Diagnostic failure code: P0120
Failure detected: Throttle valve position sensor Failure (TPS) / pedal position sensor / switch "A"
3. It is possible to read different data sent by the
electronic control unit connecting the OBD II gen-
eral scanning device complying with the format
specified by ISO 14230, or the diagnostic tester
DS-21 to the data link connector of the vehicle.
Troubleshooting can be performed efficiently by
controlling these data (failure code, frozen image
data, current data, oxygen sensor monitor data,
etc.).
4. The failure code is formed by the ISO standard
code (specified by ISO 15031-6) and by designa-
tion code of the manufacturer. The ISO standard
code must be set complying with the ISO stand-
ards. On the other hand, the manufacturer desig-
nation code can be freely set by the manufacturer
within a specified limit.
ISO Diagnosis Code Key
1. B: Body C: Chassis P: Propulsor U: Network
2. 0: Regulation 1: Maker
3. Vehicle system
4. Diagnostic failure code digits for example: 1 & 2 : Fuel and air measurement 3 : Ignition
system 7 & 8 : Transmission
5. Many failure codes have a detection logic with two interventions, which avoids the incorrect detection
and which starts working only when there has been an operation failure undoubtedly. Nevertheless,
another mode of diagnosis is determined, for which a single final confirmation test is necessary, so that
the mechanic confirms that the operation failure has been completely removed after the repair. This
mode can be activated with the OBD II general scanning device or with the diagnostic tester DS-21. If
the diagnostic tester DS-21 is used, select "continuous monitoring results" of "vehicle communication
in CARB mode".
Diagnostic failure code: P0141
Failure detected: Oxygen sensor heater circuit failure
Diagnostic failure code: P0171
Failure detected: Fuel trim system too lean
Diagnostic failure code: P0172
Iniection System PORTER 1.3 16V
IS - 402
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