2013 PACCAR MX-13 – P0486 EGR pressure difference – Data erratic, intermittent, or incorrect at ignition on

Fault code information

2 trip MIL
3 drive cycle recovery
Readiness group – None
Freeze frame type – Comprehensive

Description of component(s)

Location of component(s)

Diagnostic condition

This diagnostic runs continuously when the ignition is on (engine not running).

Set condition of fault code

The PCI ECU (D420) detects that measured EGR pressure difference deviates by more than 5 mbar [0.07 psi].

Reset condition of fault code

This DTC changes to inactive when the fault is no longer detected. To validate the repair, key on the ignition (NO engine start) and wait for 10 seconds to allow the system to power up and the diagnostics to run.

Electrical diagram(s)

Technical data

Possible causes

EGR pressure difference sensor deviation

Additional information

The EGR pressure difference sensor (F751) is monitored against ambient pressure.

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