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Home >> Chrysler >> 2004 >> Crossfire Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Electrical Diagnostics >> Diagnosis And Testing >> DTC P0172: Fuel System 1/1 Lean Control Below Limit (At Load) >> Diagnostic Test >> 2. Checking Fuel Pressure

2. Checking Fuel Pressure

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF). BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

Turn the ignition off.

Install a fuel pressure gauge.

Turn the ignition on.

With the DRB III(R), actuate the Fuel Pump Relay and observe the fuel pressure gauge.

NOTE: Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).

Turn the ignition off.

CAUTION: Stop All Actuations.

Choose a conclusion that best matches your fuel pressure reading. 

Within Specification 

Go To 3

Below Specification 

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