Electronic control module????help

[wannagofast]

Does anyone know how to replace to electronic control module and about how much they run??The check engine light is constantly on the shop we took it to said it is either a exhaust leak or since there are so many codes showing it could be the module itself? Porsche Boxster 1999

[Jager]

What are the trouble code numbers? I doubt it's the control module, but the module is located in the trunk mounted behind the carpet on the front wall.

Provide some vehicle history:
How many miles on the vehicle?
Any modifications (intake or exhaust)?
Last time the spark plugs were changed?
Ever replaced the AOS?
Ever replaced the O2 sensors?
Ever replaced the gas cap?
Ever replaced the MAF sensor?

Members of this forum can't be of much help unless you provide the trouble codes and explain conditions.

[wannagofast]

TROUBLE CODES:
P1124,P1126. P0446, P0455,P1319,P1318,P1317,P1316,P1315,P1314,P1313
Provide some vehicle history:
How many miles on the vehicle? 112,000
Any modifications (intake or exhaust)? NONE
Last time the spark plugs were changed? NOT YET will change myself tomorrow morning.
Ever replaced the AOS? not yet
Ever replaced the O2 sensors? Not yet
Ever replaced the gas cap? Not yet
Ever replaced the MAF sensor?not yet
Other history points: prior owner did not take care of car, I have changed the oil found the dip stick was broken, replaced waterpump it was cracked, changed engine filter to a K AND N filter, car has a sporadic idle at times not constant, need to change rear and front struts. Recent sewed up the top myself leaked water into rear of seats caused the air bag dash light to keep coming on wires were really wet. Any help on codes is greatly appreciated.

[JFP in PA]

Something is peculiar here, a 99 Boxster should carry a 5.2.2 DME, but some of these codes are for the 7.2 DME, which is from a 01-02 "S" model Boxster.

That said, P1124 and 1126 are O2 sensor (both banks are lean); P0446 and 0455 are EVAP system codes (massive vacuum leak in EVAP system); P1313 to P1319 are cylinder misfire codes.

Considering the EVAP system leak codes, the O2 sensor codes make sense; the misfire codes may also relate to the lean conditions.

[Jager]

This could be a fun one... You need to verify the electronics. Remove the trunk front panel by removing the three plastic retainers and pull back the carpet to expose the control module. How many connectors does it have? The DME 5.2.2 has a 88-pin connector and the DME 7.2 has 5 connectors (A 9-pin, B 24-pin, C 52-pin, D 40-pin, E 9-pin. I would be very surprised if someone upgraded the system to a 7.2 DME.

After changing the plugs do an AOS test by taking the oil fill cap off while the engine is running and warmed-up. Is the oil fill cap hard to take off? Does the idle drop where the motor almost dies?

[wannagofast]

Just got thru with left side spark plugs now working on right side. After all this I will check which DME is in the car??? I will let you know my findings.....

[Jager]

So you are going to replace the tube seals later?