Fault code: 4499 SCANIA

Error identification:

• The injector for cylinder 5 injects too much or too little fuel into the cylinder.

• The torque contribution from cylinder 5 differs greatly from that of other cylinders.

Cause:

• Injector fault.

• Compression too low.

• Fault in the fuel inlet metering valve.

Notes:

The engine control unit switches off the EGR circuit and the engine power is reduced.

Action:

Run Safety precautions for the fuel system.

Run the cylinder output test.

If the test value for cylinder 5 differs greatly from that of the other cylinders, it could be due to low compression or an injector fault. Renew the injector.

If the test result for cylinder 5 does not deviate from the others: Measure the accumulator pressure. If the accumulator pressure oscillates check the fuel inlet metering valve.