PACCAR MX (2004 Emissions) Fault Code: P1570 Engine Oil Temperature – Data Erratic, Intermittent or Incorrect, During Engine Warm-Up

PACCAR MX (2004 Emissions) Fault Code: P1570 Engine Oil Temperature – Data Erratic, Intermittent or Incorrect, During Engine Warm-Up

SET CONDITIONS:
The PCI ECU (D420) detects that the measured oil temperature differs too much from the expected oil temperature at the moment the coolant temperature reaches 74?C [165?F].

DIAGNOSTIC CONDITION:
This diagnostic runs 60 seconds after an engine start, and when the coolant temperature is more than 40?C [104?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 warming up.

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).