U3989 Ferrari 308 OBD Code

OBD/2 U3989 error code description and symptoms.

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

U3989 Ferrari 308 Error Code Repair Process :

For air temperature internal sensor circuit short to ground check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. U3989 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks air temperature internal sensor circuit short to ground with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Ferrari 308 U3989 OBD2 Code

A common cause of code U3989 is the failure of Air Temperature Internal Sensor Circuit Short To Ground, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Faulty starter motor
Improper ignition timing
Ignition coils harness is open or shorted

U3989 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U3989 Ferrari 308 OBD Code

U3989 Ferrari 308 Error Code Repair Process :

Common Causes of Ferrari 308 U3989 OBD2 Code

U3989 code for other Ferrari cars