P0121

P0121 00

Throttle Position Sensor 1 Circuit. Out of Range.







Fault symptom
CHECK ENGINE
Cruise control not working.
Limp home

On-board diagnosis

Type of diagnosis:
Continuous

Enable criteria:
Ignition ON.
NONE of the following DTCs must be detected: P0122, P0123, P2135

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 Description of On-Board Diagnostics/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
If DTC P0122 or P0123 is generated, P0121 is cleared.