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 A titania oxygen sensor is used on the Corolla GTS except California- and the V-6, 2WD California truck. The sensor uses a thick film of titania at the tip of the element to detect oxygen concentrations in the exhaust gas. The key difference between the titania sensor and the more common zirconia sensor used on all other models is that the zirconia element generates voltages according to the oxygen concentration in the exhaust gas.

Air/Fuel Ratio Sensors of 1MZ-FE (5S-FE) Engines (Toyota Part No. 89467-...)

  The A/F sensor signal voltage varies according to the amount of oxygen sensors in the exhaust stream (see figure). Unlike the signal voltage from a heated oxygen sensors (HO2S), the A/F sensors signal voltage increases as the air-fuel mixture leans and decreases as the air-fuel mixture richens. The signal voltage ranges from 0.48 to 0.80 volts! While the vehicle runs in closed loop mode, the ECU uses the A/F sensor signal to lengthen or shorten the fuel injector pulse width until attaining a stoichiometric air-fuel mixture.

  The A/F sensor contains a ECU-controlled heater. At start-up, the heater helps warm the A/F sensors to quickly operating temperature. With minimal exhaust gas flow, the heater keeps the A/F sensor from cooling down.

   Photo Wide Range Air Fuel Ratio Sensors.

The voltage shown on the chart is what one would see if one were using the factory Toyota scan tool to measure the A/F sensor parameter). Toyota states that the output of this sensor can only be measured with a scan tool. (It appears that the Toyota factory scan tool and the Vetronix Mastertech with the Toyota OE software are the only tools that support this parameter currently). This is not true
Besides, on Engines with these Sensors voltage that corresponds with a specific A/F ratio is above  (to 4.0 Volts).

SAE Diagnostic Trouble Codes Toyota (Some)

DTC P0125 Insufficient Coolant Temp. For Closed Loop (P1154)
DTC P0130 Heated Oxygen Sensor Circuit (Bank 1 Sensor 1)
DTC P0133 Heated Oxygen Sensor Circuit Slow (Bank 1 Sensor 1)
DTC P0135 Heated Oxygen Sensor Heater Circuit (Bank 1 Sensor 1)
DTC P0136 Heated Oxygen Sensor Circuit (Bank 1 Sensor 2)
DTC P0141 Heated Oxygen Sensor Heater Circuit (Bank 1 Sensor 2)
DTC P0150 Heated Oxygen Sensor Circuit (Bank 2 Sensor 1)
DTC P0153 Heated Oxygen Sensor Circuit Slow (Bank 2 Sensor 1)
DTC P0155 Heated Oxygen Sensor Heater Circuit (Bank 2 Sensor 1)
DTC P0171 System Too Lean (Fuel Trim)
DTC P0172 System Too Rich (Fuel Trim)
DTC P0420 Catalyst System Efficiency Below Threshold

DTC , P1031, P1032, P1051, P1052, P1131, P1132, P1151, P1152, P1154
DTC P1130 A/F Sensor Circuit Range Problem
DTC P1133 A/F Sensor Circuit Response Malfunction
DTC P1135 A/F Sensor Heater Circuit Malfunction
DTC P1150 A/F Sensor Circuit Range Problem
DTC P1153 A/F Sensor Circuit Response Malfunction
DTC P1155 A/F Sensor Heater Circuit Malfunction

DTC P2195* Oxygen Sensor Signal Stuck Lean (Bank 1 Sensor 1)

DTC P2196* Oxygen Sensor Signal Stuck Rich (Bank 1 Sensor 1)

DTC P2197* Oxygen Sensor Signal Stuck Lean (Bank 2 Sensor 1)

DTC P2198* Oxygen Sensor Signal Stuck Rich (Bank 2 Sensor 1)

P2237* Oxygen Sensor Pumping Current Circuit / Open (for A/F sensor) (B1S1)

P2238*

P2239*

P2240*

P2241*

P2242* Oxygen Sensor Pumping Current Circuit / High (for A/F sensor) (B2S1)

P2251*

P2252* Oxygen Sensor Reference Ground Circuit Low (for A/F sensor) (B1S1)

P2253* Oxygen Sensor Reference Ground Circuit High (for A/F sensor) (B1S1)

P2254*

P2255* 

P2256* 

P2A00 A/F Sensor Circuit Slow Response (B1S1)

P2A03 A/F Sensor Circuit Slow Response (B2S1)

* - 

79063204.gif (43094 bytes)            79063169.gif (36869 bytes)

a. Disconnect the A/F sensor connector.
b. Using an ohmmeter measure the resistance between  terminals +B and HT. Resistance:
0.8 - 1.4* ohms at 20°C (68°F). If the resistance is not as specified, replace the sensor.
Torque: 44 Nm (440 kgf.cm, 31 ft.lbf)
c. Reconnect the A/F sensor connector.

* On new Cars - to 3.4 ohms

79062351.gif (16888 bytes) 

Parts

OEM Part

Price

Oxygen Sensor 

Image for location

.

Front

.

.

Federal

.89465-06030

.$140.48

.

.

California

.89467-41011

.$257.30

.

Rear

.

.

Federal

.

89465-33120

.$146.35

.

.

California

.

89467-41021

.$257.30

Checking Voltage and Current on Air/Fuel Ratio Sensor

On 2002 Toyota Camry LE

Engine:    3.0 L / 6 cyl / Gas / DOHC
Fuel:       Fuel Injection
Ignition:   Distributorless
Trans:      4-speed Automatic Transaxle (Electronic) U140E
Mileage:       43,318 mi
Emissions:     OBD-II Compliant (ISO 9141-2)
VIN:           4T1BF32K52 (MCV30L-CEPNKA)

  I read DTC (by using scantools CJII and Diagnostic Computer)

1130 "A/F Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)" and 

1135 "A/F Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

  I check and don't understand why this sensor not have Toyota Part No. (OEM)...

  Use description for diagnostic courtesy by John Thornton I check Voltage and DC on this Sensor (photo).
  After installed "new" Sensor (from other, but good Camry) these codes P1130 and P1135  returned. I don't know «what to do (make) and what to check up?"
  After install new Sensor - all is O'k

http://www.clublexus.com/forums/showthread.php?t=181807&page=1&pp=15 

 

NOTE. Toyota has use new "Planar" A/F Sensor. A second generation it Sensor was developed to meet more stringent emission regulations. This A/F Sensor reaches operating temperature faster that the previous (aka Cup Element) A/F sensor. This allows the ECM to go into closed loop vuel control faster when the engine is cold reducing cold start emission.

Like previous O2 and AF Sensors, the planar AFS has ambient air on one side of the ZrO2 and exhaust gases on the other side.

The planar AFS has the same detecting range and signal characteristics as the previous cup element. But heater element has higher resistance! This AFS is not interchangeable with the older, cup element AFS. Heater Resistance (at 68 degr.F)=1.8-3.4 Ohm. The heater is imbedded into aluminum oxide. When the heater is ON, the aluminum oxide conducts heat directly to the zirconium dioxide layer bring the AFS to operating temperature quickly.
The heater monitor continuously detects over current or under current condition and set DTC in one trip.

The never planar AFS can be identified by its shorted body (13 mm).

 

Take a look this the better Descriptions for Diagnostic these Sensors in "Story of the Month" page.

 

Only for Technicians (no amateur:-) go to Anaheim, California  (September 24-26)

Air:Fuel Sensors - Course #002 and #006
Presented by John Thornton of Pro-Tec Auto Repair, Inc.

Description. Over the last 12 years, air/fuel sensors have slowly started to replace oxygen sensors. While these sensors look similar to a conventional oxygen sensor, operation and testing techniques are significantly different.

This class will discuss operation and testing of air/fuel sensors used by Honda, GM (Bosch) and Toyota. The discussion will be divided between 5 wire air/fuel sensors (Bosch/GM and Honda) and 4 wire air/fuel sensors (Toyota).

The focus will be on sensor operation. Once we know how these sensors work, testing becomes much easier. Testing techniques will include the use of a labscope, scan tool and gas analyzer.

 

Presenter. John Thornton, a working technician, co-owns Pro-Tec Auto Repair in the Chicago suburb of Naperville. Mr. Thornton specializes in drivability diagnostics and is an ASE-certified Master Technician with L1 certification.

 

 

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