How are Fuel Temperature Sensor issues diagnosed?
When diagnosing the check engine light, the technician will need to connect a diagnostic scanner to the vehicle, read the trouble codes, and use that information coupled with classroom training and experience to identify the cause of failure. In some situations, the fuel temperature sensor will not be suspected except for the understanding that ambient temperature and fuel temperature readings are too far removed from one another. Once the fuel temperature sensor is suspected, the fuel temperature sensor readings and actual fuel temperature will be compared to note any significant differences.
How are Fuel Temperature Sensors replaced?
Since the location of the fuel temperature sensor will be different for each make and model that uses this type of engine control sensor, the replacement procedure will vary, sometimes greatly. This may involve removing the sensor from the fuel tank, fuel rail, or fuel lines, so removal and installation may be a very quick and easy task, or it may be daunting.
RepairPal Recommendations for Fuel Temperature Sensor issues
If the intake manifold needs to be removed in order to access the fuel temperature sensor, the intake manifold gasket(s) should be replaced before the part is reinstalled. Proper procedure for removing, cleaning, reinstalling, and tightening is mandatory for the intake manifold to prevent immediate failure.
What to look out for when dealing with Fuel Temperature Sensor issues
Do not be fooled into replacing the oxygen sensors or catalytic converter. The trouble codes from failure of the fuel temperature sensor will certainly read that the oxygen sensors have noticed a fault in the air to fuel ratio, but that does not mean they have failed.
Can I replace the Fuel Temperature Sensor myself?
Diagnosing the fuel temperature sensor can be very difficult. It is best done by a professional with the appropriate diagnostic scan tools, and the cost of these tools is likely to outweigh the benefit of purchasing them for this repair. If the sensor can be diagnosed, replacing the sensor can be done by the experienced DIY mechanic, but if you are unfamiliar with safety practices associated with servicing the fuel system, leave this job to a professional.
