Repair P0301 Misfire P0171 Lean Toyota Camry √ Fix it Angel

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1996 1997 1998 1999 2000 2001 Toyota Camry, 4 cylinders, 5S-FE, 2.2 Liter

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2000 Toyota Camry
Diagnosed #1 injector on cylinder #1 was bad. High resistance on the injector causing rough idle. Replaced it with Genuine Toyota injector.

P0301, P0302, P0303 and P0304:
Misfiring of random cylinders is detected in any particular 200 or 1000 revolutions.
For any particular 200 revolutions for engine, misfiring is detected which can cause catalyst over heating (this will cause MIL to blink)

Possible Trouble Areas:

-Open or short in engine wire
-Connector connection
-Vacuum hose connection
-Ignition system
-Injector
-Fuel pressure
-EGR system
-Manifold Absolute Pressure sensor (MAP)
-Engine Coolant Temperature sensor (ECT)
-Compression pressure
-Valve clearance
-Valve timing
-ECM (Engine Control Module)

P0171:
When air-fuel ratio feedback is stable after warming up engine, fuel trim is considerably in error on RICH side (2 trip detection logic)

Possible Trouble Areas:

-Air induction system
-Injector bad or blockage
-Manifold Absolute Pressure
-Engine coolant Temperature sensor
-Fuel pressure
-Gas leakage on exhaust
-open or short in heated oxygen sensor (bank 1 sensor 1) circuit
-Heated oxygen sensor (bank 1 sensor 1)
-ECM

Conclusion:
I replaced the fuel injector because of blockage of fuel causing a misfire, lean condition at cylinder #1. The PCV and rubber grommet was also replaced since it was never been changed. A bad PCV may cause a rough idle, hard starting and/or lean misfire (which increases emissions and wastes fuel).

The information contained in this video is for general guidance, not responsible for any errors or injuries that you have done. Samsung W200 pocket camcorder was used to do this video.

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