P0122

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Loss of performance.

P0122

Fault symptoms

•	CHECK ENGINE.

•	Loss of performance.

On-Board Diagnostics

Type of diagnosis:

-	Continuous.

Enable criteria:

-	Ignition ON.

-	Battery voltage should be 10.2-15.8 V.

-	P1634 or P1635 should not be detected.

Fault criteria:

-	Voltage on input falls below 0.343V for more than 0.56s.

Dependents:

-

None.

System reaction to a fault:

-	The control module will continue to work with a substitute value from pedal position sensor 2. The following limitations apply: Fuel quantity max 30mm 3 /combustion and idling speed set to 1500 rpm.

OK report:

-	Voltage on input exceeds 0.343V for more than 0.52s.

Fault handling: (See section Fault handling III, other emissions-related components and functions for more information)

-

Type III.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault:

-	Read value: Pedal Position Sensor 1, Pedal Position Sensor 2, Pedal Position

See also description of read value under "Read Values" menu for more information.

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.