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The reason of P1177 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.
P1685 OBD-II Diagnostic Powertrain (P) Trouble Code Description
P1685 engine trouble code is about Crankshaft Position Sensor B Circuit Malfunction.
Reason For P1685 Code
The reason of P1685 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

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