Understanding trouble codes for my vehicles

Before you buy a new (very expensive) catalytic converter have you had the O2 sensors in the exhaust system checked? These can sometimes trigger the same trouble code and are a lot less expensive to replace. Often it is the 'Downstream' O2 sensor causing the issue. (The one positioned after the catalytic converter).
Usually as long as you get one that is specific to the exhaust on your vehicle it will be the correct one. If it is the stock exhaust buy the one for that exhaust and it should be the correct one.

Why would you change the fuel pump? Fuel Pumps work or they don't work at all. They have the correct pressure to make the vehicle run, or they don't. They don't make the vehicle run a bit slower when going up a hill or accelerating. Stop guessing what the fault is. You need to check the engine diagnostic code when the light comes on. The code tells you the fix. You need an auto electrician with a pro grade scan tool computer. It can record what happens on a drive. You can drive him and the computer to that hill and record it.

https://www.google.com/search?q=mobile+auto+electrician+near+me

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You just made one of the classic DIY blunders by automatically replacing what part was listed in the trouble code without actually reading and understanding the code. No trouble code EVER EVER tells you to replace a part. It only tells you that the sensor reading is out of spec. In this case the code is for the air/fuel heater circuit. The word circuit should have clued you into the fact that it could be the fuse or wiring. That should have been checked before you even considered replacing the sensor. Now that you've wasted money on the sensor, it's time to actually check the sensor heater circuit. For that you'll need a wiring diagram and a DVOM meter

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• 1998 OLDSMOBILE 88 3.8L SFI OHV 6CYL REPAIR GUIDE
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• READING CODES

GM Bonneville/Eighty Eight/LeSabre 1986-1999
Reading Codes

• 1987-97 VEHICLES EXCEPT 1997 MODELS WITH 16-PIN DLC
• 197 VEHICLES WITH 16-PIN DLC AND ALL 1995-99 MODELS

Print

1987-97 VEHICLES EXCEPT 1997 MODELS WITH 16-PIN DLC

See Figures 1 and 2
Listings of the trouble for the various engine control system covered in this manual are located in this section. Remember that a code only points to the faulty circuit, NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones.

Fig. Fig. 1: ALDL/DLC terminal identification for 1987-97 vehicles, except 1997 models with a 16-pin DLC
The Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC) may be located under the dashboard, and is sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

1. The diagnostic trouble codes can be read by grounding test terminal B . The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the ALDL connector.
2. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
3. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition switch OFF and remove the jumper wire. Turn the ignition ON and confirm that the light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
4. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the ECM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
5. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.

The order of codes in the memory does not indicate the order of occurrence.

1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
3. Switch the ignition OFF when finished with code retrieval or scan tool readings.

After making repairs, clear the trouble codes and operate the vehicle to see if it will reset, indicating further problems.

Fig. Fig. 2: Engine diagnostic trouble codes - 1987-93 vehicles, and 1994 vehicles with a 12-pin DLC connector

197 VEHICLES WITH 16-PIN DLC AND ALL 1995-99 MODELS

See Figures 3 through 7

Fig. Fig. 3: DLC terminal identification for 1994 vehicles with a 16-pin DLC, as well as all 1995-99 models
On 1994-95 3.4L and 3.8L engines, and all 1996 models, an OBD-II compliant scan tool must be used to retrieve the trouble codes. Follow the scan tool manufacturer's instructions on how to connect the scan tool to the vehicle and how to retrieve the codes.

Fig. Fig. 4: Engine diagnostic trouble codes (1 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 5: Engine diagnostic trouble codes (2 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 6: Engine diagnostic trouble codes (3 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

Fig. Fig. 7: Engine diagnostic trouble codes (4 of 4) - 1994 vehicles with a 16-pin DLC and all 1995-99 vehicles

If im understanding correctly you are saying that there are 4 layers asphalt and 1 wood? If thats the case it doesn't matter where you live I can tell you that is not code. The absolute most I have ever seen is three comp and 1 wood. That is a lot of weight on your roof. If you live where you will see snow this year I'd have that looked at for safety reasons.

On the Nissan that code means you have a short in the knock sensor circuit or you just need a new knock sensor.

the bank 1 is in the front of your car close to the radiator, the other one is the bank 2. I think you have to replace the bank 1 and bank 2 sensor and the po115 is the coolant temperature sensor, after you replace all these sensors and have the machanic reset or turn off the CHECK ENGINE light. check with the emmission inspector before you begin to replace all these parts. good luck

bank one is the bank closest to the firewall in the manifold but if you replace this one you should do the other or you will get a code for it not long from now because the new sensor will operate much better and faster

I came across a couple of toyota service bulletins addressing these issues (as I am also suffering from rough idling and persistent check engine light(that sometimes blinks)):

Title:
DIAGNOSTIC TROUBLE CODE P1133
Models:
’97 – ’99 Camry: 1MZ–FE CA Spec.
Technical Service
BULLETIN
February 25, 2000
TSB Revision Notice:
The information updated in this TSB is red and underlined.
Under certain driving conditions, some 1MZ–FE equipped 1997 – 1999 Camry California
Emission specification vehicles can exhibit a M.I.L. “ON” DTC P1133. An improved
Air/Fuel Ratio Sensor has been developed to correct this condition.
1997 – 1999 Camry (1MZ–FE) with California Emission Specification.
MODEL YEAR ENGINE STARTING VIN
1999 Camry 1MZ–FE
4T1BF2#K * XU088001
4T1BF2#K * XU933227
PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME
89467–41020 89467–41021 Sensor, Air/Fuel
Should a M.I.L. “ON” condition with DTC P1133 be encountered, perform diagnostic
procedures as described in the Repair Manual.
If the problem source cannot be identified after checking all affected areas according
to the Repair Manual, the cause may be an Air/Fuel Ratio Sensor malfunction. In this
case, replace the Air/Fuel Ratio Sensor with the current part number listed above.
If the Exhaust Manifold threads are damaged by removal of the sensor, they can be
repaired by the proper use of a M18 x 1.5 tap.
OP CODE DESCRIPTION TIME OPN T1 T2
895131 R & R Air/Fuel Ratio Sensor 0.3 89467–41020 99 99
Applicable Warranty*:
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 36,000 miles, whichever occurs first, from the vehicle’s in–service date.
Coverage is extended to 36 months or 50,000 miles, whichever occurs first, in the
states of California and Massachusetts due to state emissions warranty legislation.
NOTE:
Please enter the DTC in the condition/Cause/Remedy section when applying for
warranty reimbursement.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint.
---------------------------------------------------------------------------------------------
Title:
SINGLE CYLINDER MISFIRES
Models:
’99 Avalon, Camry, Sienna & Solara (CA Spec.)
Technical Service
BULLETIN
January 14, 2000
NOTE:
The information contained in this TSB updates EG013–99 dated December 17, 1999.
Some 1999 California Emission Specification Avalon, Camry (1MZ–FE), Sienna & Solara
(1MZ–FE) vehicles may exhibit a rough idle, and or a M.I.L. “ON“ condition, in which a
single cylinder misfire code, or codes are present. Changes have been made in the fuel
injector production process to correct this condition.
1999 CA Emission Spec. TMMK produced Avalon, Camry (1MZ–FE), Sienna &
TMMC produced Solara (1MZ–FE) vehicles built between the VIN numbers listed
below.
MODEL STARTING VIN ENDING VIN
Avalon 4T1BF1#B*XU298504 4T1BF1#B*XU319557
Camry 4T1BF2#K*XU076403 4T1BF2#K*XU081214
Camry (cont.) 4T1BF2#K*XU930024 4T1BF2#K*XU931330
Sienna 4T3ZF1#C*XU090887 4T3ZF1#C*XU122589
Solara (U.S.) 2T1CF2#P*XC111083 2T1CF2#P*XC757508
Solara (Canada) 2T1CF2#P*XC744113 2T1CF2#P*XC162681
APPLICABLE PARTS QUANTITY PART NAME
23209–0A010 6 Fuel Injector
OP CODE VWC DESCRIPTION TIME OPN T1 T2
895221 N R & R Fuel Injector Assembly – All 1.8 23209–0A010 02 56
Applicable Warranty*:
This repair is covered under the Toyota Federal Warranty. This warranty is in effect for
36 months or 36,000 miles, whichever occurs first, from the vehicle’s in–service date.
Coverage is extended to 36 months or 50,000 miles, whichever occurs first, in the
states of California, Massachusetts, and Vermont due to state emission warranty
legislation.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint.
NOTE:
Be sure to enter the DTC No. in the Condition/Cause/Remedy section, if a DTC Code
appeared.
ENGINE
Introduction
Applicable
Vehicles
Parts
Information
Warranty
Information
SINGLE CYLINDER MISFIRE – EG001-00 January 14, 2000
Page 2 of 2
1. Remove all six fuel injectors for
verification of production information.
Affected injectors will be labeled with
a vendor part number of
“23250–0A010“ and have a
production date code number of “828“
or lower (see illustration for number
locations).
2. After determining that one or more of
the injectors are affected, replace all
six injectors with the above applicable
part number.
3. Clear the DTC, if present, and verify
that the vehicle now operates as
designed.