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6E–376 6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS Test Description Number(s) below refer to the step number(s) on the HO2S voltage should vary from between 5. Wrap a shop towel around the fuel pressure connector to absorb any small amount of fuel 7. Add Caution, Use correct pliers so damage to fuel lines will not occur. DTC P1171 – Fuel System Lean During Acceleration
Step Action Value(s) Yes No 1 Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 Are any component-related DTCs set? — Go to component DTC charts Go to Step 3 3 1. Check the vehicle’s fuel tank for an adequate amount of fuel. 2. Add fuel to the vehicle’s fuel tank if the tank is almost empty. Was fuel added to the vehicle’s fuel tank? — Go to Step 4 Go to Step 5 4 1. Place the transmission in park. running warm engine 75 ° C-95 ° C (167 ° F-203 ° F) at 1200 RPM. 3. HO2S 1 voltage should vary within the specified range. 4. Quickly open the throttle too halfway for a few seconds. Did the voltage suddenly rise toward the high end of the 100-900 mV Go to Fuel System Electrical Test Go to Step 5 5 1. Disconnect the fuel pump relay and crank the engine to relieve the fuel pressure. 2. Install the fuel pressure gauge. temperature. 4. Disconnect the vacuum line going to the fuel pressure regulator. With the engine running, is the fuel pressure within the 280-325 kPa (41-46 psi) Go to OBD System Check Go to Step 6 6 Check for restricted fuel lines or restricted in-line filter. Was a problem found? — Verify repair Go to Step 7 |