuel filter.
66 | Troubleshooting | MS150025/02E 2012-10
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