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P1182

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Engine may stop after starting, uneven running and misfiring.

P1182


Long Term Fuel Trim Additive. Min Value, Air/Fuel too Rich.


Fault symptoms


CHECK ENGINE.

Engine may stop after starting, uneven running and misfiring.


On-Board Diagnostics

Type of diagnosis:


- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.


Enable criteria:


- Engine running and closed loop active. One multiplicative and one additive adaptation has been performed.


Fault criteria:


- Additive adaptation below -3.33 mg/c for more than 30 s.


Dependents:


- P0116, P0117, P0118, P0131, P0132, P0134, P0444 and P0445.


System reaction to a fault:


- None.


OK report:


- Provided the fault criteria are not fulfilled during the driving cycle the OK report occurs at ignition off before the engine stalls. Two types of OK reports can be given: Type 1: If a DTC is already stored for the diagnosis and similar operating conditions have occurred (coolant temperature above or below 71°C, engine speed 375 rpm and load 10%). Type 2: If there is no DTC stored for the diagnosis or similar operating conditions have not occurred.


Fault handling: (See section Fault handling II, emission-related misfiring or fault in fuel system for more information.)


- Type II.


Diagnostic help

At idling speed, the engine fuel requirement has been 25 % higher than that calculated by the control module on the basis of information from the mass air flow sensor.

Fault diagnosis first determines if the pressure sensors indicate about the same value with the ignition ON, as the mass air flow sensor is then compared with the intake air pressure. If the pressure sensors are OK but the mass air flow sensor value is not correct, then air leaks between the compressor and the throttle are checked for first and then the mass air flow sensor is changed.

If the air quantity is OK, then the fuel supply is checked, i.e. pressure, response, pump flow and finally the injectors.

Functions in the diagnostic tool related to the fault:


Additive adaptation, in mg/c.

Closed loop, unit %.

Purge Adaptation, unit %.

Air mass deviation from calculated, unit %.


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