OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
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Fault codes
P0990
Transmission Fluid Pressure Sensor/Switch E Circuit High
Generic
Transmission System
High severity
P0991
Transmission Fluid Pressure Sensor/Switch E Circuit Intermittent
Generic
Transmission System
High severity
P0994
Transmission Fluid Pressure Sensor/Switch F Circuit Low
Generic
Transmission System
High severity
U1004
SCP (J1850) Invalid or Missing Data for EEC Programming
Communication Network System
High severity
U1010
SCP (J1850) Invalid or Missing Data for Engine Air Intake
Communication Network System
High severity
U1021
SCP (J1850) Invalid or Missing Data for Air Conditioning Clutch
Communication Network System
High severity
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