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Fuel and air ratio

DTC Error Message Diagnostic Procedure Malfunction Criteria and Threshold Value Secondary Parameters with Enable Conditions Monitoring Time Length Frequency of checks, MIL Illum
P2101 Throttle Actuator Control Motor Circuit Range/Performance -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING .
  • Duty cycle >80%
  • AND
  • ECM power stage, no failure
  • deviation throttle valve angles vs calculated value, 4.0...50.0%
 ---
  • 5 Sec
  • 5 Sec
  • multiple
  • 2 DCY
P2106 Throttle Actuator Control System - short to B+ or ground -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING .
  • internal check
 --- 0.2 Sec
  • Continuous
  • 2 DCY
P2106 Throttle Actuator Control System Open circuit -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING .
  • internal check
  • duty cycle, >80%
  • OR
  • deviation throttle valve angles vs calculated value, 4.0...50.0%
 0.2 Sec
  • Continuous
  • 2 DCY
P2106 Throttle Actuator Control System temp./current monitoring -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING .
  • internal check, failed
 --- 0.2 Sec
  • Continuous
  • 2 DCY
P2106 Throttle Actuator Control System Functional check -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING .
  • internal check, failed
 --- 0.2 Sec
  • Continuous
  • 2 DCY
P2110 Throttle Actuator Control System - Forced Limited RPM -- Check the Throttle Valve Control Module -J338-. Refer to THROTTLE VALVE CONTROL MODULE, CHECKING . Engine load Out of range --- ---
  • 2 DCY
P2122 Throttle/Pedal Position Sensor/Switch D Circuit Low Input -- Check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to ACCELERATOR PEDAL POSITION SENSOR/ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING . Signal voltage < 0.646 V --- 0.20 Sec
  • Continuous
  • 2 DCY
P2123 Throttle/Pedal Position Sensor/Switch D Circuit High Input -- Check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to ACCELERATOR PEDAL POSITION SENSOR/ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING . Signal voltage >4.794 V --- 0.20 Sec
  • Continuous
  • 2 DCY
P2127 Throttle/Pedal Position Sensor/Switch E Circuit Low Input -- Check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to ACCELERATOR PEDAL POSITION SENSOR/ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING . Signal voltage < 0.276 V --- 0.20 Sec
  • Continuous
  • 2 DCY
P2128 Throttle/Pedal Position Sensor/Switch E Circuit High Input -- Check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to ACCELERATOR PEDAL POSITION SENSOR/ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING . Signal voltage >2.431 V --- 0.20 Sec
  • Continuous
  • 2 DCY
P2138 Throttle/Pedal Position Sensor/Switch D / E Voltage Correlation -- Check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to ACCELERATOR PEDAL POSITION SENSOR/ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING .
  • Signal voltage sensor 1 vs 2, > 0.143...0.703 V
  • signal voltage sensor 1, > 445.0 mV
  • signal voltage sensor 2, > 445.0 mV
  • 0.24 Sec
  • Continuous
  • 2 DCY
P2146 Fuel Injector Group A Supply Voltage Circuit / short to ground -- Check the Fuel injectors -N30, N31, N32, N33-. Refer to FUEL INJECTORS, CHECKING . short to ground (high side)
  • Signal current, >14.90 A
short to battery plus (high side)
  • signal current< 2.60 A
  • core connection (high side - low side)
  • Engine speed >80 RPM
  • Engine speed >80 RPM
  • low side signal current> 2.70A
  • engine speed> 80 RPM
 0.5 Sec
  • Continuous
  • 2 DCY
P2149 Fuel Injector Group B Supply Voltage Circuit / Short to ground -- Check the Fuel injectors -N30, N31, N32, N33-. Refer to FUEL INJECTORS, CHECKING . short to ground (high side)
  • Signal current, >14.90 A
short to battery plus (high side)
  • signal current< 2.60 A
  • Engine speed >80 RPM
  • Engine speed >80 RPM
  • low side signal current> 2.70A
 0.5 Sec
  • Continuous
  • 2 DCY
P2177 Fuel System -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . system too lean @ part load
  • adaptive value> 26 %
  • engine speed 960... 5040 RPM
  • engine load 20... 100%
  • mass air flow 27... 450kg/h
  • air flow ECT > 54.8°C
  • IAT < 90[°C]
  • lambda control closed loop
  • evap purge valve closed
  • if low fuel signal then wait until fuel consumption > 0.0
 10 Sec
  • multiple
  • 2 DCY
P2178 Fuel System -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . system too rich @ part load
  • adaptive value< 26%
  • engine speed 960... 5040 RPM
  • engine load 20... 100%
  • mass air flow 27... 450kg/h
  • air flow ECT > 54.8°C
  • IAT < 90[°C]
  • lambda control closed loop
  • evap purge valve closed
 10 Sec
  • multiple
  • 2 DCY
P2181 Cooling System Performance -- Check Engine Coolant Temperature (ECT) Sensor -G62-. Refer to ENGINE COOLANT TEMPERATURE SENSOR, CHECKING .-- Check the Coolant Pump -V50- Refer to the appropriate service information.-- Check the Coolant Thermostat. Refer to the appropriate service information..
  • cooling system temperature to low after a sufficient air mass flow integral55...80° C
 threshold 01:
  • begin of air mass integration when engine temp.> 30° C
  • ECT @ start-6.7... 60° C
  • AAT> -6.74° C
  • fuel cut offnot active
AIRMASS 01:
  • integrated air mass depending on engine temp. at start and AAT4.5... 15.0kg/h
  • accum. fuel cut off< 40...250 Sec
  • delta ambient temp.< 1.7kPa
  • average air mass flow23.0... 180.0kg/h
  • average vehicle speed33.4... 120.0 km/h
 1000 Sec
  • once
  • 2 DCY
P2187 Fuel System -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . system too lean @ idle
  • adaptive value> 5.02%
  • engine speed< 520...960 RPM
  • engine load< 9...45 %
  • mass air flow< 5...23 kg/h
  • ECT> 54.8° C
  • IAT< 90° C
  • delta part load adaptationready
  • lambda controlclosed loop
  • evap purge valveclosed
  • if low fuel signal then wait until fuel consumption> 0
 10 Sec
  • multiple
  • 2 DCY
P2188 Fuel System -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . system too rich @ idle
  • adaptive value< 6.00%
  • engine speed< 520...960 RPM
  • engine load< 9...45 %
  • mass air flow< 5...23 kg/h
  • ECT> 54.8° C
  • IAT< 90° C
  • delta part load adaptationready
  • lambda controlclosed loop
  • evap purge valveclosed
 10 Sec
  • multiple
  • 2 DCY
P2181 Cooling System Performance -- Check Engine Coolant Temperature (ECT) Sensor -G62-. Refer to ENGINE COOLANT TEMPERATURE SENSOR, CHECKING .-- Check the Coolant Pump -V50- Refer to the appropriate service information.-- Check the Coolant Thermostat. Refer to the appropriate service information..
  • cooling system temp too low after a sufficient air mass flow interval, 55...80° C
  • begin of mass integration when engine temp, >30° C
  • ECT at start, -6.7...64° C
  • ambient air temp, > -6.7° C
  • fuel cut-off not active
  • delta ambient pressure, <1.5 hPa
  • integrated air mass depending on engine temp at start and ambient air temp, 4.5...15 kg/h
  • accumulated fuel cut-off time, <40...250 Sec
  • average vehicle speed, 33.4...120 km/h
 1000 Sec
  • once/DCY
  • 2 DCY
P2195 O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1 -- Check the Heated Oxygen Sensor (HO2S) -G39-. Refer to HEATED OXYGEN SENSOR HO2S, CHECKING .
  • delta lambda of 2nd lambda control loop, >0.070
  • modeled exhaust gas temp., 450.00... 880.00° C
  • exhaust gas mass flow, 18... 200 kg/h
  • lambda control, closed loop
  • 2nd lambda control, closed loop
  • O2S front, ready, no fault
  • O2S rear, ready, no fault
  • O2S heater front, ready, no fault
  • O2S heater rear, ready, no fault
  • fuel cut off, not active
  • catalyst heating, not active
  • SAI, not active
  • Case 1: 1st lambda control loop, not at min or max limit
  • 2nd lambda control loop, active
  • Case 2: 1st lambda control loopat min limit.
  • O2S front< 1.0
  • O2S rear voltage< 0.4 V
  • Case 3: 1st lambda control loopat max limit
  • O2S front> 1.0
  • O2S rear voltage> 0.6 V
  • 140 Sec
  • multiple
  • 2 DCY
P2196 O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1 -- Check the Heated Oxygen Sensor (HO2S) -G39-. Refer to HEATED OXYGEN SENSOR HO2S, CHECKING .
  • delta lambda of 2nd lambda control loop, < 0.07
  • modeled exhaust gas temp., 450.00... 880.00° C
  • exhaust gas mass flow, 18... 200 kg/h
  • lambda control, closed loop
  • 2nd lambda control, closed loop
  • O2S front, ready, no fault
  • O2S rear, ready, no fault
  • O2S heater front, ready, no fault
  • O2S heater rear, ready, no fault
  • fuel cut off, not active
  • catalyst heating, not active
  • SAI, not active
  • Case 1: 1st lambda control loop, not at min or max limit
  • 2nd lambda control loop, active
  • Case 2: 1st lambda control loopat min limit.
  • O2S front< 1.0
  • O2S rear voltage< 0.4 V
  • Case 3: 1st lambda control loopat max limit
  • O2S front> 1.0
  • O2S rear voltage> 0.6 V
  • 140 Sec
  • multiple
  • 2 DCY
P2231 O2 Sensor Signal Circuit Shorted to Heater Circuit -- Check the Oxygen Sensor (O2S) Heater -Z19-. Refer to OXYGEN SENSOR O2S HEATER, CHECKING . Delta O2S signal front, >190uA
  • Engine speed, <2700 RPM
  • engine load, <60%
  • heater duty cycle, 20.0...80.0%
  • Modeled exhaust, <800.1° C
  • lambda set value READ ERROR
  • lambda, 0.95...1.05
  • O2S Heater no fault
 15 Sec
  • multiple
  • 2 DCY
P2237 O2 Sensor Positive Current Control Circuit / Open - Bank 1, Sensor 1 -- Check the Heated Oxygen Sensor (HO2S) -G39-. Refer to HEATED OXYGEN SENSOR HO2S, CHECKING .
  • lambda set value< 0.97
  • OR
  • O2S signal front1.49... 1.51 and lambda set value> 1.03 V
  • O2S signal front< 1.70 V and fuel cut off > 3.00 Sec
  • O2S signal front1.49... 1.51 V and delta lambda controller> 0.10
  • O2S ceramic temp, >715° C
  • Lambda control, Closed loop
  • Mass air integral, > 0.8 kg
  • O2S ceramic temp, >715 °C
  • electrical adjustment, not active
  • heater control, closed loop
  • EVAP purge valve, ready no fault
  • O2S ceramic temp, >715° C
  • Lambda modulation >0.01
  • Lambda control, Closed loop
  • heater controlclosed loop
  • 8 Sec
  • multiple
  • 2 DCY
P2243 O2 Sensor Reference Voltage Circuit / Open - Bank 1, Sensor 1 -- Check the Heated Oxygen Sensor (HO2S) -G39-. Refer to HEATED OXYGEN SENSOR HO2S, CHECKING .
  • O2S signal front > 3.25 V and Internal resistance > 1000 Ω
  • O2S signal front < 0.30 V And Internal resistance > 1000 Ω
  • Heater control, active sec.
 20 Sec
  • multiple
  • 2 DCY
P2257 Air pump relay. short to grnd. PZEV only Check the Secondary Air System. Refer to CATALYTIC CONVERTER, CHECKING  signal voltage <3.00 V
  • pump relay commanded off
  • engine speed >80 RPM
 2 Sec
  • Continuous
  • 2 DCY
P2258 Air pump relay. sort to B+. PZEV only Check the Secondary Air System. Refer to CATALYTIC CONVERTER, CHECKING  signal current 0.60...1.20 A
  • pump relay commanded on
  • engine speed >80 RPM
 2 Sec
  • Continuous
  • 2 DCY
P2270 O2 Circuit Slow Response (Bank 1, Sensor 2 -- Check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. Refer to OXYGEN SENSOR O2S BEHIND THREE WAY CATALYTIC CONVERTER, CHECKING . O2S signal rear not oscillating at reference< 603...649mV
  • mass air flow, >25...150.0 kg/h
  • O2S rear readiness,>10 Sec
  • modeled exhaust gas temp. >350° C
 100 Sec
  • multiple
  • 2 DCY
P2271 O2 Circuit Slow Response (Bank 1, Sensor 2 -- Check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. Refer to OXYGEN SENSOR O2S BEHIND THREE WAY CATALYTIC CONVERTER, CHECKING . O2S signal rear not oscillating at reference> 603...649mV
  • mass air flow, >25...150.0 kg/h
  • O2S rear readiness,>10 Sec
  • modeled exhaust gas temp. >350° C
  • fuel cut-off > 3.0 Sec
 100 Sec
  • multiple
  • 2 DCY
P2279 Intake air system leak -- Check the Intake Air Temperature (IAT) Sensor -G42- Refer to INTAKE AIR TEMPERATURE SENSOR, CHECKING 
  • threshold to detect a defective system >1.45
  • AND
  • ratio of the tie system defective during the measurement window to the whole duration of the measurement window >0.60
  • time after engine start >60.0 Sec
  • engine load < 40.1%
  • mass air flow < 6553.50 kg/h
  • ECT > 50° C
  • lambda control value < 5%
  • lambda set value 0.95...1.05
  • vehicle speed < 1 km/h
  • lambda control active
  • engine speed idle
  • altitude < 2700m
  • number of checks 4
 16 Sec
  • multiple
  • 2 DCY
P2293 Fuel Pressure Regulator 2 Performance -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING .
  • difference between target pressure vs. actual pressure, <1.50mPa
  • difference between target pressure vs. actual pressure, > 1.50 mPa
  • time after engine start, 12.0 Sec
  • fuel cut off, not active
 3.5 Sec
  • multiple
  • 2 DCY
P2294 Fuel Pressure Regulator 2 Control Circuit open circuit -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . Signal voltage 1.40 - 3.20 V
  • Fuel control valve, commanded off
  • Fuel pump, Commanded on
 0.5 Sec
  • continuous
  • 2 DCY
P2294 Fuel Pressure Regulator 2 Control Circuit Rationality check -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . signal pattern incorrect
  • Fuel Control Valve, Commanded off
 1 Sec
  • multiple
  • 2 DCY
P2295 Fuel Pressure Regulator 2 Control Circuit Low short to ground -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . < 1.40...3.20 V
  • Fuel Control Valve, Commanded off
 0.5 Sec
  • continuous
  • 2 DCY
P2296 Fuel Pressure Regulator 2 Control Circuit High -- Check the Fuel Pressure Sensor -G247-. Refer to FUEL PRESSURE SENSOR, CHECKING . Signal voltage >3.20 V
  • Fuel Control Valve, Commanded on
 0.5 Sec
  • continuous
  • 2 DCY
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