P0271

Read the instructions below then start the fault diagnostic procedure.

Symptom: Black smoke from exhaust pipe CHECK ENGINE. Engine turns off.

P0271

Fault symptom

•	Black smoke from exhaust pipe

•	CHECK ENGINE.

•	Engine turns off.

On-Board Diagnostics

Type of diagnosis:

-	Continuous.

Enable criteria:

-	Engine running.

-	Battery voltage must be above 11V.

Fault criteria:

-	The diagnosis has detected a fault for longer than 0.56s on the low level cable to injector 4 / ground cable to injector 4.

Dependents:

-

None.

System reactions to a fault:

-	Engine turns off.

OK report:

-	Fault criteria not fulfilled.

Fault handling:

-	CHECK ENGINE lights in first driving cycle.

Diagnostic help

Activate nozzles. NB! Make sure there are no open circuits or short circuits to ground/B+ in the communication cable between the control module and the power stage before activating. The power stage can be damaged if activation takes place in these circumstances.

For more information on DTCs and wiring faults concerning the power stage, see Power stage, DTCs/cable faults .

Refer also to the description of readings in Menu "Read Values" for more information.

Checking the wiring harness

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.