P221A

P221B, P221C, P221D, P221E, P221F ISO/SAE Reserved

DTC P221A, sometimes indicated as P221A00 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 p221b, p221c, p221d, p221e, p221f iso/sae reserved.

This code stands for "ISO/SAE Reserved." It is generated when a scan tool attempts to access a diagnostic code that is not currently defined.
There is no specific solution for this code, as it is simply a notification that the code being referenced is not currently defined. If this code is accompanied by any other codes, those codes should be investigated and resolved first.

  • P221A: P221B, P221C, P221D, P221E, P221F ISO/SAE Reserved
  • P221A: ISO/SAE Reserved

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.

  • KC-107 - ENGINE AND ENGINE COOLING
    VOLVO: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A and P2201: nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly mod
  • KC-107 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
    VOLVO: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A and P2201: nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly mod
  • NTB16048 - EQUIPMENT
    NISSAN: If you confirm the mil is on with one or more of the following dtcs stored as current: P22A7, P229E, P221A. Action 1. Replace the outlet nox sensor. 2. Confirm that ecm requires reprogramming. Refer to step 6 on page 7. If the ecm req
  • KC-107 - ENGINE AND ENGINE COOLING
    VOLVO: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A and P2201: nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly mod
  • KC-107 - ENGINE AND ENGINE COOLING
    MACK: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A and P2201: nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly mod
  • K15560422 - ENGINE AND ENGINE COOLING
    VOLVO: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A, P2201, P103C, P20EE, and P207F : nox sensor diagnostic information to be used before sensor replacement - obd13 and newer
  • K15560422 - ENGINE AND ENGINE COOLING
    MACK: Selective catalytic reduction ( scr ) efficiency and nox sensor diagnostic trouble codes ( dtc ) P225C, P225E, P221A, P2201, P103C, P20EE, and P207F : nox sensor diagnostic information to be used before sensor replacement - obd13 and newer
  • K15560422 - EQUIPMENT
    MACK: Selective catalytic reduction ( scr ) efficiency and nox sensor codes P225C, P225E, P221A, P2201, P103C, P20EE, and P207F : nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly model y
  • K15560422 - EQUIPMENT
    VOLVO: Selective catalytic reduction ( scr ) efficiency and nox sensor codes P225C, P225E, P221A, P2201, P103C, P20EE, and P207F : nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly model y
  • K15560422 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
    MACK: Selective catalytic reduction ( scr ) efficiency and nox sensor codes P225C, P225E, P221A, P2201, P103C, P20EE, and P207F : nox sensor diagnostic information to be used before sensor replacement - obd13 and newer emissions (commonly model y
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