Durametric error codes?

[Dharn55]

Workng on my firends 2000 Cab. The Durametric showed the following errors

P1128 Porsche code 360, Oxygen sensing adaptation, idle bank 1

P1130 Porsche code 361, Oxygen sensing adaptation, idle bank 2

How do you tell which sensors are bad? The pre-cat or after cat, and I am assuming that bank 1 is 1-3 and bank 2 is 4-6. We have cleared the codes in the past but they come back after awhile.

[Loren]

Workng on my firends 2000 Cab. The Durametric showed the following errors

P1128 Porsche code 360, Oxygen sensing adaptation, idle bank 1

P1130 Porsche code 361, Oxygen sensing adaptation, idle bank 2

How do you tell which sensors are bad? The pre-cat or after cat, and I am assuming that bank 1 is 1-3 and bank 2 is 4-6. We have cleared the codes in the past but they come back after awhile.

P1128 Oxygen Sensing Adaptation, Idle Range, Bank 1 – Above Limit

P1130 Oxygen Sensing Adaptation, Idle Range, Bank 2 – Above Limit

Possible causes:

– Incorrect signal from MAF sensor

– Intake air system leaking

– Fuel pressure too low

– Volume supply of fuel pump too low

– Fuel injectors fouled

– Exhaust system leaking

The sensors are not bad - the sensors are telling the DME that fuel/air mixture is too lean. The DME has increased the richness to it's maximum threshold.

What this means is that there is either air leaking letting or air into the throttle body or the MAF air readings are wrong.

Use the Durametric to read the MAF.

The MAF should read (for a MY00 996):

At idle -- 12-24 ML in kg/h

At no load (AC off) and 3000 RPM -- 50-80 ML in kg/h

If it does not read within these limits then you can try cleaning the MAF and retesting. If that does not help you will likely need a new MAF.

[rb101]

replacing the MAF fixed those same codes on mine earlier this year.

[Dharn55]

Loren - Thanks for your quick response. We are going to check for leaks and clean the MAF. See if this helps.