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Old 04-20-2011, 06:00 AM   #5
paulv
Registered User
 
Join Date: Apr 2006
Location: Boston, MA
Posts: 221
diag info

Diagnosis conditions
• TWC temperature 420 - 600 °C
• 85 seconds within rpm/load range (cumulative)
• EVAP canister burden < 8
• Speed 1280 - 2440 rpm
• 20 - 40 % engine load (relative air charge)
• Oxygen sensing ahead of TWC is active
• Oxygen sensing after TWC ready for operation
• Engine starting temperature > - 20 °C
• No faults in memory
Possible fault cause
♦ Oxygen sensor ahead of and after TWC exchanged
♦ Valve lift fault
♦ Aged oxygen sensor after TWC
♦ TWC faulty


HTH

Regards,
paul...
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