HOLDEN GEN III V8, Service Training

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GEN III V8 ENGINE MANAGEMENT
DTC P0155 Heated Oxygen Sensor Heater Circuit Bank 2 Sensor 1
Conditions for running DTC P0155
• DTCs P0101,P0102, P0103, P 0 1 1 2 , P0113, P0117, P0118, P0121, P0122, P0123, P0335, P0336, P0351-
P0158, P1258 are not set.
• The intake air temperature and the engine coolant temperature are less than 50°C and are within 8°C of
each other at engine start-up.
• The ignition voltage is between 10.0 volts and 18.0 volts.
• The engine air flow is less than 18g/s.
Conditions for setting DTC P0155
• The H02S voltage remains between 300 mV and 700 mV for a predetermined amount of time (depends on
engine coolant temperature and air flow).
Action taken when DTC P0155 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information
in the Freeze Frame/Failure Records.
Conditions for clearing the Check Powertrain Lamp and DTC P0155
• The PCM turns the Check Powertrain Lamp OFF after one ignition cycle that the diagnostic runs and does
not fail,
• A last test failed (current DTC) clears when the diagnostic runs and does not fail.
DTC P0171 Fuel System Lean Bank 1
Conditions for running DTC P0171
• DTCs P0101, P01Q2, P0103, P0107, P0108, P 0 1 1 2 , P0113, P0117, P 0 1 1 8 , P0121, P0122, P0123, P0335,
P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358, P 1 1 1 1 , P 1 1 1 2 , P 1 2 5 8 , a r e not set.
• The engine coolant temperature is between 50°C and 1 1 5 ° C .
• The barometric pressure is greater than 74 kPa.
• The mass air flow is between 5.0 g/s and 90 g/s.
• The manifold absolute pressure is between 26 kPa and 90 kPa.
• The intake air temperature is between -20°C and 90°C.
• The engine speed is between 400 RPM and 3000 RPM.
• The TP sensor angle is less than 90%.
• The vehicle speed is less than 137 km/h.
Conditions for setting DTC P0171
• The average Long Term Fuel Trim cell values are above a predetermined threshold.
• All the above conditions are present for at least six seconds.
Action taken when DTC P0171 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information
in the Freeze Frame/Failure Records.
Conditions for clearing the Check Powertrain Lamp and DTC P0171
• The PCM turns the Check Powertrain Lamp OFF after one drive trip that the diagnostic runs and does not
fail within the same conditions that the DTC last failed.
NOTE: If the last failure was during a non-typical driving condition, the Check Powertrain Lamp may remain
ON longer than the one drive trip. Review the Freeze Frame/Failure Records for the last failure conditions.
• A last test failed (Current DTC) clears when the diagnostic runs and does not fail.
Page • 56 GEN III V8 ENGINE MANAGEMENT