DTC Advanced Diagnostics: P219A
DTC P219A:Air/Fuel Ratio Variation of Cylinders

General Description

The powertrain control module (PCM) measures the air/fuel ratio by the signal from the air/fuel ratio (A/F) sensor (sensor 1). If the air/fuel ratio varies between the cylinders, the signal from the A/F sensor (sensor 1) fluctuates while all cylinders complete the combustion cycle (two engine revolutions as one cycle). The PCM varies the engine air/fuel ratio at a specified frequency to measure the dispersion between the cylinders, and obtained air/fuel ratio fluctuation are filtered to extract the value. If the ratio between the integrated filtered output and the integrated varied air fuel ratio is a set value or more, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Once per driving cycle
Sequence
None
Duration
CVT model
At least 6.1 seconds but not more than 9.3 seconds
Duration
M/T model
At least 5.6 seconds but not more than 9.2 seconds
DTC Type
Two drive cycles, MIL on
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
Engine coolant temperature
[ECT SENSOR 1]
156 °F (69 °C)
–
Engine speed
[ENGINE SPEED]*1
–
2,500 rpm
Engine speed
[ENGINE SPEED]*2
–
3,000 rpm
Intake air amount*1
1,000 rpm
0.37 g (0.014 oz)
0.5 g (0.017 oz)
1,800 rpm
0.22 g (0.008 oz)
0.57 g (0.02 oz)
Intake air amount*2
1,000 rpm
0.30 g (0.011 oz)
0.5 g (0.017 oz)
2,400 rpm
0.24 g (0.009 oz)
0.6 g (0.021 oz)
Throttle position*3, *4
1,250 rpm
38.0 °
–
2,000 rpm
38.0 °
–
No active DTCs set (prevents monitor from running)*3
P0010, P0011, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0133, P0134, P0135, P0171, P0172, P0201, P0202, P0203, P0204, P0300, P0301, P0302, P0303, P0304, P0335, P0339, P0341, P0351, P0352, P0353, P0354, P0443, P0502, P0720, P1009, P1116, P1128, P1129, P1157, P1172, P145C, P2096, P2097, P2195, P2227, P2228, P2229, P2238, P2252, P2646, P2647, P2648, P2649
No active DTCs set (prevents monitor from running)*4
P0010, P0011, P0088, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0133, P0134, P0135, P0171, P0172, P0201, P0202, P0203, P0204, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0335, P0339, P0341, P0351, P0352, P0353, P0354, P0443, P060A, P1009, P1116, P1128, P1129, P1157, P1172, P145C, P1659, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2096, P2097, P2195, P2238, P2252, P2646, P2647, P2648, P2649, P2A00
No active DTCs set (prevents monitor from running)*5
P0010, P0011, P0088, P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0133, P0134, P0135, P0171, P0172, P0192, P0193, P0201, P0202, P0203, P0204, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0335, P0339, P0341, P0351, P0352, P0353, P0354, P0443, P060A, P1009, P1157, P1172, P1659, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2096, P2097, P2195, P2238, P2252, P2623, P2646, P2647, P2648, P2649, P2A00
*1: CVT model
*2: M/T model
*3:
 
'13
 
*4:
 
'14-15
 
*5:
 
'16-17
 
[ ]: HDS Parameter

Malfunction Threshold
The integrated A/F sensor (sensor 1) output variation value is 5.61 or more in 9.3*1 (9.2)*2seconds.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Fuel injector failure
Engine compression abnormal
Valve clearance incorrect

Confirmation Procedure
Operating Condition

1.
Start the engine. Hold the engine speed [ENGINE SPEED] at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
2.
Drive the vehicle in 4th gear at a steady engine speed [ENGINE SPEED] 1,000 - 1,200 rpm.
3.
Take 10 - 15 seconds to accelerate up to engine speed [ENGINE SPEED] 2,500*1 (3,000)*2 rpm.
4.
When the diagnosis does not finish, repeat driving pattern steps 2 through 3, five times.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
With the HDS
Do the CYLINDER A/F TEST three times in the INSPECTION MENU with the HDS.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.