Mechanics

PO717,PO128

2002 Suzuki XL7

Engine Mechanical problem
2002 Suzuki XL7 6 cyl Four Wheel Drive Automatic 82762 miles

service engine soon light is on, had a diagnostic run on vehicle and these two codes showed up, how much of a problem are they
Avatar
Tom gould
December 13, 2009.




DTC P0128: COOLANT THERMOSTAT MALFUNCTION
Condition
DTC P0128 is set when engine coolant temperature is less than 167 °F (75 °C) after engine has run for a specified time. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.
Possible Causes
Possible causes are: Thermostat malfunction.
ECT sensor malfunction.
ECM malfunction.

P0717 (4) Input/Turbine Speed Sensor Circuit - No Signal

Dave H
Apr 30, 2010.


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