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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OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.
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Fault codes
P2123
High voltage detected in accelerator pedal position sensor
Honda
Fuel and Air Metering
High severity
P2228
Low voltage detected in barometric pressure (BARO) sensor
Honda
Fuel and Air Metering
High severity
P2237
High voltage detected in air fuel ratio (AFR) sensor
Honda
Fuel and Air Metering
High severity
P2254
High voltage detected in air fuel ratio (AFR) sensor
Honda
Fuel and Air Metering
High severity
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