Renault P0146 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3

Description

OBD-II Trouble Code Description for P0146 Renault

O2 Sensor Circuit No Activity Detected

What does this mean?

OBD2 Code P0146 Renault definition:
The catalytic converter is used to control emissions. The o2 sensor on Bank 1, position 3 is aft of the converter and monitors the catalyst efficiency. The PCM (Powertrain Control Module) does this by comparing the post-cat o2 sensor to the pre-cat o2 sensors. The o2 sensor is a four wire sensor. The PCM supplies a reference to the sensor of about half a volt and also supplies a sensor ground and 12 volts for the heater element. The fourth wire is a ground for the heater element (the heater in the sensor helps the sensor to warm up faster which allows the engine to reach closed loop sooner). The sensor varies the supplied reference voltage based on oxygen content of the exhaust. Oxygen sensors are capable of varying between 0.1 volts to 0.9 volts. Lean exhaust produces low voltage and causes the supplied 0.45 volts to drop. Rich exhaust produces high voltage and causes the supplied 0.45 voltage to increase. Pre-catalyst o2 sensors switch between low and high voltage rapidly. However a post-cat o2 sensor may switch much slower & not vary as much (this is normal). If the sensor doesn’t respond as it should or there are too few switches in a given time period, P0146 Renault may set.

Symptoms

Possible sumptoms of OBD code P0146 Renault
Symptoms of a P0146 Renault DTC may include: MIL (Malfunction Indicator Lamp) on May idle or drive poorly Fuel economy may decrease

Causes

Possible causes of OBD code P0146 Renault
Potential causes of an P0146 Renault code include: Bad Bank 1, position 3, o2 sensor Wiring problem, melted harness, broken connectors, etc. Bad PCM

Possible Solutions

1. Start the engine and allow it to reach operating temperature. Using a scan tool, observe the Bank 1 position 3 o2 sensor. If it isn’t moving between 0.1 and 0.9 volts, increase the engine RPM to a fast idle and then recheck the sensor voltage reading. If it starts switching now, the sensor may be sluggish and/or intermittently going “dormant”. Replacing the sensor at this point would be a good idea. Visually check the o2 sensor for contaminates, etc. If you suspect it’s contaminated with coolant or oil, replace it. a. But, if it still isn’t responding after increasing engine RPM, turn off the engine and unplug the 1/3 o2 sensor. With KOEO (key on engine off) check that there is battery voltage and ground to the o2 sensor heater element. If the heater element has no battery voltage it can cause the o2 sensor to go “dormant” and not switch properly which can cause a P0146 Renault. So, diagnose that problem first(there will usually be other codes present). b. If there is power and ground to the heater element check that the sensor ground is present. If it is, connect a jumper wire between the sensor ground and signal wire. Now the 1/3 o2 sensor reading should be low. If so, replace the Bank 1 position 3 o2 sensor. c. If, after connecting the jumper wire, the o2 sensor reading still remains “stuck”, check for wiring problems, harness contacting exhaust components, or broken connectors. Repair as necessary. Then recheck. d. If you can find no wiring problems and the o2 sensor reading on the scan tool doesn’t change after installing the jumper wire, recheck at the PCM connector. If it still shows no change, the PCM may be at fault.


The OBD2 Code Information Be Applicable For Renault:

2013 Renault ZOE,2013 Renault Twin-Z Concept,2013 Renault Twin-Run Concept,2013 Renault Talisman,2013 Renault Symbol,2013 Renault Scenic XMOD,2013 Renault Fluence,2013 Renault Espace,2013 Renault Clio,2012 Renault Twingo,2011 Renault Megane,2011 Renault Latitude,2011 Renault Laguna Estate,2011 Renault Laguna,2011 Renault Frendzy Concept,2011 Renault Captur Concept,2010 Renault Scenic,2010 Renault Megane RS,2010 Renault Megane Estate,2010 Renault Grand Scenic,2010 Renault Fluence,2010 Renault DeZir Concept,2010 Renault Clio RS,2009 Renault Twingo RS,2009 Renault Symbol,2009 Renault Scenic,2009 Renault Safrane,2009 Renault Megane,2009 Renault Laguna GT,2009 Renault Laguna Coupe,2009 Renault Koleos,2009 Renault Kangoo,2009 Renault Clio Campus,2009 Renault Clio,2008 Renault ZE Concept,2008 Renault Twingo,2008 Renault Sandero,2008 Renault Laguna Estate,2008 Renault Laguna,2008 Renault Kangoo,2007 Renault Megane,2006 Renault Twingo,2006 Renault Thalia,2006 Renault Nepta Concept,2006 Renault Kangoo,2006 Renault Espace,2006 Renault Clio Sport,2006 Renault Clio RS Concept,2006 Renault Altica Concept,2005 Renault Z17 Concept,2005 Renault Vel Satis,2005 Renault Modus Initiale,2005 Renault Laguna,2005 Renault Clio III,2004 Renault Modus,2004 Renault Megane,2004 Renault Clio,2003 Renault Scenic II,2003 Renault Be Bop

 

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