What does code P21DA mean?

Q: What does code P21DA mean?

Cylinder 12 Injector B Circuit/Open. P21DA indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the fuel injector control circuit for cylinder 12, specifically the 'B' injector where multiple injectors serve that cylinder. The PCM monitors the injector driver circuit and sets this code when the expected current flow is not present during commanded injector operation.

DTC codes / P21xx · Fuel and air metering / P21DA

P21DACylinder 12 Injector B Circuit/Open

P21DA indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the fuel injector control circuit for cylinder 12, specifically the 'B' injector where multiple injectors serve that cylinder. The PCM monitors the injector driver circuit and sets this code when the expected current flow is not present during commanded injector operation.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.