HE60 - DTC 1406: Inspect Downstream Pressure Hose Connections

Diagnostic Trouble Code (DTC) 1406 indicates that continuous self-test has detected the intake manifold side (downstream) DPFE pressure hose is off or plugged.

NOTE: If the fault is currently present, DTC 1408 will be output in Key On Engine Running (KOER) Self-Test.

Possible Causes:
- Downstream pressure hose off.
- Downstream pressure hose plugged.
- Orifice tube assembly loose.
- Orifice tube assembly broken.
- Plugged or damaged pressure pickup tubes.
- Slow responding DPFE sensor.

- Key Off.

DPFE Pressure Hoses:

- Inspect downstream hose at DPFE sensor and orifice tube assembly for disconnect or poor connection.

- Is hose OFF or poorly connected?

YES -- RECONNECT downstream hose or SERVICE as necessary. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- GO to HE61. HE61 - Inspect Downstream Pressure Hose For Plugging