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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 119 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 2.2L)DIAGNOSTIC TESTSDTC P1640: CONTROL MODULE OUTPUT CIRCUITDIAGNOSTIC AIDS
2004 Oldsmobile Bravada AWD

Diagnostic Aids

2004 Oldsmobile Bravada AWDSECTION Diagnostic Aids
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

If DTC P0446 or P1441 is also set, diagnose those DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .

If engine will not start and DTC P1640 is set, a fault may lie in the main relay control circuit.

If A/C is inoperative, see appropriate MANUAL A/C-HEATER SYSTEMS article.

RENDER: 1.0x

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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.