P2188

P2188

Lambda Control Adaptation FRAU (lower Load Range) - Below Limit Value

NOTE: The diagnosis is intended to display a negative deviation of more than 30% (leaning) of the lambda control adaptation in the partial load range (FRAU > 0.7).

Diagnostic conditions
- Engine load 15 .. 80%
- Mass air flow via hot-film mass air flow meter 40 ...220 kg/h
- Engine speed 1,040 ... 4760 rpm
- Oxygen sensing in front of catalytic converter active
- Engine temperature > 55.5 degrees C
- No tank ventilation
=>USA: Time after engine starts 250 ...350 s
=>RoW: Time after engine starts 302 ...402 s
- No faults detected for oxygen sensor
- No faults detected for tank vent
- No faults detected for hot-film mass air flow meter

Possible fault causes
- Incorrect main filling signal from hot-film mass air flow meter
- Fuel pressure too high
- Injection valve faulty (dripping)
- Tank vent faulty (does not close completely)

Lambda control adaptation FRAU (lower load range) - above limit value

NOTE: The diagnosis is intended to display a positive deviation of more than 30% (fattening) of the lambda control adaptation in the partial load range (FRAU > 1.3).

Diagnostic conditions
- Engine load 15 .. 80%
- Mass air flow via hot-film mass air flow meter 40 ..220 kg/h
- Engine speed 1,040 ... 4760 rpm
- Oxygen sensing in front of catalytic converter active
- Engine temperature > 55.5 degrees C
- No tank ventilation
=>USA: Time after engine starts 250...350 s
=>RoW: Time after engine starts 302 ...402 s
- No faults detected for oxygen sensor
- No faults detected for tank vent
- No faults detected for hot-film mass air flow meter

Possible fault causes
- Intake system leaking (secondary air)
- Incorrect main filling signal from hot-film mass air flow meter
- Leak in exhaust system
- Fuel pressure too low
- Fuel injector faulty (stuck)
- Fuel pump delivery too low

Lambda control adaptation RKAT (range near idle speed) - above limit value

NOTE:
- The diagnosis is intended to display a positive deviation of more than 6 % (fattening) of the lambda control adaptation in the range near idle speed.
- Opposed adaptation values in connection with misfires indicate that the timing has been changed.

Diagnostic conditions
- Mass air flow < 32 kg/h
- Engine speed < 960 rpm
- Oxygen sensing in front of catalytic converter active
- Engine temperature > 55.5 degrees C
- No tank ventilation
=>USA: Time after engine starts 250 ...350 s
=>RoW: Time after engine starts 302 ...402 s
- No faults detected for oxygen sensor
- No faults detected for tank vent
- No faults detected for hot-film mass air flow meter

Possible fault causes
- Oil filler cap leaking (secondary air)
- Intake system leaking (secondary air)
- Crankcase ventilation leaking (secondary air)
- Incorrect main filling signal from hot-film mass air flow meter
- Leak in exhaust system
- Tank vent faulty (does not close completely)

Lambda control adaptation RKAT (range near idle speed) - below limit value

NOTE:
- The diagnosis is intended to display a negative deviation of more than 6 % (leaning) of the lambda control adaptation in the range near idle speed.
- Opposed adaptation values in connection with misfires indicate that the timing has been changed.

Diagnostic conditions
- Mass air flow < 32 kg/h
- Engine speed < 960 rpm
- Oxygen sensing in front of catalytic converter active
- Engine temperature > 55.5 degrees C
- No tank ventilation
=>USA: Time after engine starts 250...350 s
=>RoW: Time after engine starts 302...402 s
- No faults detected for oxygen sensor
- No faults detected for tank vent
- No faults detected for hot-film mass air flow meter

Possible fault causes
- Incorrect main filling signal from hot-film mass air flow meter
- Fuel pressure too high
- Injection valve mechanically faulty (dripping)
- Tank vent faulty (does not close completely)