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norcalx
• Redding, CA, USA
• Registered on 7/20/2007
• 1 post
Posted:7/20/2007 17:55
I was towing a toyhauler to the coast and back and when I accelerated hard up a hill the engine light came on. I made it over to the coast and after sitting for a while the light went out. On the way home towing up a steep grade again the light came on and did not go out. I put on the Superchips programmer and it gave me the following DTC# 1211 which says ICP not controllable - Pressur above/ below desired. Should I be concerned about this because I plan on taking another trip this Sunday and hauling the toyhaluer again. Thanks for all the info.
DTC P1211 indicates that injection control pressure was above or below commanded desired pressure during self test mode.
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
ICP pressure above/below desired
IPR valve failed, stuck, or shorted to ground
Verify correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.
ICP Injection control pressure sensor
Feedback input. The PCM monitors the high pressure oil system to determine if it needs to be increased if load demand increases. It also uses this to stabilize idle speed. Volts in: 1.0 volt @ 580 psi, 3.22 volts @ 2520 psi.
IPR injection pressure regulator
Output. The PCM controls the high pressure oil system by varying the duty cycle of the IPR. The IPR controls the oil bypass circuit of the high pressure pump. 0% = full return to sump (open valve), 100% = full flow to injectors (closed valve). The PCM monitors the system with the ICP input. The PCM can control fuel delivery to the injectors by increasing the IPR duty cycle which increases fuel pressure through the injector nozzles.
Bill
2002 Excursion XLT-P 4x4 7.3L Powerstroke Diesel
Posted:7/20/2007 17:55