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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 776 (ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM])OBD-II DRIVE MODEPCM ADAPTIVE MEMORY PRODUCTION, EGR, HO2S HEATER, HO2S, TWC, AND EVAP SYSTEM REPAIR VERIFICATION DRIVE MODE
2004 Oldsmobile Bravada RWD

PCM Adaptive Memory Production, EGR, HO2S heater, HO2S, TWC, and EVAP System Repair Verification Drive Mode

2004 Oldsmobile Bravada RWDSECTION PCM Adaptive Memory Production, EGR, HO2S heater, HO2S, TWC, and EVAP System Repair Verification Drive Mode
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine and warm it up completely.
  2. Clear the DTC from the PCM memory using the WDS or equivalent.
  3. Verify the following conditions and correct if necessary:
    • All accessory loads (A/C, headlights, blower fan, rear window defroster) are off.
    • Initial ignition timing and idle speed are within the specification.
  4. Verify that all of the following PIDs are within the following specifications. All PIDs must be within specifications from Steps 5 to Steps  6 .
    • BARO: more than 72.3 kPa {542 mmHg, 21.3 inHg} 
    • IAT: 5-35 °C {41-95 °F} 
    • FTL: 15-85% 
    • B+: above 10.9 V 
  5. With the vehicle stopped, race the engine at the engine speed indicated, and then drive the vehicle as shown in the graph. The driving conditions before driving at constant speed are not specified. If possible, monitor RPM PID for engine speed during this procedure.
    Fig 1: PCM Adaptive Memory Production, EGR, HO2S heater, HO2S, TWC, & EVAP System Repair Verification Drive Mode Graph (Vehicle Speed Vs Time)
    G00974373Courtesy of MAZDA MOTORS CORP.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.