DTC Detection Logic

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTC P219A is displayed with other DTC, first perform the trouble diagnosis for the other DTC. Refer to DTC Index .

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P219A

AIR FUEL RATIO IMBALANCE B1

(Air-fuel ratio imbalance bank 1)

ECM detects a lean/rich air fuel ratio state in any cylinder for a specified length of time.

Fuel injector
Exhaust gas leaks
Incorrect fuel pressure
Mass air flow sensor
Intake air leaks
Lack of fuel
Incorrect PCV hose connection
Improper spark plug
Insufficient compression
The fuel injector circuit is open or shorted
ignition coil
The ignition signal circuit is open or shorted