Error code

OBD2 P2108

OBD2P2108
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle Actuator Control Module Performance.

Severity

moderateCan drive but may experience reduced performance and safety issues.

Summary

P2108 indicates a performance issue with the throttle actuator control module (TAC) in drive-by-wire systems where there's no physical link between the throttle pedal and the throttle plate.

Symptoms

  • Engine may enter fail-safe mode
  • Check engine light illuminates

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and connectors in throttle control circuits
  • Defective throttle control module
  • Defective throttle control system relay
  • Defective throttle actuator motor
  • Defective throttle position sensor
  • Defective throttle pedal position sensor

Diagnosis

  1. Inspect wiring and connectors for damage or corrosion
  2. Check relay operation
  3. Test throttle control module, actuator motor, position sensors

Fixes

  • Replace faulty component (e.g., TAC module, relay, sensor)

FAQ

What causes P2108?

Common issues include electrical faults in the throttle control system or failure of components like the TAC module.

How serious is P2108?

Moderately serious; it can affect engine performance and trigger a fail-safe mode, but usually allows continued driving with reduced functionality.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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