OBD II Fault Code P1406 :

Description of Fault code P1406

EXHAUST GAS RECIRCULATION (EGR) COOLER BYPASS CONTROL SOLENOID VALVE CIRCUIT OVERHEAT

Possible failuer P1406

• EGR Cooler Bypass valve actuator (Short to power, Electromagnetic Solenoid short)
• EGR Cooler Bypass valve actuator control harness (Short to power between Engine Control Module (ECM) and actuator)
• Engine Control Module (ECM) internal diagnostic circuit failure
• High temperature of Engine Control Module (ECM)

Diagnostic Procedure using AutoHex II Scan Tool

• The overheat (more than 150°C) of the EGR Cooler Bypass valve actuator control circuit is detected for a set period of time.

Test Conditions using AutoHex tester

• Continuously

Clear Fault codes Conditions

• The overheat (more than 150°C) of the EGR Cooler Bypass valve actuator control circuit is detected for a set period of time.

MIL Status

• Check Engine Light ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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