LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Porsche
>>
1999
>>
Boxster (986) F6-2.5L
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Computers and Control Systems
>>
Testing and Inspection
>>
Pinpoint Tests
>>
Test Point 19
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Test Point 19
TEST POINT 19
Load detection
DTC 121
Possible fault causes:
-
Incorrect cruise control adjustment
-
Throttle potentiometer defective
-
Engine drawing in secondary air