Description
OBD-II Trouble Code Description for P0118 Citroen
Engine Coolant Temperature Circuit High
What does this mean?
OBD2 Code P0118 Citroen definition:
The engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set.
Symptoms
Possible sumptoms of OBD code P0118 Citroen
Symptoms of a P0118 Citroen could include: Very poor fuel economy A no start condition Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring Illumination of MIL
Causes
Possible causes of OBD code P0118 Citroen
A code P0118 Citroen may mean that one or more of the following has happened: A bad connection at the sensor An open in the ground circuit between the ECT sensor and the PCM A short in the voltage feed between the sensor and the PCM A bad PCM (less likely) A bad temperature sensor (shorted internally)
Possible Solutions
First, if you have access to a scan tool, check the reading of the coolant sensor. Does it read a logical number? If so, the problem is likely intermittent. Perform a “wiggle” test by wiggling the connector and harness to the sensor while watching the reading on the scan tool. Watch for any drop-outs. Drop-outs would indicate a bad connection. If the scan tool reads an illogical temperature, check the resistance of the temperature sensor. If it is out of specs, replace it. If it is in specifications, unplug the sensor and, using a fused jumper wire, jumper the two terminals of the connector together. The temperature reading should now be maxed out to above 250 degrees F. If not, there is likely a problem with the ground circuit or voltage supply. Check for 5 volts reference voltage at the connector. Also check for ground presence at the connector. If you do not have 5V ref. and/or ground continuity, check for these back at the PCM connector. If you have these at the PCM connector, then repair open or short between the PCM and the sensor. If you do not, remove the offending wire from the PCM and then check for proper voltage at the PCM pin. If it’s present now, repair short on the circuit. If it isn’t present after removing the wire and checking the pin, replace PCM NOTE: Usually, P0118 Citroen is indicative of a bad temperature sensor, but doesn’t rule out these other possibilities. If you’re unsure of how to diagnose a PCM, do not attempt.
The OBD2 Code Information Be Applicable For Citroen :
2013 Citroen Technospace Concept,2013 Citroen DS Wild Rubis Concept,2013 Citroen DS3 Cabrio Racing Concept,2013 Citroen Cactus Concept,2013 Citroen C4 L,2013 Citroen C4 Aircross,2013 Citroen C3 Picasso,2013 Citroen C1,2013 Citroen C-Elysee,2012 Citroen Numero 9 Concept,2012 Citroen DS5,2012 Citroen DS4 Racing Concept,2012 Citroen DS4,2011 Citroen Tubik Concept,2011 Citroen DS3 Racing,2011 Citroen DS3 R3,2011 Citroen DS3,2011 Citroen C5,2011 Citroen C4,2011 Citroen C-Zero,2010 Citroen Survolt Concept,2010 Citroen Metropolis Concept,2010 Citroen Lacoste Concept,2010 Citroen GQ Concept,2010 Citroen DS High Rider Concept,2010 Citroen C3,2009 Citroen REVOLTe Concept,2009 Citroen DS Inside Concept,2009 Citroen C4 Coupe,2009 Citroen C4,2009 Citroen C3 Pluriel Charleston,2009 Citroen C3 Picasso,2009 Citroen C2,2009 Citroen C1,2009 Citroen Berlingo Multispace,2008 Citroen Hypnos Concept,2008 Citroen GT Concept,2008 Citroen C5 Estate,2008 Citroen C5,2008 Citroen C4 notchback,2008 Citroen C4 WRC HYmotion4 Concept,2008 Citroen C4 Sedan,2007 Citroen Grand C4 Picasso,2007 Citroen Cruise Crosser Concept,2007 Citroen C5 Airscape Concept,2007 Citroen C4 Picasso,2007 Citroen C-Crosser,2007 Citroen C-Cactus Concept,2006 Citroen C6,2006 Citroen C3 X-TR,2006 Citroen C3 VTR,2006 Citroen C3 Pluriel,2006 Citroen C3,2006 Citroen C1 5door,2006 Citroen C1 3door,2006 Citroen C-Metisse Concept,2006 Citroen C-Buggy Concept,2005 Citroen C5 Break,2005 Citroen C5,2005 Citroen C4 Coupe with Panoramic Sunroof,2005 Citroen C4 Coupe Enterprise,2005 Citroen C4 Coupe,2005 Citroen C4,2005 Citroen C-SportLounge Concept Car,2005 Citroen C-Airplay Concept,2004 Citroen Xsara Picasso,2004 Citroen C4 Sport Concept,2004 Citroen C3 Pluriel HDi 70,2004 Citroen C2,2003 Citroen CAirlounge Concept,2003 Citroen C8 Exclusive,2002 Citroen C-Airdream Concept,2001 Citroen Xsara Picasso,2001 Citroen C-Crosser Concept
Note:
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