Thread: Diagnostic Scan Reading P1209 code!
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Old 05-22-2012, 08:39 AM
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Originally Posted by mueckster
KE15 CONTINUOUS DIAGNOSTIC TROUBLE CODE (DTC) P1211, P1209
DTC P1209 and P1211 indicates that injection control pressure was above or below desired level under normal driving conditions.
Possible causes:
incorrect oil or viscosity
poor oil quality
gel fuel/no fuel
low fuel pressure
damaged IPR valve
high-pressure oil system leak
damaged high-pressure oil pump
damaged PCM
Verify correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.
The oil is good I run Rotella 15-40 and change it every 3 thousand miles. My Fuel pressure is good too, it reads nearly 85psi at idle and about 60 -65 when I punch it. I have no oil leak on the high pressure oil pump. So does that leave to replace the IPR?
 
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