PACCAR MX (2004 Emissions) Fault Code: P1196 Common Rail Fuel Pressure – Data Erratic, Intermittent or Incorrect, at Ignition On

PACCAR MX (2004 Emissions) Fault Code: P1196 Common Rail Fuel Pressure – Data Erratic, Intermittent or Incorrect, at Ignition On

SET CONDITIONS:
The PCI ECU (D420) detects that the actual rail pressure drop is less than 140 bar [2030 PSI] since the last ignition switch off event.

DIAGNOSTIC CONDITION:
This diagnostic runs when:
1. The engine is not running and
2. The ignition is keyed on after it has been off for more than 200 seconds and
3. Fuel temperature is lower than the fuel temperature at the previous ignition switch off event

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

POSSIBLE CAUSES:
Common rail pressure sensor deviation

ADDITIONAL INFORMATION:
1. For this diagnostic, the actual rail pressure is monitored when the engine is not running.

2. The rail pressure is measured in the common rail by the common rail pressure sensor (F854).

3. When this DTC is active:
– The engine torque is reduced.
– The engine runs in protection mode.
– The engine runs in rail pressure control state: Release valve only.
– The maximum rail pressure is limited to 1300 bar.