SOURCE: P1404 error code
The PCM monitors the exhaust gas recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. When the ignition switch is turned ON, the PCM learns the EGR learned minimum position. The PCM compares the EGR learned minimum position to the EGR position sensor when the EGR valve is commanded closed. If the EGR position sensor indicates that the EGR valve is still open when the PCM is commanding the EGR valve closed, this DTC will set.
Excess deposits on the EGR valve pintle or seat--Remove the EGR valve and check for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
Usually this will fix it but in some cases you may have to replace the egr valve.
SOURCE: '98 Buick Park Avenue Signal Switch Replacement
I have same problem with my 1998. How do I find instructions for replacement of same.
SOURCE: Cannot change 3 rear spark plugs on 1999 Buick park avenue
there is a special tool for this job but I have cheated on this but you ned to be careful when doing this.The wishbone shaped mount on the front going from motor to front of vehicle, remove and it allows the motor to tilt.
SOURCE: 2000 Buick Park Avenue Service engine soon light
need to take car somewhere to have the code read with a scanner,try parts stores first some will do it for free if not the dealers have them
SOURCE: What does trouble code P0171 for a 2002 Buick Park
Trouble Code: P0171 (3.8L V6 VIN 1 Auto)
Fuel Trim System Lean (Bank 1)
Print this code data
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
DTC P0101-P0103, P0107, P0108, P0121-P0123, P0130-P0138, P0140, P0141, P0201-P0206, P0300, P0401-P0405, P0410, P0440-P0446, P0506, P0507, P1404 or P1441 not set, engine started, vehicle driven at less than 82 mph at 550-4000 rpm, BARO sensor over 70 kPa (10.1 psi), ECT sensor from 68-230ºF, IAT sensor from 64-158ºF, MAF sensor from 2.8-150 gm/s, MAP sensor from 16-105 kPa (2.6-15.2 psi), fuel level over 10%, and the PCM detected the Long Term fuel trim value was more than +20% for 6 seconds. The PCM controls the air/fuel metering system to good overall fuel economy, driveability, and emission control. During open loop, the PCM determines fuel delivery based on sensor signals, without the oxygen sensor input. During closed loop, the PCM adds oxygen sensor inputs to calculate Short and Long term fuel trim fuel delivery adjustments. Short Term fuel trim values change rapidly in response to changes in the oxygen sensor signals. Long Term fuel trim makes coarse adjustments in order to maintain an air/fuel ratio of 14.7:1.
Possible Causes:
Troubleshooting:2002 Buick Park Avenue, 3.8L, P0171
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