Reading OBD2 DTC codes procedure

Question

I am trying to read dtc codes using following procedure:

1 - send 0101 which means get the number of the dtc codes

receive - 41 01 82 07 61 01 which means I have 2 trouble codes

2 - send 0x03 to receive codes and

receive - 43 01 33 03 01 00 00 which are the 2 codes : P0133 and P0301

Using a diagnostic service tester I get 5 codes on the same car: P0133, P0301 (the ones I get also) and P0303, P0300 and C1513

How can I see the other 3 codes using my OBD?

Here are pictures with the tester:

Answer 1

You might have multiple OBD2-conform ECUs in your car. To access these, use broadcast addressing or query each and every one separately by adjusting your arbitration ids.

That said, some readers may also show pending (0x07) or permanent (0x0A) DTCs.