Description
OBD-II Trouble Code Description for P0162 Alfa Romeo
O2 Sensor Circuit
What does this mean?
OBD2 Code P0162 Alfa Romeo definition:
The O2 (oxygen) sensors measure oxygen content in the exhaust, whether rich or lean. The PCM (powertrain control module) then uses this information to regulate fuel injector pulse in order to keep the proper air:fuel ratio. The O2 sensors are very important for the proper operation of the engine. Fouled or faulty O2 sensors can cause the PCM to add or take away fuel based on the faulty O2 sensor data which can cause a false lean or rich condition. A P0162 Alfa Romeo code definition:the Bank 2,3 O2 sensor, or the third sensor downstream (post-cat) on Bank 2. It is a four wire sensor. The PCM supplies a ground circuit and a reference voltage circuit of about 0.5 volts or half a volt. Also for the O2 sensor heater element there is a battery voltage supply wire (usually from the power distribution center) and another ground circuit for that. The O2 sensor heater allows the O2 sensor to warm up faster, thus achieving closed loop in less time than it would normally take for the exhaust to warm the sensor up to operating temperature. This creates less exhaust emissions at cold startup. The O2 sensor varies the supplied reference voltage based on oxygen content in the exhaust. It is capable of varying from about 0.1 to 0.9 volts, 0.1 V indicating lean exhaust and 0.9 V indicating rich exhaust. This P0162 Alfa Romeo code indicates that the Bank 2, 3 O2 sensor is stuck low for too long or is inactive.
Symptoms
Possible sumptoms of OBD code P0162 Alfa Romeo
Often post-cat O2 sensor problems present few drivability issues since they are inputs to the PCM to monitor catalytic converter quality and don’t directly control fuel. Sometimes no symptoms are noticeable. However the following may be possible on some vehicles: MIL (Malfunction Indicator Lamp) illumination Decrease in MPG Increase in tailpipe emissions
Causes
Possible causes of OBD code P0162 Alfa Romeo
Potential causes of a P0162 Alfa Romeo code include: Bad O2 sensor Signal shorted to voltage Wiring problems due to contact with exhaust components Holes in exhaust near O2 sensor
Possible Solutions
Warm the engine up to normal operating temperature. Using your scan tool’s live datastream, check the signal voltage for the Bank 2,3 O2 sensor at idle. Is it stuck low and not switching? If so, increase engine RPMs for a minute or so and observe if the sensor begins switching or changing voltage. If it does after a period of elevated idle, check under the vehicle for rusty exhaust components or holes in the exhaust near the O2 sensor(s). Repair as necessary. If the exhaust is intact, then suspect a sluggish Bank 2,3 O2 sensor and replace it. If you observe that the O2 sensor remains low on the datastream, then unplug it and observe the reading. It should now be showing reference voltage, or half a volt (0.5 v). If it does, check for connector problems, water intrusion, damage to the sensor, etc. If all is okay, replace the faulty Bank 2,3 O2 sensor. If the voltage reading is still low after unplugging the O2 sensor, then suspect a problem with the wiring. Visually inspect the wiring harness making sure that there is no contact with hot exhaust components and that all the harness retainers are in place. Repair as necessary If no wiring harness issues exist, use a voltmeter to check for reference voltage from the PCM at the unplugged connector. It should be reading reference voltage, or about half a volt (0.5v). If voltage reading is too high, repair the short to voltage on the signal circuit.
The OBD2 Code Information Be Applicable For Alfa Romeo:
2014 Alfa Romeo MiTo new,,2014 Alfa Romeo Giulietta new,,2014 Alfa Romeo 4C,,2013 Alfa Romeo Gloria Concept,,2013 Alfa Romeo Disco Volante Touring,,2012 Alfa Romeo Disco Volante Touring Concept,,2011 Alfa Romeo TZ3 Stradale,,2011 Alfa Romeo Giulietta,,2011 Alfa Romeo 4C Concept,,2010 Alfa Romeo TZ3 Corsa,,2010 Alfa Romeo Pandion Concept,,2010 Alfa Romeo MiTo Quadrifoglio Verde,,2010 Alfa Romeo MiTo 1.4 MultiAir,,2010 Alfa Romeo 2uettottanta Concept,,2010 Alfa Romeo 159 1750 TBi,,2009 Alfa Romeo MiTo UK Version,,2009 Alfa Romeo MiTo GTA Concept,,2009 Alfa Romeo Mi.To,,2009 Alfa Romeo Brera S,,2009 Alfa Romeo 8C Spider,,2009 Alfa Romeo 159 Sportwagon,,2009 Alfa Romeo 159,,2007 Alfa Romeo GT Q2,,2007 Alfa Romeo 8c Competizione,,2007 Alfa Romeo 147 Q2,,2007 Alfa Romeo 147 Murphy and Nye,,2007 Alfa Romeo 147 CnC,,2006 Alfa Romeo Spider UK Version,,2006 Alfa Romeo Spider,,2006 Alfa Romeo 159 Sportwagon,,2005 Alfa Romeo Brera UK Version,,2005 Alfa Romeo Brera,,2005 Alfa Romeo 159,,2004 Alfa Romeo Visconti Concept ItalDesign,,2004 Alfa Romeo 8C Competizione,,2004 Alfa Romeo 166,,2004 Alfa Romeo 156 GTA Autodelta,,2004 Alfa Romeo 156 Crosswagon Q4,,2004 Alfa Romeo 156 Crosswagon,,2004 Alfa Romeo 147 5door,,2004 Alfa Romeo 147 3door,,2003 Alfa Romeo Spider,,2003 Alfa Romeo Kamal Concept,,2003 Alfa Romeo GTV,,2003 Alfa Romeo GT,,2003 Alfa Romeo 156 Sportwagon 2.0 JTD,,2003 Alfa Romeo 156 GTA Autodelta,,2003 Alfa Romeo 156 2.4 JTD,,2003 Alfa Romeo 147 TI,,2002 Alfa Romeo 147 JTD 16V,,2002 Alfa Romeo 147 GTA
Note:
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