2020 Subaru Forester P code Page 217

P2442

DTC P2442 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN (BANK2)

1. OUTLINE OF DIAGNOSIS

Detect NG judging from secondary air delivery pipe pressure, pulse of secondary air delivery pipe pressure and secondary air pipe airflow

P2442

P2442
The secondary air valve (cylinder bank 2) is jammed open. (P2442)
Possible cause:
­ Y32 (Air pump switchover valve)
Affected functions:
­
Engine diagnosis
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Test 1: Check component Y32 (Air pump switchover valve).
1. Check component Y32 (Air pump switchover valve).
Test 1.1: Test actuation of component Y32 (Air pump switchover valve).
Test 1.2: Test current consumption of component Y32 (Air pump switchover valve).
1.1. Test actuation of component Y32 (Air pump switchover valve).
Test sequence
­
­
Operate engine at idling speed.
Actuate component Y32 (Air pump switchover valve).(Actuate with key F2.)2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Warning!Communication with ECU required.
1.2. Test current consumption of component Y32 (Air pump switchover valve).
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
­
­
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Test prerequisite
­ The actuation was not okay.
Test sequence
­ Switch off ignition.
­ Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
­ Measure direct current with multimeter between sockets (F.4) 100 and [M.53] 53 of the 126­pole socket box tester.
­ Switch on ignition.
Specified value
­ Amperage[0.3...0.6] A
Question
­
Is the measurement value OK?
Page 2212010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 222
YES
The measurement value is OK.End of test
NO
The measurement value is not OK.Possible cause and remedy
­ K40/4f44 (Fuse 44)
­ K40/4kM (Circuit 30z relay)
­ Line between component N3/10 (ME­SFI [ME] control unit) and component Y32 (Air pump switchover valve)
­ Line between component K40/4 (Front passenger fuse and relay module) and component Y32 (Air pump switchover valve)
­ Y32 (Air pump switchover valve)
End of test