P1633

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE goes on after two driving cycles.

P1633

Fault symptoms

•	CHECK ENGINE goes on after two driving cycles.

Conditions

The following conditions apply for this DTC:

•	Engine running.

•	Voltage from atmosphere absolute pressure sensor above 4.920 V for longer than 5 sec.

Diagnostic help

Fault diagnosis concerns internal control module fault as the sensor is integrated in the control module.

Functions in the diagnostic tool related to the fault:

•	Pressure sensor value, unit kPa.

The value should correspond with that of the other two pressure sensors when the engine is stationary. Accepted deviation: 10 kPa.

See also description of test readings, , 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.