99 solara with many lights!!! P0171 P0125 P01130. etc... - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 12-31-2006, 12:56 PM   #1 (permalink)
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99 solara with many lights!!! P0171 P0125 P01130. etc...

Hello,
I have a 99 solara SLE v6 with to many CEL codes.
P0171, P0125, P0300 (Missfires cyl 1-4), P1130, P1135, P1153, P1155.

I have looked up the codes and know what they mean. Now, I am wondering what should be replaced first. The A/F sensor? The MAF? The Temperature sensor?
My research is telling me I should start with the A/F sensor. But does anyone think I should replace anything else?

Also, How do I know if I have a California emissions or a Federal Emissions vehicle?

this is what i have researched so far:
P0125 Insufficient Coolant Temperature closed loop fuel control (non-California)
Open or short in heated oxygen sensor (bank 1, sensor 1) circuit
Heated oxygen sensor (bank 1, sensor 1) malfunction
PCM malfunction

P0125 Insufficient Coolant Temperature closed loop fuel control (California)
Open or short in air/fuel (A/F) sensor circuit
A/F sensor malfunction
PCM malfunction

A code P0125 may mean that one or more of the following has happened:

* Insufficient warm up time
* Low engine coolant level
* Leaking or stuck open thermostat
* Faulty coolant temperature sensor

P0171 System too lean
Loose air intake hose or duct
Incorrect fuel line pressure
Obstruction in injector
Heated oxygen sensor malfunction
MAP or MAF sensor malfunction
ECT sensor malfunction

P0300 Random or Multiple Cylinder Misfire Detected
Ignition system malfunction
Injector malfunction
Incorrect fuel line pressure
EGR malfunction
Incorrect compression pressure
Incorrect valve clearance
Incorrect valve timing
MAP or MAF sensor malfunction
ECT sensor malfunction

P1130 Air-Fuel Sensor Circuit Range/Performance.
P1135 Air-Fuel Sensor Heater Circuit Response.
P1153 A/F Sensor Circuit Response.
P1155 A/F Sensor Heater Circuit.
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Old 01-21-2007, 11:43 PM   #2 (permalink)
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if am not wrong, the air sensors on bank one mean the ones before the catalytic converter.the maf's the one right before the airfilter which probably ring s up the p1135 code, i personally dont have an idea,on what to replace first. only thing i do know is that it'll still run, only u will be pushing your converter if it goes past a couple thousand miles like that. -since most of these are rooted from a common issue that grew with time.
u know it is california emissions if the sticker on your hood ( the one close to the clip thingy )says so. if it dosent, then it's not. simple
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Old 01-22-2007, 09:19 AM   #3 (permalink)
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Quote:
Originally Posted by aleki2424
i
u know it is california emissions if the sticker on your hood ( the one close to the clip thingy )says so. if it dosent, then it's not. simple

Maybe not. I'm doing an engine change right now and my hood said California emissions, the Dealer said it was Calif. but the engine turned out to be a Federal. It was the origininal engine.

Look behind the head between injectors two and three. If there is an air hose there it's a California.
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Old 03-29-2007, 05:10 PM   #4 (permalink)
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I have California Emissions. I know this because I replaced both AF sensors and the part numbers matched the ones I bought (which were specifically for cali emissions).

Now, I think my catalytic converter is bad, Is there a difference between federal and cali emissions cats? Ive seen them priced from 60$ all the way to 300$.
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Old 04-14-2007, 09:15 PM   #5 (permalink)
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USA

Wow. Lots of codes. There may be more going on than bad sensors.

MAF sensors are expensive. O2 or AF sensors are common. A good choice.
Bosch O2 or AF on ebay for $85. Most parts stores ~$140.

Clear the MIL code before replacing.

Did you trying clearing all the codes at the OBII port. You can also try disconneting the neg terminal on the battery of 30mins to clear them.

See what comes back. Check for loose or corroded connetors to sensors or computer.
Check for loose/bad vac hoses etc.

Was the intake or TB cleaned recently? The wrong solvent can ruin many sensors and the cat but should not damage AF sensor heaters.. The AF heater is used to bring up to temp of the sensor quickly for better emissions control, but should not impact perfomance after the engine is at temp. It is hard to kill a cat if your engine is running well.

Does it misfire/rough idle or is the code saying it misfires?
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Old 04-14-2007, 09:31 PM   #6 (permalink)
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Oh yeah. Some sensors can be bench tested. Could be some of the sensors are not bad, but they are sensing a problem with your engine. Tune up?
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Old 04-15-2007, 11:34 AM   #7 (permalink)
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I would clean the MAF sensor, clear the codes and see what all comes back on. With that many codes in the system its hard to figure whats actually wrong. I would just try to eliminate the general ones first like the 171 and 300 codes.
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