PACCAR MX (2004 Emissions) Fault Code: P062B Internal ECU Injector Power Generation – Voltage Too High

SET CONDITIONS:
The internal ECU injector 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:
Clear the fault with the diagnostic service tool. If the fault reoccurs after ignition on, replace the ECU.

ADDITIONAL INFORMATION:
1. Numerous OBD monitors will not run anymore.
2. Humidity calculation and correction switched off.