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2003 Cadillac CTS


Dhouch

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Normally diagnostic trouble codes (DTCs) are formed of a letter, such a P, with a 4-digit number, like this: P2575

The first digit of the 4-digit number is 0 for generic, or a 1 or a 2 for Manufacturer specific.

The sequences you gave

ARS 257521119093

IPC 25742938 2246

are possibly P2575 and P2574 with extra information added?

I assume these came from a scan tool? or from the 2003 on-board diagnostics?

Not sure what the ARS system is. IPC relates to the instrument panel cluster

I did find one reference http://www.myazcar.com/pdf/2008_DLC_diag_codes.pdf that suggests:

P2574 Direct Ozone Reduction Catalyst Deterioration SensorCircuit Low

P2575 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High

which would tie these two together to the same problem.

Bruce

2016 Cadillac ATS-V gray/black

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