Code P1130, P1128 and P0134

[blue62]

Originally Posted by Laredo

Hello everyone,

I have a base 2002 Porsche Boxster which I purchased about 6 months ago. the vehicle has 62,000 miles. recently the check engine light went on and the scanner showed the codes P1128 (Bank 1), P1130 (Bank 2) and P0134 (Bank 1, sensor 1) this codes were obtained in Auotozone, shortly after that, the ABS light came on and the PCB lights, but this failure is intermittent.

The reality is that if it weren't for the light you wouldn't notice any fault, except for the absence of the ABS.

I took the car with Porsche’s dealer and they recommend changing the 4 oxygen sensors, during my visit I noticed that their records indicate they changed the oil separator about 6 months ago.

I decided to read a bit in this forum and I have doubts about the diagnosis. I opened the oil cap and the suction is minimal. I have the doubt if the problem is the oil separator even if the suction is not increased? I am concerned the O2 sensor aren’t the problem, Is it an open circuit suction problem or is it the MAF sensor?

I would appreciate any suggestion from the members of this forum since you have more experience, cordial greeting to the group.

The P0134 code is telling you that the DME/ECU is not getting any signal from the sensor.
So the sensor is dead or you have an issue with the wiring from the DME to the sensor.
Most likely a wiring issue.
I would look at the wiring connection at the sensor and the sensor wiring harness.

The other two codes are telling you that you have reached the rich mixture threshold.
So the DME/ECU is adding all the fuel it can. You most likely have Vacuum leak.

[Laredo]

Thank you very much for your response, blue62.

I appreciate it, regards.

Any suggestions for the ABS light? Could it be the battery?
The dealers scanner couldn’t detect any code, the light was out at the moment.

[blue62]

Originally Posted by Laredo

Thank you very much for your response, blue62.

I appreciate it, regards.

Any suggestions for the ABS light? Could it be the battery?
The dealers scanner couldn’t detect any code, the light was out at the moment.

Sorry no ideas on the ABS light.

[78F350]

I had ABS and PSM lights after about 15 to 30 minutes of driving and the cause was a faulty switch on the brake pedal. Does your Cruise Control work? Mine didn't until I replaced that switch.
Here's the replacement guide: https://www.pelicanparts.com/techarticles/Boxster_Tech/93-ELEC-Pedal_Switches/93-ELEC-Pedal_Switches.htm

For the other issue, I'm guessing MAF sensor is bad. If it hasn't ever been replaced, a new one wouldn't be a bad idea anyway. Go with a genuine Bosch, do not try a generic bargain.

[Laredo]

thanks 78f350

If the ABS light is on the scanner could read a code or something?

A faulty switch in the brake pedal goes with a stop brake light malfunction?

[78F350]

Originally Posted by Laredo

thanks 78f350

If the ABS light is on the scanner could read a code or something?

A faulty switch in the brake pedal goes with a stop brake light malfunction?

In my case it took months for me to figure it out because the brake light still worked. A scanner would have to be capable of reading the ABS module to get a code. Many of the inexpensive ones only read the engine module.

In addition to what Blue62 said about simple tests with a multimeter for the P0134, you can also try swapping the O2 sensors from one side to the other and see if the problem moves.

Are you familiar with the reference of 'bank 1, sensor 1'? That's the most forward O2 sensor on the right side.

[blue62]

Originally Posted by 78F350

In my case it took months for me to figure it out because the brake light still worked. A scanner would have to be capable of reading the ABS module to get a code. Many of the inexpensive ones only read the engine module.

In addition to what Blue62 said about simple tests with a multimeter for the P0134, you can also try swapping the O2 sensors from one side to the other and see if the problem moves.

Are you familiar with the reference of 'bank 1, sensor 1'? That's the most forward O2 sensor on the right side.

I agree that you could test the O2 sensor by swapping it from one side to the other.
But that is a lot of work compared to testing it and associated wiring with a multimeter which only takes a few minutes. And no wrenching involved

[Laredo]

Thank you very much for all your help!!

I am looking for MAF sensor and they ask me if my car has a M620 e-accelerator or not?
How can I determine it?

I appreciated all the assistance