Diagnosing this Seat is easy using a scan tool. The Scanner and lab scope were used to electronically prove the failure indicated by the trouble code and determine if it was the sensor or the wiring. Another fix successfully completed.
Vehicle
2012 Seat Altea 2.0 Diesel
Title
000387, Replaced Fuel Temperature Sensor
Complaint
The customer states the check engine light is on.
Cause
Connected a scan tool and found code 000387 – Fuel Temperature Sensor A (G81): Open or Short to Plus. Performed a road test, used the scan tool to monitor live data and found the fuel temperature sensor signal parameter was erratic. With the key on, engine off, used a multi-meter to check for the presence of voltage and ground at the fuel temperature sensor, and found both were present. At idle, backprobed the fuel temperature sensor and monitored the sensor signal on a lab scope. The fuel temperature sensor signal observed on the lab scope was erratic. Used the multi-meter to measure the resistance of the fuel temperature sensor and found the measured resistance was out of specifications. The results of these tests verified the fuel temperature sensor was faulty.
Correction
Replaced the fuel temperature sensor, cleared codes, performed a road test and verified the vehicle operated properly.
SureTrack® is a powerful value-added feature available with select Snap-on diagnostics tools. It offers an exclusive combination of expert knowledge and detailed parts replacement records, all wrapped in an interactive community.
Want more? Click here for more information on using SureTrack.
Looking for diagnostic tools? Click here to request more information on Snap-on diagnostic tools.
New or Expired SureTrack users: Click here for authorization key instructions.
