OB99W
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p0446
OB99W replied to charm's topic in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX
Depends on why and how it wound up on the ground. For example, if it went down the filler neck without backing up, you might have a rusted through fuel filler tube. -
In addition to what you've mentioned, it's possible that the rear window isn't properly sealed. Also, if the weatherstripping is compressed (or there was ever a rear-ender that distorted the trunk area. etc.), there might be small gaps between the gasket and trunk lid. Sometimes you can find that type of problem by placing a crisp dollar bill across the gasket (so that part of it is beyond the lid area) and closing the trunk, then try pulling the bill out. Do that in several spots -- any place(s) where the bill is very easy to remove should be looked at more closely.
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Scroll down and read the "Similar Threads". Common problems when P0170 is generated are exhaust leaks, intake leaks, fuel pressure issues (high or low), defective engine coolant temperature sensor (CTS) or intake manifold pressure sensor (or airflow sensor). Basically, the P0170 code indicates the ECU can't compensate enough to get an appropriate A/F mixture. I'd look at the intake first for loose connections, since that's probably the easiest. If you haven't replaced the fuel filter recently, you might consider that. An OBD-II scan tool could be used to determine whether the fuel trims are severely to the rich or lean side, which could help determine a more-likely culprit. Since fuel trims are compensating adjustments, being very rich (positive) means the engine is running lean, while very lean (negative) is an effort to deal with a rich-running condition. None of the above is to say that a bad front O2 sensor isn't causing the problem, but that there are other possibilities. Which engine, again?
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A few possibilities come to mind, but there's a simple one to consider. There are some poorly-manufactured automotive bulbs out there, and they're not all from China. They have various problems, including that some of them draw excessive current, sometimes only until warmed by use. I'd suggest replacing all turn signal bulbs on the affected side with new ones of a different brand than you have. Be sure to get the specified bulb type numbers (don't just match the ones already installed, since there may be a wrong one). That might be all that's necessary, but if not, you can always do further electrical troubleshooting.
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Not to rain on anspaugh777's parade, but that would also be my concern. Disconnecting the TCU and ECU means they'll run on default values for a short while, possibly masking certain problems. On the other hand, perhaps everything will be fine from now on. That's the air intake. Vacuum hoses are also typically black, but much thinner and usually made of rubber; the source of vacuum is ultimately the intake manifold. If anyone is interested in some pretty good online general automotive info (assuming you don't mind a Toyota emphasis), take a look at http://www.autoshop101.com/ . The page there that probably best links to the tutorials is http://www.autoshop101.com/autoshop15.html .
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Code 45: Intake Manifold Pressure SignalDiagnosis: Input signal circuit of TCM from ECM is open or shorted Trouble Symptom: Excessive shift shock However, the first step in the diagnostic procedure for code 45 directs you to the diagnostic for the TPS, which includes the symptom of excessive tight corner "braking". Unfortunately, there's too much to post here. Okay if I send a PM to you with further info, anspaugh777?
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There are several problems that can cause the symptoms you've described. However, if we assume that the trans didn't get damaged while your "friend" worked on the car, one thing that's engine-related and can easily affect the trans is a defective or misadjusted TPS (Throttle Position Sensor). Yes, it can even cause the low speed binding. As has already been suggested, getting the TCU code(s) read is important at this stage -- for example, if a code for the TPS comes back, it will really simplify the repair. Give me a few minutes and I'll post the method of getting the TCU codes without a Select Monitor.
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The noise might still be due to a loose heat shield, or other not-too-significant cause. DTC P0420 isn't always expensive to resolve. While it's the code indicating a catalyst efficiency problem, it doesn't always mean the cat's the culprit. Quite frequently, a failing front O2 sensor is the cause, and replacement with an OEM one solves the problem. EDIT: Nipper posted while I typed. At least we both said about the same thing.