Diagnostic failure code: P1667
Failure detected: Exhaust gas recirculation system control valve circuit failure
Affected area:
- Interrupted or short-circuited wire in the circuit of the vacuum switching valve for EGR
- Vacuum switching valve for EGR
- Engine electronic control unit
FAILURE-FREE FUNCTION
If one of the following codes are detected, the electronic control unit enters the failure-free mode allowing
the riding of the vehicle with complete safety. If the failure is indicated regularly, the failure-free com-
mand is deactivated. The diagnosis results remain anyway in the memory. It is therefore necessary to
determine if the failure is still there or not.
FAILURE-FREE SPECIFICATIONS
failure codes-1, failure code No. P0105:
Failure detected:When the signal sent by the inlet manifold pressure sensor indicates there is an
interrupted or short-circuited wire.
Failure-free operation:
- The signal sent by the inlet manifold pressure sensor is set to the value established by the throttle
opening angle, engine speed and ISC opening angle
- Ignition timing is set to be controlled according to the pressure determined by the engine speed and
by the above-mentioned value.
- The fuel supply is interrupted if the throttle opening angle and the engine speed exceed the respective
set values.
failure codes-2, failure code No. P0110:
Failure detected: When the signal sent by the intake air temperature sensor indicates there is an
Interrupted or short-circuited wire.
Failure-free operation:
- The signal sent by the intake air sensor is set to a constant value
failure codes-3, failure code No. P0115:
Failure detected: When the signal sent by the engine coolant temperature sensor is open or closed.
Failure-free operation:
- The signal of the engine coolant temperature sensor turns into a constant value.
failure codes-4, failure code No. P0120:
Failure detected:When the signal sent by the throttle position sensor indicates there is an Interrupted
or short-circuited wire.
Failure-free operation:
- The signal sent by the throttle position sensor turns into a constant value.
failure codes-5, failure code No. P0136:
PORTER 1.3 16V Iniection System
IS - 419
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