PACCAR MX (2004 Emissions) Fault Code: P1571 Engine Oil Temperature – Data Erratic, Intermittent, or Incorrect
PACCAR MX (2004 Emissions) Fault Code: P1571 Engine Oil Temperature – Data Erratic, Intermittent, or Incorrect
SET CONDITIONS:
The PCI ECU (D420) detects that the measured oil temperature differs too much from the expected oil temperature for more than 300 seconds.
DIAGNOSTIC CONDITION:
This diagnostic runs 60 seconds after an engine start, and when the coolant temperature is more than 65?C [149?F].
CORRESPONDING OBD READINESS MONITOR:
None
RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.
REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful
POSSIBLE CAUSES:
Oil temperature sensor deviation
ADDITIONAL INFORMATION:
1. For this diagnostic, the engine oil temperature is compared with the engine coolant temperature when the engine is at normal operating temperature.
2. The oil temperature is monitored by the oil temperature sensor (F808), and the engine coolant temperature is monitored by the coolant temperature sensor (F566).
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