LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Lexus
>>
1998
>>
SC 400
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Tests W/Codes
>>
Diagnostic Tests
>>
DTC P0121: Throttle Position (TP) Sensor Circuit Range/Performance Problem
>>
Diagnosis & Repair
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Diagnosis & Repair
Replace TP sensor and retest.