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2000 CHEVROLET IMPALA
3.8L V6•FWD•AUTOMATIC•gas
10 active safety recalls on this vehicle — view recalls
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Repairs0Labor548Torque4464Fluid6DTC721Battery1Maintenance0Recalls10
P1514high severityPowertrain

Throttle Body Performance

on 2000 Chevrolet Impala 3.8L V6 · FWD

What this code means

The PCM detected that the electronic throttle body is not meeting performance expectations. The actual throttle position does not match the commanded position within acceptable limits.

Symptoms

  • Reduced Engine Power message
  • Check Engine Light
  • Poor throttle response
  • Stalling
  • Limited acceleration

Common causes

  • Carbon buildup in throttle body
  • Faulty throttle body motor
  • Throttle body wiring issue
  • Failed TPS within throttle body
  • PCM software issue

Diagnostic steps

  1. Inspect throttle body for carbon deposits
  2. Monitor commanded vs actual throttle position
  3. Test throttle body motor operation
  4. Inspect wiring and connectors
  5. Check for updated PCM calibration

Repair notes

Clean throttle body first. If carbon is not the issue, replace throttle body assembly.

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Other Powertrain codes on this vehicle

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