limp mode

2002 MITSUBISHI MONTERO
90,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PVTNALL78
  • MEMBER
  • 2 POSTS
this is the codes it gave us : 0431, 0174, 0154, 0421, 0171, 0134, 0341 it also said most were pd (pending) codes for most of them
Aug 9, 2011 at 5:15 AM
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KHLOW2008
  • CAR REPAIR CONTRIBUTOR
  • 41,814 POSTS
0134 - Right front HO2S circuit no activity detected ( Bank 1 Sensor 1)
0154 - Left front HO2S circuit no activity detected ( Bank 2 Sensor 1)
0171 - Right bank too lean (Bank 1)
0174 - Left bank too lean (Bank 2)
0341 - Not found in list , can you reconfirm?
0421 - Right warm up catalyst efficiency below threshold (Bank 1)
0431 - Left warm up catalyst efficiency below threshold (Bank 2)

Problem seems to be from the HO2S circuit. Check for battery voltage to the sensors with ignition switch turned on.
Aug 9, 2011 at 11:33 AM
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