Description
OBD-II Trouble Code Description for P0118 Fiat
Engine Coolant Temperature Circuit High
What does this mean?
OBD2 Code P0118 Fiat 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 Fiat
Symptoms of a P0118 Fiat 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 Fiat
A code P0118 Fiat 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 Fiat 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 Fiat:
2013 Fiat Viaggio,2013 Fiat Strada,2013 Fiat Panda UK Version,2013 Fiat Panda Trekking,2013 Fiat Panda 4×4,2013 Fiat Panda,2013 Fiat 500S,2013 Fiat 500L,2013 Fiat 500C Abarth,2012 Fiat Punto,2012 Fiat Palio,2012 Fiat Freemont AWD,2012 Fiat Freemont,2012 Fiat 695 Abarth Maserati Edition,2012 Fiat 500 Abarth,2011 Fiat Uno,2011 Fiat Punto Evo Abarth esseesse,2011 Fiat Punto Evo Abarth,2011 Fiat Idea,2011 Fiat Bravo,2011 Fiat 500 Sport,2011 Fiat 500 Coupe Zagato Concept,2011 Fiat 500C Abarth esseesse,2011 Fiat 500C Abarth,2010 Fiat Uno Cabrio Concept,2010 Fiat Sedici,2010 Fiat Punto Evo,2010 Fiat Doblo Cargo,2010 Fiat Doblo,2010 Fiat 500 Abarth R3T,2010 Fiat 500C,2009 Fiat Grande Punto Natural Power,2009 Fiat Fiorino Qubo,2009 Fiat 695 Abarth Tributo Ferrari,2009 Fiat 500 Barbie Concept,2009 Fiat 500 Abarth esseesse,2009 Fiat 500 Abarth Assetto Corse,2009 Fiat 500 Abarth,2008 Fiat Portofino Concept,2008 Fiat Panda Cross,2008 Fiat Grande Punto Abarth,2008 Fiat Grande Punto,2008 Fiat Fiorino,2008 Fiat Croma,2008 Fiat Bravo 1.6 Multijet 16v,2008 Fiat 500,2007 Fiat Panda 100HP,2007 Fiat Linea,2007 Fiat Grande Punto Abarth S2000,2007 Fiat Grande Punto Abarth Preview,2007 Fiat Bravo,2006 Fiat Ulysse,2006 Fiat Sedici,2006 Fiat Panda Multi Eco Concept,2006 Fiat Panda Cross,2005 Fiat Panda Alessi,2005 Fiat Panda 4×4 1.3 Multijet,2005 Fiat Oltre Concept,2005 Fiat Idea,2005 Fiat Grande Punto,2005 Fiat Doblo Cargo,2005 Fiat Doblo,2005 Fiat Croma,2005 Fiat 600 50th,2004 Fiat Trepiuno Concept,2004 Fiat Strada Malibu,2004 Fiat Stilo M.Y. 1.9 Multijet 5door,2004 Fiat Seicento,2004 Fiat Punto Rally,2004 Fiat Panda 4×4,2004 Fiat Multipla,2004 Fiat Idea 5terre Concept,2003 Fiat Strada,2003 Fiat Punto Sporting,2003 Fiat Punto Rally,2003 Fiat Punto Natural Power,2003 Fiat Punto Dynamic,2003 Fiat Punto Active,2003 Fiat Panda Emotion,2003 Fiat Panda Dynamic,2003 Fiat Panda Actual,2003 Fiat Panda,2003 Fiat Marrakech Concept,2003 Fiat Idea 1.9 Multijet Dynamic,2003 Fiat Idea 1.4 16v Emotion,2003 Fiat Idea,2003 Fiat Barchetta First Class of Alviero Martini,2003 Fiat Barchetta,2002 Fiat Ulysse Emotion 2.0 16v,2002 Fiat Ulysse 2.0 JTD,2002 Fiat Ulysse,2002 Fiat Stilo Multi Wagon Dynamic,2002 Fiat Stilo Multi Wagon Actual,2002 Fiat Stilo Multi Wagon,2002 Fiat Stilo Dynamic,2002 Fiat Stilo Active,2002 Fiat Stilo Abarth,2002 Fiat Stilo,2002 Fiat Simba Concept,2002 Fiat Palio Weekend,2002 Fiat Palio,2002 Fiat Multipla,2002 Fiat Albea,2001 Fiat Doblo
Note:
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