exhaust system or even an oxigen sensor problem. This particular car is famous for a rubber crankcase breather hose at the back of the block persishing letting in unmetered air. The hose runs from the
exhaust system or even an oxygen sensor problem. This particular car is famous for a rubber crankcase breather hose at the back of the block persishing letting in unmetered air. The hose runs from the
exhaust. Cleaning the MAF is unlikely to make a difference, as if this is the problem you'll either get a lean code for both banks (P0171 and P0174) or a MAF sensor code (P0101). If the O2 sensor is a
fault code 171 engine misfire at high rpm Code 171 = Fuel system lean. This is most likely caused by a vacuum leak in a small vacuum hose or a leaking gasket on the intake or an exhaust leak.
...i can not pass emissions test. Have you a leak in the exhaust??even a small leak will cause the lambda value to be out check your exhaust How about the post cat O2 sensors? Are they working
small leak code p0128 indicates a mechanical fault ( could be the thermostat stuck open) code p0174 -system too lean -bank2 ===causes --intake /exhaust leak--fuel pressure/pump--injectors--AIR system-
Question about Toyota Cars & Trucks
...page. https://www.obd-codes.com/p0171 p0171 means that you sensor is reading a lean message. There is probably a small vacuum leak around your intake manifold or a small exhaust leak near the
...small V-8. The tester returns codes P0171, P0172, P0174 and P0175. What does all this mean? those codes are for lean engine condition look for vac leaks at the back of engine to the pcv valve could ...
...small leak in the exhaust, usually at the outlet to the engine converter. This leak will allow air to be pulled into the exhaust and cause a false lean concern at the post O2 sensor. To diagnose this ...
...side of the catylatic converteron the exhaust. The go into the exhaust and will kind of look like a spark plug that will have a small wire harness coming off the ends. They just unscrew and
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