P1182
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
Engine may stop straight after starting, run unevenly and misfire.
Long Term Fuel Trim Additive. Min Value, Air/Fuel too Rich.
Fault symptoms
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Engine may stop straight after starting, run unevenly and misfire.
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On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
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Engine running and closed loop active. One multiplicative and one additive adaptation performed.
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Fault criteria:
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Additive adaptation below -3.33 mg/c for more than 30s.
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Dependents:
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P0115, P0116, P0117, P0118, P0119, P0131, P0132, P0134, P0444, P0445 and P1133.
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System reaction to a fault:
OK report:
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On condition that 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
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Fault handling:
(See “Fault diagnosis, general” for more information.)
Diagnostic help
When idling the need of fuel to the engine has been 3.33 mg/c less than that which the control module had calculated with the information received 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:
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Additive adaptation, unit mg/c.
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Purge Adaptation, unit %.
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Air mass deviation from calculated, unit %.
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See also the description of test values under ”Fault diagnosis, general” for more information.
