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
P1121
Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
Ford
Fuel and Air Metering
High severity
P1123
Throttle Position Sensor Circuit Intermittent High Voltage
Ford
Fuel and Air Metering
High severity
P1127
Exhaust Not Warm Enough Downstream O2 Sensor Not Tested
Ford
Auxiliary Emissions Control
High severity
P1130
Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 1
Ford
Fuel and Air Metering
Medium severity
P1132
Lack of Upstream Heated Oxygen Sensor Switch Bank 1
Ford
Fuel and Air Metering
Medium severity
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