DTC P0130 OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1

05–101
DIAGNOSTICS
–
SFI SYSTEM (April, 2003)
05DIJ–01
DTC
P0130
OXYGEN SENSOR CIRCUIT MALFUNCTION
(BANK 1 SENSOR 1)
DTC
P2195
OXYGEN SENSOR SIGNAL STUCK LEAN
(BANK 1 SENSOR 1)
DTC
P2196
OXYGEN SENSOR SIGNAL STUCK RICH
(BANK 1 SENSOR 1)
CIRCUIT DESCRIPTION
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum
catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio.
The heated oxygen sensor output voltage changes suddenly in the vicinity of the stoichiometric ratio. The
ECM adjusts the fuel injection time so that the air–fuel ratio is nearly stoichiometric.
When the air–fuel ratio becomes LEAN, the oxygen concentration in the exhaust gas increases. And the
heated oxygen sensor informs the ECM of the LEAN condition (low voltage, i.e. less than 0.45 V).
When the air–fuel ratio is RICHER than the stoichiometric air–fuel ratio, the oxygen will be vanished from
the exhaust gas. And the heated oxygen sensor informs the ECM of the RICH condition (high voltage, i.e.
more than 0.45 V).
Heater
Solid Electrolyte
(Zirconia Element)
Platinum Electrode
Element
Exhaust Gas
A
Output Voltage
Ideal Air–Fuel Mixture
Cover
Richer – Air Fuel Ratio – Leaner
Air
A
A–A Section
DTC No.
A66651
DTC Detection Condition
P0130
Output voltage of heated oxygen sensor remains at 0.4 V or
more, or 0.5 V or less, during idling after engine is warmed up
(2 trip detection logic)
P2195
Output voltage of heated oxygen sensor remains at 0.5 V or
less, during idling after engine is warmed up (2 trip detection
logic)
P2196
Output voltage of heated oxygen sensor remains at 0.4 V or
more, during idling after engine is warmed up (2 trip detection
logic)
Trouble Area
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor heater (bank 1 sensor 1)
EFI relay
Air induction system
y
Fuel pressure
Injector
ECM
HINT:
Sensor 1 refers to the sensor closest to the engine assembly.
The output voltage of the heated oxygen sensor and the short–term fuel trim value can be read using
the hand–held tester or the OBD ll scan tool.
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DIAGNOSTICS
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SFI SYSTEM (April, 2003)
Oxygen sensor output voltage (V)
MONITOR DESCRIPTION
Rich
FAIL
0.5
PASS
FAIL
0.4
FAIL
Lean
Time
Pass / Fail definition of voltage malfunction
A85193
The engine control module (ECM) uses the heated oxygen sensor information to regulate the air–fuel ratio
near to the stoichiometric air–fuel ratio. The sensor detects oxygen levels in the exhaust gases and sends
this signal to the ECM. This maximizes the catalytic converter’s ability to purify the exhaust gases.
The heated oxygen sensor element consists of the platinum coated zirconia and heating element. The inner
surface of sensor element is exposed to the outside air, and the outer surface of sensor element is exposed
to the exhaust gases. The sensor generates between 0 V and 1 V of the voltage output in response to the
oxygen concentration in the exhaust gases. The sensor’s output voltage varies suddenly in the vicinity of
the stoichiometric air–fuel ratio.
Under normal condition, the output voltage from the heated oxygen sensor alternates between RICH and
LEAN sides periodically. When it is 0.4 V or less, the air–fuel ratio is judged as LEAN.
If the heated oxygen sensor outputs RICH signal (or LEAN signal) constantly, or if the heated oxygen sensor
cannot output enough voltage to reach the minimum specification, the ECM interprets this as a malfunction
in the heated oxygen sensor and sets a DTC.
MONITOR STRATEGY
Related DTCs
P0130
Front heated oxygen sensor voltage is constant
P2195
Front heated oxygen sensor voltage is constant at lean side
P2196
Front heated oxygen sensor voltage is constant at rich side
Main sensors
Required sensors/components
Related sensors
Frequency of operation
Once per drive cycles
Duration
18 to 36 seconds x 3
MIL operation
Sequence of operation
Front heated oxygen senor
Crank shaft position sensor, vehicle speed sensor
2 driving cycles
None
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DIAGNOSTICS
–
SFI SYSTEM (April, 2003)
TYPICAL ENABLING CONDITION
Specification
Item
Minimum
The monitor will run whenever the following DTCs are not present
Maximum
See ”List of Disable a Monitor” (On page 05–25)
There is history of following condition (a)
and (b) a met:
20 seconds (Continuously)
–
25 mph (40 km/h)
–
900 rpm
–
(a) Vehicle speed
(b) Engine speed
Time after engine start
120 seconds
–
Idle
ON
Fuel system status
Closed loop
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Threshold
P0130:
Sensor voltage is 0.5 V or less for 18 seconds or more
3 times or more
Sensor voltage is 0.4 V or more for 18 seconds or more
P2195:
Front heated oxygen sensor voltage is 0.5 V or less for 18
seconds or more
3 times or more
P2196:
Front heated oxygen sensor voltage is 0.4 V or more for 18
seconds or more
3 times or more
COMPONENT OPERATING RANGE
Parameter
Standard Value
In the normal condition, the heated oxygen sensor voltage
0 to 1 V
MONITOR RESULT (MODE 06 DATA)
Test ID
Comp ID
Description of test data
Description of test limit
Unit
Conversion factor
$03
–
Not supported by mode $06, but
by mode $05
–
–
–
Refer to page 05–27 for detailed information on Checking Monitor Status.
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DIAGNOSTICS
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SFI SYSTEM (April, 2003)
WIRING DIAGRAM
ECM
P
4
E4
HT1A
B
23
E4
OX1A
P–B
4
E5
HT1B
21
E4
OX1B
(*1)
P
(*1)
From Terminal
3 of EFI Relay
W
B
(*1)
P–B
BR
II2 18
II2 9
W
(*1)
B
II1
6
B
B
1
2
+B HT
3
OX
2
HT
4
OX
E1
4
E1
3
+B
1
H8
Heated
Oxygen
Sensor
(Bank 1
Sensor 2)
1 4B
Center
J/B
H5
Heated
Oxygen
Sensor
(Bank 1
Sensor 1)
4 4B
BR
BR
II2
8
BR
B
A
A
J4
Junction Connector
B
A
A
BR
*1: Shielded
EB
A84873
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DIAGNOSTICS
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SFI SYSTEM (April, 2003)
CONFIRMATION DRIVING PATTERN
Vehicle speed
40 seconds
or more
40 seconds
or more
40 seconds
or more
(d)
(d)
(d)
25 mph
(40 km/h)
Idling(c)
(e)
(e)
(f)
120 seconds
or more
20 seconds
or more
20 secconds
or more
30 seconds
IgnitionOFF
(a) (b)
A85081
(a) Connect the hand–held tester to the DLC3.
(b) Switch the hand–held tester from the ”normal mode” to the ”check mode” (See page 05–11).
(c) Start the engine and let the engine idle for 120 seconds or more.
(d) Drive the vehicle at 25 mph (40 km/h) or more for 40 seconds or more.
(e) Let the engine idle for 20 seconds or more. Perform steps (d) and (e) at least 3 times.
(f)
Let the engine idle for 30 seconds.
HINT:
If a malfunction exists, the MIL will be illuminated on the multi information display during step (f).
NOTICE:
If the conditions in this test are not strictly followed, detection of a malfunction will not occur.
If you do not have the hand–held tester, turn the ignition switch OFF after performing steps from (c)
to (f), then perform steps from (c) to (f) again.
INSPECTION PROCEDURE
HINT:
Hand–held tester only:
Narrowing down the trouble area is possible by performing ”A/F CONTROL” ACTIVE TEST (heated oxygen
sensor or other trouble areas can be distinguished).
(a) Perform ACTIVE TEST using hand–held tester (A/F CONTROL).
HINT:
”A/F CONTROL” is the ACTIVE TEST which changes the injection volume to –12.5 % or +25 %.
(1) Connect the hand–held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch ON.
(3) Warm up the engine by running the engine speed at 2,500 rpm for approximately 90 seconds.
(4) Select the item ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL”.
(5) Perform ”A/F CONTROL” with the engine in an idle condition (press the right or left button).
Result:
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume
+25 % → rich output: More than 0.5 V,
–12.5 % → lean output: Less than 0.4 V
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DIAGNOSTICS
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SFI SYSTEM (April, 2003)
NOTICE:
There is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds
delay at maximum in the sensor 2 (rear sensor).
Output voltage of heated oxygen
sensor (sensor 1: front sensor)
Injection volume
+25 %
–12.5 %
–12.5 %
Case 1 Output voltage
Less than 0.4 V
OK
More than 0.5 V
Injection volume
+25 %
–12.5 %
–12.5 %
Case 2 Output voltage
Sensor 1: front sensor
(sensor 1, heater, sensor 1
circuit)
Output voltage
NG
Injection volume
More than 0.5 V
OK
Less than 0.4 V
Injection volume
+25 %
+25 %
–12.5 %
–12.5 %
Case 3 Output voltage
Sensor 2: rear sensor
(sensor 2, heater, sensor 2
circuit)
Output voltage
More than 0.5 V
OK
Injection volume
NG
No reaction
Injection volume
+25 %
+25 %
–12.5 %
–12.5 %
Case 4 Output voltage
No reaction
OK
Less than 0.4 V
+25 %
Less than 0.4 V

Output voltage
Injection volume
No reaction
Mainly suspect
trouble area
Injection volume
+25 %
More than 0.5 V
Output voltage of heated oxygen
sensor (sensor 2: rear sensor)
Output voltage
NG
No reaction
NG
Extremely rich or lean actual
air–fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.)
The following of A/F CONTROL procedure enables the technician to check and graph the voltage outputs
of both the heated oxygen sensors.
For displaying the graph indication, enter ”ACTIVE TEST / A/F CONTROL / USER DATA”, then select ”O2S
B1S1 and O2S B1S2” by pressing ”YES” button and push ”ENTER” button before pressing ”F4” button.
NOTICE:
If the vehicle is short of fuel, the air–fuel ratio becomes LEAN and heated oxygen sensor DTCs will
be recorded, and the MIL then comes on.
HINT:
If different DTCs related to different systems that have terminal E2 as the ground terminal are output
simultaneously, terminal E2 may be open.
Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio
was lean or rich, etc. at the time of the malfunction.
A high heated oxygen sensor (sensor 1) voltage (0.5 V or more) could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
A low heated oxygen sensor (sensor 1) voltage (0.4 V or less) could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
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DIAGNOSTICS
1
(a)
(b)
(c)
(d)
–
SFI SYSTEM (April, 2003)
CHECK OTHER DTC OUTPUT(IN ADDITION TO HEATED OXYGEN SENSOR
DTCS)
Connect the hand–held tester or the OBD II scan tool to the DLC3.
Turn the ignition switch ON and push the hand–held tester or the OBD II scan tool main switch ON.
Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.
Read the DTCs.
Result:
Display (DTC output)
Proceed to
”P0130, P2195 and/or P2196”
A
”P0130, P2195 and/or P2196” and other DTCs
B
HINT:
If any other codes besides P0130, P2195 and/or P2196 are output, perform the troubleshooting for those
DTCs first.
B
GO TO RELEVANT DTC CHART
(See page 05–35)
A
2
(a)
(b)
(c)
(d)
(e)
READ VALUE OF HAND–HELD TESTER OR OBD II SCAN TOOL(OUTPUT
VOLTAGE OF HEATED OXYGEN SENSOR)
Connect the hand–held tester or the OBD II scan tool to the DLC3.
Start the engine and push the hand–held tester or the OBD II scan tool main switch ON.
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / O2S B1S1”.
Warm up the heated oxygen sensor with the engine speed at 2,500 rpm for approximately 90 seconds.
Read the output voltage of the heated oxygen sensor during idling.
Heated oxygen sensor output voltage:
Alternates repeatedly between less than 0.4 V and more than 0.5 V (See the following table).
A85076
OK
Go to step 9
NG
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DIAGNOSTICS
3
–
SFI SYSTEM (April, 2003)
INSPECT HEATED OXYGEN SENSOR(HEATER RESISTANCE)
(a)
(b)
Component Side:
Heated Oxygen Sensor
H5
HT
Bank 1, +B
Sensor 1
OX
E1
Front View
(c)
A79112
Disconnect the H5 heated oxygen sensor connector.
Measure the resistance between the terminals of the
heated oxygen sensor connector.
Standard:
Tester Connection
Specified Condition
HT (H5–1) – +B (H5–2)
5 to 10 Ω at 20 C (68 F)
HT (H5–1) – E1 (H5–4)
10 kΩ or higher
Reconnect the heated oxygen sensor connector.
NG
REPLACE HEATED OXYGEN SENSOR
OK
4
INSPECT EFI RELAY
(a)
(b)
Remove the EFI relay from the engine room R/B.
Check for continuity in the EFI relay.
Standard:
Tester Connection
Specified Condition
1–2
Continuity
No continuity
3–5
E34090
(c)
Continuity
(Apply battery voltage to terminals 1 and 2)
Reinstall the EFI relay.
NG
REPLACE EFI RELAY
OK
2004 COROLLA (RM1037U)
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Date:
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DIAGNOSTICS
5
–
SFI SYSTEM (April, 2003)
CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR – ECM)
Wire Harness Side:
H5 Heated Oxygen Sensor Connector
Bank 1 Sensor 1
(a)
(b)
(c)
HT
Disconnect the H5 heated oxygen sensor connector.
Disconnect the E4 ECM connector.
Check the resistance between the wire harness side connectors.
Standard (Check for open):
Tester Connection
OX
Specified Condition
HT (H5–1) – HT1A (E4–4)
Below 1 Ω
OX (H5–3) – OX1A (E4–23)
Front View
Standard (Check for short):
A79114
Tester Connection
Specified Condition
HT (H5–1) or HT1A (E4–4) – Body ground
10 kΩ or higher
OX (H5–3) or OX1A (E4–23) – Body ground
E4
(d)
(e)
Reconnect the ECM connector.
Reconnect the heated oxygen sensor connector.
OX1A
HT1A
ECM Connector
A55007
A65745
Reference (Bank 1 Sensor 1 System Drawing)
EFI Relay
From
Battery
EFI Fuse
ECM
Heated Oxygen Sensor
Heater
HT1A
Sensor
OX1A
From
Terminal 6 of
Ignition Switch
Duty
Control
Ground Ground
A82244
NG
REPAIR OR
CONNECTOR
REPLACE
HARNESS
OR
OK
2004 COROLLA (RM1037U)
Author:
Date:
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DIAGNOSTICS
6
(a)
–
SFI SYSTEM (April, 2003)
CHECK AIR INDUCTION SYSTEM
Check the air induction system for vacuum leaks.
NG
REPAIR OR REPLACE AIR INDUCTION SYSTEM
OK
7
(a)
CHECK FUEL PRESSURE (See page 11–5)
Check the fuel pressure (high or low pressure).
NG
REPAIR OR REPLACE FUEL SYSTEM
OK
8
INSPECT FUEL INJECTOR ASSY(INJECTION AND VOLUME) (See page 11–7)
NG
REPLACE FUEL INJECTOR ASSY
OK
REPLACE HEATED OXYGEN SENSOR
9
PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
10
(a)
(b)
(c)
READ OUTPUT DTC(HEATED OXYGEN SENSOR DTCS ARE OUTPUT AGAIN)
Connect the hand–held tester or the OBD II scan tool to the DLC3.
Turn the ignition switch ON and push the hand–held tester or the OBD II scan tool main switch ON.
Read the DTC using the hand–held tester or the OBD II scan tool.
Result:
Display (DTC output)
Proceed to
”P0130, P2195 and/or P2196”
A
”P0130, P2195 and/or P2196” are not output
B
B
CHECK FOR INTERMITTENT PROBLEMS
(See page 05–41)
A
REPLACE HEATED OXYGEN SENSOR
2004 COROLLA (RM1037U)
Author:
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