LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Porsche >> 2003 >> Boxster Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DME 7.8 Diagnosis >> DTC P0638: Throttle Jacking Unit, Position Error-Signal Implausible >> Throttle Jacking Unit, Position Error-Signal Implausible
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Jacking Unit, Position Error-Signal Implausible

Diagnosis conditions 

Possible fault cause 

Affected terminals 

Terminal I/9 and I/7

NOTE:
  • The vehicle is in emergency function mode, i.e. the engine is turning at approx. 1200 rpm.