LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Cadillac
>>
1991
>>
DeVille Touring
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Tests W/Codes
>>
Pcm Flow Charts Codes E12 To E99
>>
Pcm Code E38, Open Mat Sensor Circuit
>>
Test Conditions:
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Test Conditions:
PCM codes E14 and E15 not set.
Coolant sensor temperature greater than or equal to 23°F (-5°C).