P1517
System
Powertrain (Throttle)
Scanner required
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Throttle Actuator Control Module Internal Fault (GM)

Understand P1517, common causes, and the right SEAFLO pump to diagnose it.

Internal fault in GM throttle actuator control module — often requires throttle body replacement.

Common symptoms

  • Reduced engine power
  • Limp mode
  • Pedal delay

Typical causes

  • Failed throttle body internal driver
  • Corrosion in throttle motor
  • ECM TAC driver fault

What scanner do you need?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Frequently asked questions

Can I diagnose P1517 with a basic code reader?
P1517 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P1517?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.