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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
P1515high severityPowertrain

Control Module Throttle Actuator Position Performance

on 2000 Chevrolet Impala 3.8L V6 · FWD

What this code means

The PCM detected a discrepancy between the commanded throttle actuator position and the actual position. The electronic throttle control system is not achieving the position requested by the PCM.

Symptoms

  • Reduced Engine Power message
  • Check Engine Light
  • Limited acceleration
  • Engine may idle only
  • Limp mode

Common causes

  • Carbon buildup in throttle body
  • Faulty throttle body actuator motor
  • Worn or damaged TPS
  • Wiring issue to throttle body
  • PCM calibration issue

Diagnostic steps

  1. Clean throttle body
  2. Test throttle body motor
  3. Check TPS sensor readings
  4. Inspect all throttle body connectors
  5. Check for PCM software update

Repair notes

Clean throttle body. If condition persists, replace throttle body assembly. Check for PCM reprogramming TSBs.

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🔧 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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