Description
OBD-II Trouble Code Description for P0111 Renault
IAT Circuit Malfunction
What does this mean?
OBD2 Code P0111 Renault definition:
The IAT (Intake Air Temperature) sensor is a thermistor that varies resistance based upon the temperature of the engine intake air. Usually a two wire sensor. One wire is supplied 5 Volt from the PCM (Powertrain Control Module) and the other is a ground. The PCM monitors the change in the 5 Volt supplied to determine air temperature. When the intake air is cold, the resistance is high, resulting in a high signal voltage. When the intake air is warm, the reistance is low, resulting in a low signal voltage. This code means that the PCM saw a larger-than-normal change in a shorter-than-expected time on the IAT signal circuit.
Symptoms
Possible sumptoms of OBD code P0111 Renault
Since this code is likely pointing to an intermittent problem on the IAT circuit, there may not be any symptoms at present. However, the MIL will likely be on. The car MAY exhibit some drivability problems, but it is more likely that there will be no noticeable symptoms to the driver.
Causes
Possible causes of OBD code P0111 Renault
a bad IAT sensor an open in the signal or ground circuit a short to ground on the signal circuit poor connection at sensor or PCM
Possible Solutions
If there are other IAT codes present, diagnose them first. If not, then, using a scan tool verify the IAT voltage with KOEO (Key on engine off). If, on a cold engine it reads the same as the CTS (Coolant temperature sensor), then the problem is intermittent. But if the IAT reading isn’t the same as the CTS refer to diagnostic procedure for P0110 Renault. If your scan tool has a freeze frame failure records feature, use it to see what the IAT reading was at the time of the failure. If the reading was at negative 30 or so degrees F (indicating it was at the extreme coldest reading), then there was an intermittent high resistance reading on the IAT signal circuit. Check for an open ground on the ground circuit and signal circuit. If they are OK, try raising and lowering the temperature of the IAT sensor artificially. Do this by removing the IAT and putting it in a freezer and then applying heat with a heat gun (be careful not to apply too much heat to the IAT with the heat gun or it’ll melt the sensor). Watch the resistance change using an ohmmeter attached to each terminal. It should vary smoothly with no sudden jumps. If the reading jumps suddenly, then repace the IAT sensor. However if the freeze frame reading was at the highest extreme (above 250 deg. F) then there was an intermittent low resistance on the signal circuit. Check for a short to ground on the signal circuit. If it appears OK, then do the above artificial heat test and replace the IAT as necessary. If the problem can’t be duplicated, use a voltmeter to watch the signal voltage as you “wiggle” test the wiring harness. Watch for a sudden change in voltage indicating a short or open. Replace IAT as necessary. This is a pretty simple code and it only really looks for extremely short changes that are relatively high in voltage. It’s usually the sensor that is bad unless the vehicle is extremely old, in which case there may be harness problems.
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
Note:
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