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2002 VOLVO S80
2.9L I6•AWD•AUTOMATIC•gas•B6294S
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor1005Torque6617Fluid14DTC1718Battery2Maintenance0Recalls5
P2104critical severityPowertrain

Throttle Actuator Control System Forced Idle

on 2002 Volvo S80 2.9L I6 · AWD

What this code means

ECM has forced the engine to idle speed only due to a detected throttle control fault.

Symptoms

  • Engine stuck at idle
  • Check engine light
  • Vehicle barely moves
  • Traction control light on

Common causes

  • Throttle body failure
  • APP sensor fault
  • Wiring issue
  • ECM detected conflicting throttle signals

Diagnostic steps

  1. Scan for other DTCs
  2. Check APP sensor signals
  3. Inspect throttle body
  4. Clear codes and test

Repair notes

Diagnose root cause from accompanying DTCs. This is a protective measure.

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Other Powertrain codes on this vehicle

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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