- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001HT6B |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [03/2019 - 11/2022] |
| Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P219A,P219C-P219F; Bank 1 Air-Fuel Ratio Imbalance; 2020 - 2023 MY Corolla [03/2019 - 11/2022] | ||
|
DTC |
P219A |
Bank 1 Air-Fuel Ratio Imbalance |
|
DTC |
P219C |
Cylinder 1 Air-Fuel Ratio Imbalance |
|
DTC |
P219D |
Cylinder 2 Air-Fuel Ratio Imbalance |
|
DTC |
P219E |
Cylinder 3 Air-Fuel Ratio Imbalance |
|
DTC |
P219F |
Cylinder 4 Air-Fuel Ratio Imbalance |
DESCRIPTION
Refer to DTC P0031.
Click here
![2020 - 2023 MY Corolla [03/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P0031,P0032,P101D; Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)+](/t3Portal/stylegraphics/info.gif)
Refer to DTC P0300.
Click here
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P219A |
Bank 1 Air-Fuel Ratio Imbalance |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
Comes on |
DTC stored |
DTC for Mexico Models - Does not apply |
|
P219C |
Cylinder 1 Air-Fuel Ratio Imbalance |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
Comes on |
DTC stored |
DTC for Mexico Models - Does not apply |
|
P219D |
Cylinder 2 Air-Fuel Ratio Imbalance |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
Comes on |
DTC stored |
DTC for Mexico Models - Does not apply |
|
P219E |
Cylinder 3 Air-Fuel Ratio Imbalance |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
Comes on |
DTC stored |
DTC for Mexico Models - Does not apply |
|
P219F |
Cylinder 4 Air-Fuel Ratio Imbalance |
The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic). |
|
Comes on |
DTC stored |
DTC for Mexico Models - Does not apply |
MONITOR DESCRIPTION
Fuel System Air Fuel Ratio Cylinder Imbalance Monitor
The ECM uses the air fuel ratio sensor and crank position sensor to monitor the difference in air fuel ratios between the cylinders caused by differences in injection volumes between the cylinders, leakage in the intake or exhaust system, etc.
When the air fuel ratios of the cylinders are lean or rich with respect to each other, the ECM determines that a problem is present and stores a DTC.
Air Fuel Ratio Sensor Monitoring Method: P219A is stored primarily when a rich side imbalance is detected.
When the system detects a difference in air fuel ratios between the cylinders due to fluctuation in the air fuel ratio sensor output over 1 engine cycle (2 crankshaft revolutions), the system determines that there is a problem.
Crank Position Sensor Monitoring Method: P219C, P219D, P219E, and/or P219F are stored primarily when a lean side imbalance is detected.
The system monitors the engine speed variation and when the variation becomes large, the system determines that there is a difference in air fuel ratios between the cylinders, which it determines to be a problem.
MONITOR STRATEGY
|
Related DTCs |
P219A: Air fuel ratio cylinder imbalance monitor (Bank 1) P219C: Air fuel ratio cylinder imbalance monitor (Cylinder 1) P219D: Air fuel ratio cylinder imbalance monitor (Cylinder 2) P219E: Air fuel ratio cylinder imbalance monitor (Cylinder 3) P219F: Air fuel ratio cylinder imbalance monitor (Cylinder 4) |
|
Required Sensors/Components (Main) |
Air fuel ratio sensor Crank position sensor |
|
Required Sensors/Components (Related) |
Mass air flow meter sub-assembly Engine coolant temperature sensor Vehicle speed sensor |
|
Frequency of Operation |
Once per driving cycle |
|
Duration |
10 seconds: P219A 30 seconds: Others |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Monitor runs whenever the following DTCs are not stored |
P0010 (Camshaft timing oil control valve) P0011 (VVT system - advance) P0012 (VVT system - retard) P0013 (Exhaust camshaft timing oil control valve) P0014 (Exhaust VVT system - advance) P0015 (Exhaust VVT system - retard) P0016 (VVT system - misalignment) P0017 (Exhaust VVT system - misalignment) P0031, P0032 (Air fuel ratio sensor heater) P0102, P0103 (Mass air flow meter) P0107, P0108 (Manifold absolute pressure) P0115, P0117, P0118 (Engine coolant temperature sensor) P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0335 (Crank position sensor) P0340, P0342, P0343 (Cam position sensor) P0365, P0367, P0368 (Exhaust cam position sensor) P0500 (Vehicle speed sensor) P264A, P2646, P2647, P1055, P10A0, P2648, P2649, P1049, P104A, U011B (Rocker arm control module) |
P219A
|
Air fuel ratio sensor status |
Activated |
|
Engine speed |
1600 rpm or higher, and less than 2800 rpm |
|
Engine coolant temperature |
73°C (163.4°F) or higher |
|
Atmospheric pressure |
76 kPa(abs) [11 psi(abs)] or higher |
|
Fuel system status |
Closed loop |
|
Engine load |
50% or higher, and less than 75% |
P219C, P219D, P219E, P219F
|
Vehicle speed |
Less than 3 km/h (1.875 mph) |
|
Engine speed |
425 rpm or higher, and less than 1200 rpm |
|
Engine coolant temperature |
73°C (163.4°F) or higher |
|
Air fuel ratio sensor status |
Activated |
|
Fuel system status |
Closed loop |
|
Battery voltage |
11 V or higher |
TYPICAL MALFUNCTION THRESHOLDS
P219A
|
Air fuel ratio sensor monitoring method criteria (rich side imbalance) |
0.156 or more |
P219C, P219D, P219E, P219F
|
Crank position sensor monitoring method criteria (lean side imbalance) |
1 or more |
MONITOR RESULT
Refer to detailed information in Checking Monitor Status.
Click here
P219A: Fuel System / A/F SENSOR DETERMINATION B1
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$81 |
$81 |
Multiply by 0.00003 |
No dimension |
Monitoring method using air fuel ratio sensor |
P219C: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #1
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$81 |
$85 |
Multiply by 0.001 |
No dimension |
Monitoring method using crank angle sensor |
P219D: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #2
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$81 |
$86 |
Multiply by 0.001 |
No dimension |
Monitoring method using crank angle sensor |
P219E: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #3
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$81 |
$87 |
Multiply by 0.001 |
No dimension |
Monitoring method using crank angle sensor |
P219F: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #4
|
Monitor ID |
Test ID |
Scaling |
Unit |
Description |
|---|---|---|---|---|
|
$81 |
$88 |
Multiply by 0.001 |
No dimension |
Monitoring method using crank angle sensor |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
-
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N (neutral).
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Drive the vehicle at 60 km/h (37 mph) or higher for 2 minutes or more [B].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
It is acceptable to turn electrical loads on while driving.
-
Idle the engine for 2 minutes or more [C].
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N (neutral).
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
-
Drive the vehicle at less than 30 km/h (19 mph) for 5 seconds or more [E].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
-
Accelerate the vehicle from 30 to 60 km/h (19 to 37 mph) over a period of approximately 10 to 20 seconds.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Refer to the values of mass air flow and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
-
Drive the vehicle at 60 km/h (37 mph) or more for 5 seconds or more [F].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
-
Drive the vehicle at less than 30 km/h (19 mph) for 5 seconds or more [G].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
-
Accelerate the vehicle from 30 to 60 km/h (19 to 37 mph) over a period of approximately 10 to 20 seconds.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Refer to the values of mass air flow and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
-
Drive the vehicle at 60 km/h (37 mph) or more for 5 seconds or more [H].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Repeat steps [G] through [H] above at least 2 times [I].
-
Idle the engine for 1 minute or more [J].
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N (neutral).
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [K].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P219A, P219C, P219D, P219E or P219F.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform the confirmation driving pattern and check the judgment result again.
- If the judgment result shows N/A, perform the following procedure.
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
Refer to Fuel Injector Circuit.
Click here
CAUTION / NOTICE / HINT
HINT:
- Sensor 1 refers to the sensor closest to the engine assembly.
- Sensor 2 refers to the sensor farthest away from the engine assembly.
- When any air-fuel ratio imbalance is detected, the ECM will perform air-fuel ratio feedback control to make the air-fuel ratio close to the stoichiometric level. This may result in an air-fuel ratio imbalance of normal cylinders and DTCs may be stored.
- Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
|
1. |
CHECK ANY OTHER DTCS OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P219A, P219C, P219D, P219E and/or P219F is output |
A |
|
DTC P219A, P219C, P219D, P219E and/or P219F and other DTCs are output |
B |
HINT:
If any DTCs other than DTC P219A, P219C, P219D, P219E and/or P219F are output, troubleshoot those DTCs first.
| B |
|
GO TO DTC CHART
|
|
|
2. |
READ VALUE USING TECHSTREAM (FREEZE FRAME DATA) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Using the Techstream, confirm the vehicle conditions recorded in the Freeze Frame Data which were present when the DTC was stored.
Powertrain > Engine and ECT > DTC(P219A) > Freeze Frame Data
|
Tester Display |
|---|
|
Vehicle Speed |
|
Engine Speed |
|
Calculate Load |
|
Short FT B1S1 |
|
Long FT B1S1 |
|
Cylinder #1 Misfire Count |
|
Cylinder #2 Misfire Count |
|
Cylinder #3 Misfire Count |
|
Cylinder #4 Misfire Count |
Freeze Frame Data Items for DTC P219A, P219C, P219D, P219E or P219F
- Vehicle Speed
- Engine Speed
- Calculate Load
- Short FT B1S1
- Long FT B1S1
- Cylinder #1 Misfire Count to Cylinder #4 Misfire Count
HINT:
When the sum of Short FT and Long FT is positive, the engine is running lean, and when the sum is negative, the engine is running rich.
|
Air Fuel Ratio Sensor Monitoring Method (P219A) |
Crank Position Sensor Monitoring Method (P219C, P219D, P219E and P219F) |
Note |
|---|---|---|
|
DTCs are output |
DTC is output (Only one DTC relating to a single cylinder is output) |
Malfunctioning of cylinders detected by the Crank Position Sensor Monitoring Method is primarily suspected |
|
DTCs are output |
DTCs are output (Multiple DTCs relating to multiple cylinders are output) |
Malfunctioning of cylinders except ones detected by the Crank Position Sensor Monitoring Method is primarily suspected.* |
|
DTCs are not output |
DTCs are output |
Malfunctioning of cylinders detected by the Crank Position Sensor Monitoring Method is primarily suspected. |
|
DTCs are output |
DTCs are not output |
Malfunctioning of the bank detected by the Air Fuel Ratio Sensor Monitoring Method is primarily suspected. |
*: When any air-fuel ratio imbalance is detected, the ECM will perform air-fuel ratio feedback control to make the air-fuel ratio close to the stoichiometric level. This may result in an air-fuel ratio imbalance of normal cylinders and DTCs may be stored.
|
|
3. |
READ DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
HINT:
- If any misfire count ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") increases while idling or driving the vehicle, proceed to step 6.
- Perform inspections while focusing on the cylinder whose misfire count has increased.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(f) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC P219A is output |
A |
|
DTC P219A and P219C, P219D, P219E or P219F is output |
B |
|
DTC P219C, P219D, P219E and/or P219F is output |
| B |
|
|
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Warm up the engine.
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N (neutral).
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Cylinder #1 to #4 Misfire Count.
Powertrain > Engine and ECT > Active Test
|
Active Test Display |
|---|
|
Control the Injection Volume |
|
Data List Display |
|---|
|
Cylinder #1 Misfire Count |
|
Cylinder #2 Misfire Count |
|
Cylinder #3 Misfire Count |
|
Cylinder #4 Misfire Count |
HINT:
When the "Control the Injection Volume" Active Test is selected (injection volume is 0%), if a misfire count increases, proceed to step 6 (Check Intake System).
(f) Perform the Control the Injection Volume operation with the engine idling.
(g) Check the misfire counts ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") while decreasing the injection volume in 5% increments.
NOTICE:
Do not decrease the injection volume by higher than 20%.
The cylinder whose misfire count has not increased can be assumed to be running rich. Therefore, perform inspections while focusing on that cylinder.
|
|
5. |
CHECK FOR EXHAUST GAS LEAK |
(a) Check for exhaust gas leak.
OK:
No gas leaks in exhaust system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the exhaust system.
Click here
| NG |
|
REPAIR OR REPLACE EXHAUST SYSTEM |
|
|
6. |
CHECK INTAKE SYSTEM |
(a) Check the intake system for vacuum leaks.
Click here
OK:
No leaks in the intake system.
HINT:
Perform "Inspection After Repair" after repairing or replacing the intake system.
Click here
| NG |
|
REPAIR OR REPLACE INTAKE SYSTEM |
|
|
7. |
INSPECT SPARK PLUG |
(a) Inspect the spark plug of the cylinder causing the imbalance.
Click here
HINT:
Perform "Inspection After Repair" after replacing the spark plug.
Click here
| NG |
|
|
|
8. |
CHECK FOR SPARK (SPARK TEST) |
(a) Perform a spark test.
Click here
HINT:
- If the result of the spark test is normal, proceed to the next step.
-
Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly.
Click here
|
|
9. |
CHECK CYLINDER COMPRESSION PRESSURE |
(a) Measure the cylinder compression pressure of the misfiring cylinder.
Click here
HINT:
Perform "Inspection After Repair" after repairing or replacing the engine assembly.
Click here
| NG |
|
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION |
|
|
10. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY) |
|
(a) Disconnect the fuel injector assembly connectors. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C33-1 - Body ground |
Ignition switch ON |
11 to 14 V |
|
C34-1 - Body ground |
Ignition switch ON |
11 to 14 V |
|
C35-1 - Body ground |
Ignition switch ON |
11 to 14 V |
|
C36-1 - Body ground |
Ignition switch ON |
11 to 14 V |
| NG |
|
|
|
11. |
CHECK FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE |
(a) Check the fuel injector assembly injection (whether fuel volume is high or low, and whether injection pattern is poor).
Click here
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly.
Click here
| NG |
|
REPLACE FUEL INJECTOR ASSEMBLY
|
|
|
12. |
CHECK FOR CAUSE OF FAILURE |
(a) If the cause of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.
(b) Check the intake valve for deposits.
HINT:
As the DTC may have been stored due to deposits on the intake valve, remove the cylinder head and check the intake valve.
|
|
13. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCs
(e) Turn the ignition switch off and wait for at least 30 seconds.
|
|
14. |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED |
(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(b) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(c) Check for DTCs.
Powertrain > Engine and ECT > Trouble Codes
DTC is not output.
| NEXT |
|
END |
|
|