codes definition
#1
04-01-2005, 10:46 AM
Join Date: Aug 2003
Location: SAN FRANCISCO
Age: 57
Posts: 372
Rep Power: 39 
codes definition
p0491
p0492
any know what they are
boris
p0492
any know what they are
boris
Last edited by calbobba996TT; 04-01-2005 at 11:12 AM.
That's just a guess....
#3
04-01-2005, 01:03 PM
Join Date: Aug 2003
Location: SAN FRANCISCO
Age: 57
Posts: 372
Rep Power: 39
#4
04-01-2005, 06:22 PM
P0491
Secondary Air Injection System, Bank 1 – Below Limit
Diagnosis conditions
• Intake air temperature 4.5 - 60 °C
• Engine temperature 4.5 - 102 °C
• Mass air flow 36 - 150 kg/h
• Engine starting temperature less than 42 °C
• Altitude correction factor greater than 0.75
• Oxygen sensors 1 and 2 ahead of TWC are ready for operation
• The secondary air injection pump is switched on
• Diagnosis has not yet taken place during this cycle
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking
Affected terminals
III/11 and III/14
Secondary Air Injection System, Bank 1 – Below Limit
Diagnosis conditions
• Intake air temperature 4.5 - 60 °C
• Engine temperature 4.5 - 102 °C
• Mass air flow 36 - 150 kg/h
• Engine starting temperature less than 42 °C
• Altitude correction factor greater than 0.75
• Oxygen sensors 1 and 2 ahead of TWC are ready for operation
• The secondary air injection pump is switched on
• Diagnosis has not yet taken place during this cycle
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking
Affected terminals
III/11 and III/14
#5
04-01-2005, 06:23 PM
P0492
Secondary Air Injection System, Bank 2 – Below Limit
Diagnosis conditions
• Intake air temperature 4.5 - 60 °C
• Engine temperature 4.5 - 102 °C
• Mass air flow 36 - 150 kg/h
• Engine starting temperature less than 42 °C
• Altitude correction factor greater than 0.75
• Oxygen sensors 1 and 2 ahead of TWC are ready for operation
• The secondary air injection pump is switched on
• Diagnosis has not yet taken place during this cycle
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking
Affected terminals
III/11 and III/14
Secondary Air Injection System, Bank 2 – Below Limit
Diagnosis conditions
• Intake air temperature 4.5 - 60 °C
• Engine temperature 4.5 - 102 °C
• Mass air flow 36 - 150 kg/h
• Engine starting temperature less than 42 °C
• Altitude correction factor greater than 0.75
• Oxygen sensors 1 and 2 ahead of TWC are ready for operation
• The secondary air injection pump is switched on
• Diagnosis has not yet taken place during this cycle
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking
Affected terminals
III/11 and III/14
I hate that thing... sorry man I didn't get in till late.
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#8
04-01-2005, 08:10 PM
How about checking the vacuum line to the diverter valves? That will throw the same code and the lines often rub on the oil filter console.
#9
04-02-2005, 01:31 PM
Join Date: Aug 2003
Location: SAN FRANCISCO
Age: 57
Posts: 372
Rep Power: 39 
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