SAAB WIS ONLINE

T8 / P0121 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Cruise control not working. Limp home

  P0121 00


Throttle Position Sensor 1 Circuit. Out of Range.

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

Cruise control not working.

Limp home

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

When the ECM is awake, diagnosis is active (even with the ignition off).
NONE of the following DTCs must be detected:
P0122, P0123

Fault criteria:

When voltage on the input is outside the interval 0.28 V - 4.7 V.

Dependent:

None

System reaction to a fault:

Correction of mass air flow/combustion for fuel calculation is blocked.
Limited acceleration and idle function.
Cruise control blocked.
Secondary air switched off.

OK report:

Fault criterion not fulfilled and vehicle speed over 0 km/h for more than 60 s.

Fault handling:

Type III
(See section Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness

Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or component.
If DTC P0122 or P0123 is generated, P0121 is cleared.
The sum of sensors 1 & 2 must be 5 V with ignition on and engine running.

Functions in the diagnostic tool related to the fault:

Test value:
Throttle Position Sensor 1
Throttle Position Sensor 2

(See also description of readings/activations in diagnostic tool)