P2183 Engine Coolant Temperature Sensor 2 Circuit Range/Performance
OBD-II Trouble Code Technical Description
Engine Coolant Temperature (ECT) Sensor #2 Circuit Range/Performance
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to all 1996-newer vehicles (Ford, Hyundai, Kia, Mazda, Mercedes-Benz, etc.). Although generic, the specific repair steps may vary depending on make/model.
The ECT (Engine coolant temperature) sensor is a thermistor which changes resistance based on temperature of the coolant in contact with it. The #2 ECT sensor will be located in the block or coolant passage. Usually it is a two wire sensor. One wire is a 5 Volt supply from the PCM (Powertrain Control Module) to the ECT. The other is a ground to the ECT.
As the temperature of the coolant changes the resistance on the signal wire changes accordingly. The PCM monitors the reading and determines coolant temperature in order to perform essential engine fuel management. When engine coolant is low, sensor resistance is high. The PCM will see a high signal voltage (low temperature). When coolant is warm, the sensor’s resistance is low and the PCM will see a high temperature. The PCM expects to see slow resistance changes on the ECT signal circuit. If it sees a quick change in voltage that isn’t consistent with an engine warming up, this P2183 code will set. Or if it sees a lack of change in ECT signal, this code may set.
Note: This DTC is basically identical to P0116, however the difference with this code is that this refers to the #2 ECT circuit. So vehicles exhibiting this code means they have two ECT sensors. Be sure you are diagnosing the correct sensor circuit.
Symptoms
There may be no noticeable symptoms if the problem is very intermittent, however the following may occur:
Causes
Potential causes of the P2183 code include:
An example of an Engine Coolant Temperature ECT sensor
Possible Solutions
If there are any other ECT sensor codes, diagnose them first.
Using a scan tool, check the ECT #1 & #2 readings. On a cold engine, it should match the IAT reading or should be equal to ambient (outside) temperature reading. If it does match the IAT or ambient temp, check the freeze frame data on your scan tool (if equipped). The saved data should tell you what the ECT reading was when the fault occurred.
a) If the saved info indicates that the engine coolant reading was at the coldest extreme (around -30 deg. F) then that’s a good indication the ECT resistance was intermittently high (unless you live in Anchorage!) Check for an open in the ECT sensor ground and signal circuits and repair as necessary. If they appear okay, warm the engine up while monitoring the ECT for any intermittent jumps high or low. If there are replace the ECT.
b) If the saved info indicates that the engine coolant reading was at the warmest extreme (around 250+ deg.F) then that’s a good indication the ECT resistance was intermittently low. Check for a short to ground on the signal circuit and repair as necessary. If it appears okay, warm the engine up while monitoring the ECT for any intermittent jumps high or low. If there are replace the ECT.
Related ECT sensor circuit codes: P0115, P0116, P0117, P0118, P0119, P0125, P0128, P2182, P2184, P2185, P2186
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"Delete Error Code Permanently, Disable DTC Error Code Function for p2183 in the ECU"
In extreme cases, we even have the option to permanently remove the specific DTC p2183 and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.
Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p2183.
