P21A9
P21A9
DTC P21A9, sometimes indicated as P21A900 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing p21a9.
DTC Trouble Code Search
Bulletins
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.