P1633

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Loss of performance.

P1633

Fault symptom

•	CHECK ENGINE.

•	Loss of performance.

On-Board Diagnostics

Type of diagnosis:

-	Continuous.

Enable criteria:

-	Turn Ignition On.

-	Battery voltage should be 10.2-15.8 V.

Fault criteria:

-	Voltage on the input exceeds 4.6 V for more than 2.1s.

Dependents:

-

None.

System reaction to a fault:

-	The control module will continue to work with a substitute value of 100 kPa.

-	The following limitations apply: Pedal position sensor adjustable to max 60%, fuel quantity max 20 mm 3 /combustion and glow control.

OK report:

-	Voltage on the input falls below 4.6 V for more than 2.1s.

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

-

Type III.

Diagnostic help

Diagnostics concerns electrical faults on the internal atmospheric pressure sensor.

Functions in the diagnostic tool related to the fault:

-	Read value: Atmosphere Absoslute Pressure

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.