[Socket]

Wondering if anyone can interpret these codes and help explain the surging problem

These from the MHD code reader

3100 boost pressure control, deactivation
2C7C Lamba probe behind cat converter 2, signal
2ABC Changing pressure sensor, electrical

Shadow codes
2FA3 Code missing
2FCA Unknown code
2FDA Unknown code
2FDB Unknown code
29F4 Catalytic converter conversion
29F5 Catalytic converter conversion 2

Running catless DPs

[vtl]

2abc is the code when you max out the map sensor.
Also have a secondary o2 sensor that's possibly faulty

Mhd is a poor code reader, really need to use INPA, as error codes have more than just a code, they have mileage and ambient conditions which help you in your diagnosis.

[Socket]

Originally Posted by vtl

2abc is the code when you max out the map sensor.
Also have a secondary o2 sensor that's possibly faulty

Mhd is a poor code reader, really need to use INPA, as error codes have more than just a code, they have mileage and ambient conditions which help you in your diagnosis.

Thats odd I have the 3.5 Tmap boost sensor?
I thought it could handle up to 25 psi?
Is the secondary cat O2 sensor important to engine management? I thought it was only the precats that played a signifcant role after going catless?

[vtl]

Originally Posted by Socket

Thats odd I have the 3.5 Tmap boost sensor?
I thought it could handle up to 25 psi?
Is the secondary cat O2 sensor important to engine management? I thought it was only the precats that played a signifcant role after going catless?

That's why you need mileage data, don't know when the codes happened or whether it's responsible for the limp mode. Could have been when you were driving your n20 with the wrong time when you got the jb4 installed.

Secondary o2s don't do much but if they're faulty they cause error codes. I had an exhaust leak at the downpipe->exhaust flange and got secondary o2 codes.

[Socket]

Originally Posted by vtl

That's why you need mileage data, don't know when the codes happened or whether it's responsible for the limp mode. Could have been when you were driving your n20 with the wrong time when you got the jb4 installed.

Secondary o2s don't do much but if they're faulty they cause error codes. I had an exhaust leak at the downpipe->exhaust flange and got secondary o2 codes.

I see... thanks mate
Ill pop around one night after work and see if we can plug it into your magic lappy lel