PACCAR MX (2004 Emissions) Fault Code: P0563 PCI ECU Power Supply – Data Valid but Too High on ECU (D420) Pin (B60) or Pin (B61) or Pin (B62)
PACCAR MX (2004 Emissions) Fault Code: P0563 PCI ECU Power Supply – Data Valid but Too High on ECU (D420) Pin (B60) or Pin (B61) or Pin (B62)
SET CONDITIONS:
The ECU power supply voltage is too high.
DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the ignition is on.
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?
– No, repair successful
– Yes, repair unsuccessful
POSSIBLE CAUSES:
Check the power supply level.
ADDITIONAL INFORMATION:
Numerous diagnostics will not run anymore.
