Intermittent code P1130 only?

[brucenoah1956]

I've researched the P1130 code on this board and find that the usual suspect cause is an air leak in the intake or a dirty/bad MAF. I'll start with working on those areas, but have some questions based on what I've read on this board.

My car is a US 2001 Boxster S with Tiptronic @ 22K miles. I've had (4) P1130 code events since last March. Each time I erase the code, it doesn't come back for at least 3 or 4 weeks. The odd thing is that it always comes on at the same place/time. There is a traffic light about 5 miles from my house, just far enough to get the engine fully warm. The CEL came on each time when I've been stopped at that traffic light.

Questions based on what I've read on other topics on this board:

1. If it is a MAF or intake leak, why do I only get an error code for one bank? Wouldn't those affect both sides of the engine? Or might there be some pending codes for opposite bank and my cheap OBDII reader doesn't show them.

2. Other topics on this board mention diganosing problems by disconnecting the MAF. Is the MAF active when the engine is at idle?

3. Any other advice on resolving my P1130 code?

Thanks,

Bruce

[mikefocke]

– Incorrect signal from MAF sensor

– Fuel pressure too high

– Fuel injector leaking

– EVAP canister purge valve open

Since it is on one side only and since some of these causes would seemingly affect both sides, does that narrow things down at all?

[yuyokatana]

I've researched the P1130 code on this board and find that the usual suspect cause is an air leak in the intake or a dirty/bad MAF. I'll start with working on those areas, but have some questions based on what I've read on this board.

My car is a US 2001 Boxster S with Tiptronic @ 22K miles. I've had (4) P1130 code events since last March. Each time I erase the code, it doesn't come back for at least 3 or 4 weeks. The odd thing is that it always comes on at the same place/time. There is a traffic light about 5 miles from my house, just far enough to get the engine fully warm. The CEL came on each time when I've been stopped at that traffic light.

Questions based on what I've read on other topics on this board:

1. If it is a MAF or intake leak, why do I only get an error code for one bank? Wouldn't those affect both sides of the engine? Or might there be some pending codes for opposite bank and my cheap OBDII reader doesn't show them.

2. Other topics on this board mention diganosing problems by disconnecting the MAF. Is the MAF active when the engine is at idle?

3. Any other advice on resolving my P1130 code?

Thanks,

Bruce

Hello I had the same code, and I cleaned the MAF and kapufff code gone!!! Try it.....