SEN00459-01 40 Troubleshooting
34 114E-3 Series
E-20 Code [281/CA281] High pressure pump error 1
Error code Failure code
Trouble High pressure pump error
281 CA281
Contents of
trouble
• Response of fuel force feed is poor due to high pressure pump mechanical system error.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Engine does not start. Engine runs, but in unstable condition.
• Pressure of high-pressure fuel at front side is different from that at rear side.
Related infor-
mation
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1 Air in fuel circuit
Bleed air from the fuel circuit. See Testing and adjusting, “Bleeding
air from fuel circuit.”
2
Defective wiring harness
connector
Connecting parts among common rail pressure sensor, engine wir-
ing harness, and engine controller are suspected. Inspect them
directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
3 Defective engine controller
If causes 1 and 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
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