SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 117 (ENGINE CONTROLS - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P1640: CONTROL MODULE OUTPUT CIRCUITDTC PARAMETERS
2004 Oldsmobile Bravada RWD

DTC Parameters

2004 Oldsmobile Bravada RWDSECTION DTC Parameters
WARNING: This page is about a different car, the 2002 Saturn LW200, 2002 Saturn L200, and 2002 Saturn L100. However, it is still accessible from the selected car via links, so may be relevant.
  • Condition exists for longer than 6 seconds.
  • Engine is running.

DTC P1640 will set if A/C relay, 1-2 shift solenoid, 2-3 shift solenoid or TCC solenoid feedback voltage is less than 4.0 volts when that device is commanded OFF; or if A/C relay, 1-2 shift solenoid, 2-3 shift solenoid or TCC solenoid feedback voltage is greater than 3.5 volts when that device is commanded ON.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.