040307
Practice
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Diagnostics
Fault-finding logic, OBD, scopes, multimeters.
Q 1 / 50
diagnostics
L2
What is the practical difference between a 'generic' P0xxx code and a manufacturer-specific P1xxx code?
A
P0xxx codes are reserved for petrol engines only, while P1xxx codes are exclusively used for diesel emissions and aftertreatment faults
B
P0xxx codes are emissions-related and live in the ECU, P1xxx codes are body and chassis codes that live in their own dedicated control modules instead
C
P1xxx codes are always more serious than P0xxx codes and indicate that the MIL must illuminate immediately within one drive cycle
D
P0xxx codes are defined by SAE and have standard meaning across manufacturers; P1xxx codes are manufacturer-specific and need OEM literature
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