DTC P219A, P219B (19-21 9-Speed A/T)
DTC P219A : Air-Fuel Ratio Variation of Cylinder (Bank 1, Rear Bank)
DTC P219B : Air-Fuel Ratio Variation of Cylinder (Bank 2, Front Bank)
NOTE:
- Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
- If any of the DTCs listed below are indicated at the same time as DTC P219A and/or P219B, troubleshoot those DTCs first, the recheck for P219A and/or P219B.
P0130, P0133, P0150, P0153, P2237, P2238, P2240, P2241, P2243, P2245, P2247, P2249, P2251, P2252, P2254, P2255, P2A00, P2A03: A/F sensor (Sensor 1)
P0134, P0135, P0154, P0155: A/F sensor (Sensor 1) heater
P0201, P0202, P0203, P0204, P0205, P0206: No. 1 - No. 6 cylinder injector (s)
P0300: Random misfire
P0301, P0302, P0303, P0304, P0305, P0306: No. 1 - No. 6 cylinder misfire
P0351, P0352, P0353, P0354, P0355, P0356: No. 1 - No. 6 cylinder Ignition coil power circuit
| DTC Description | Confirmed DTC | Pending DTC |
|---|---|---|
| P219A Air-Fuel Ratio Variation of Cylinder (Bank 1, Rear Bank) | ||
| P219B Air-Fuel Ratio Variation of Cylinder (Bank 2, Front Bank) |
DTC (PGM-FI)
- Problem verification (CYLINDER A/F TEST with HDS)
- 1. Turn the vehicle to the ON mode.
- 2. Record the following HDS on-board snapshot parameters:
- VEHICLE SPEED
- ENGINE SPEED
- MAP SENSOR
- ECT SENSOR 1
- APP SENSOR
- ST FUEL TRIM B1
- ST FUEL TRIM B2
On-board Snapshot
- 3. Start the engine.
- 4. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 5. Check under these conditions:
- A/C off
- All electrical loads off
- 6. Do the CYLINDER A/F TEST three times in the INSPECTION MENU with the HDS.
CYLINDER A/F TEST
Is the result OK?
YES
Go to step 2.
NO
Go to step 3.
- Problem verification (OBD STATUS check)
- 1. Test-drive the vehicle in the range of these recorded on-board snapshot parameters:
- VEHICLE SPEED
- ENGINE SPEED
- MAP SENSOR
- ECT SENSOR 1
- APP SENSOR
- ST FUEL TRIM B1
- ST FUEL TRIM B2
On-board Snapshot
Signal Current conditions Values Unit VEHICLE SPEED ENGINE SPEED MAP SENSOR ECT SENSOR 1 APP SENSOR ST FUEL TRIM B1 ST FUEL TRIM B2 - 2. Monitor the OBD STATUS for DTC P219A and/or P219B in the DTCs MENU with the HDS.
DTC Description OBD STATUS P219A Air-Fuel Ratio Variation of Cylinder (Bank 1, Rear Bank) P219B Air-Fuel Ratio Variation of Cylinder (Bank 2, Front Bank) Does the HDS indicate FAILED?
YES
The failure is duplicated. Go to step 3.
NO
If the HDS indicates PASSED, intermittent failure, the system is OK at this time.
If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
If the HDS indicates EXECUTING, continue driving until a result appears. If the HDS indicates OUT OF CONDITION, go to step 2-1 and recheck.
- Engine compression check
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Do an engine compression inspection.
Is there a cylinder with lower compression than the other cylinders?
YES
Repair the engine compression problem.
NO
Go to step 4.
- Valve clearance check
- 1. Inspect the valve clearance.
Is the valve clearance OK?
YES
Go to step 5.
NO
- Problem verification (CYLINDER A/F TEST with HDS)
- 1. Start the engine.
- 2. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 3. Check under these conditions:
- A/C off
- All electrical loads off
- 4. Do the CYLINDER A/F TEST three times in the INSPECTION MENU with the HDS.
CYLINDER A/F TEST
Is the result OK?
YES
Intermittent failure, the system is OK at this time. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to:
How to Troubleshoot the Fuel and Emissions Systems .
NO
Go to step 6.
- EGR flow line visual check
- 1. Check for a carbon or sludge in the EGR line.
Is there carbon or sludge?
YES
Clean the intake manifold EGR port and the EGR pipe with throttle plate cleaner. Also, clean the passage inside the EGR valve with throttle plate cleaner.
NO
Go to step 7.
- Intake and exhaust manifold visual check
- 1. Check for carbon build-up in the intake manifold and the exhaust manifold.
Is there carbon build-up in the intake manifold and/or exhaust manifold?
YES
Check the engine for oil leaks. If needed, repair the engine, also remove the carbon.
NO
Go to step 8.
- Injector check
- 1. Exchange the injector from the problem cylinder with one from another cylinder.
- 2. Start the engine.
- 3. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
- 4. Check under these conditions:
- A/C off
- All electrical loads off
- 5. Do the CYLINDER A/F TEST three times in the INSPECTION MENU with the HDS.
CYLINDER A/F TEST
Is an injector failure indicated at the cylinder where the injector was exchanged?
YES
Replace all injectors as a set - Refer to: Injector Removal and Installation (19-21 9-Speed A/T) .
NO
Intermittent failure, the system is OK at this time. Check the engine for oil leaks.
If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems .