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− − − − SJC8A00K77100090171FAAT30 − − DTC P0171: DTC P0172: DTC P0174: DTC P0175: YES NO 11-96 PGM-FI System DTC Troubleshooting (cont’d) Rear Bank (Bank 1) Fuel System Too Lean Rear Bank (Bank 1) Fuel System Too Rich Front Bank (Bank 2) Fuel System Too Lean Front Bank (Bank 2) Fuel System Too Rich NOTE: • Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general • If some of the DTCs listed below are stored at the same time as DTC P0171, P0172, P0174, and/or P0107, P0108, P1128, P1129: Manifold absolute 1. Check the fuel pressure (see page 11-288). If you are troubleshooting DTC P0171 or P0174, go to step 2. If you are troubleshooting DTC Check these items: • If the pressure is too high, replace the fuel pressure regulator (see page 11-299), then go to • If the pressure is too low, check the fuel pump, the fuel pressure regulator, the fuel filter, and the 2. Turn the ignition switch ON (II). 3. Reset the PCM with the HDS. 4. Do the PCM idle learn procedure (see page 11-273). 5. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the 6. Test-drive under these conditions: • Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C) • Transmission in D position 55 mph (40 88 km/h) for 5 minutes, then drive at a steady speed between 15 75 mph (24 120 km/h) for 15 minutes. NOTE: DTC P0171, P0172, P0174, and/or P0175 may Is the f uel pr essur e OK ? |