P0243

Read the instructions below then start the fault diagnostic procedure.

Symptom: Black smoke from exhaust pipe Loss of performance

P0243

Fault symptoms

•	Black smoke from exhaust pipe

•	Loss of performance

On-Board Diagnostics

Type of diagnosis:

-	Continuous.

Enable criteria:

-	Battery voltage should be 10.2-15.8 V.

-	Engine speed should be over 1700 rpm.

-	Rpm changes between two measurements should not exceed a difference of 100 rpm.

-	The difference between two injections should not exceed 5 mm 3 /C.

-	EGR control should be 0%.

-	Gear engaged.

-	Speed should be over 40 km/h.

-	Injection quantity should be 20-60 mm 3 /C.

-	Intake air temperature should be 20-90 °C.

-	Atmospheric pressure should be 90-110 kPa.

-	P1636 or P1637 should not be detected.

-	These conditions should be fulfilled for 2.1 seconds before diagnostics run.

Fault criteria:

-	The difference between calculated and actual charge air pressure exceeds 70 kPa.

Dependents:

-

P0106.

System reaction to a fault:

-

None.

OK report:

-	Fault criteria not fulfilled.

Fault handling:

-	Fault handling III, other emissions-related components and functions

Diagnostic help

Fault diagnosis focuses on leakage in the induction system, the malfunction of the charge pressure sensor and mass air flow sensor, and leakage on the exhaust side between the engine and turbo.

Functions in the diagnostic tool related to the fault:

-	Read value: Airmass / Combustion, Mass Air Flow Sensor, Requested VNT Position, Actual VNT Position, Requested Charge Air Absolute Pressure, Charge Air Absolute Pressure ( Charge Air Pressure Sensor)

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