Question about 1998 Honda Civic

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Po300 po302 po304 p1399

Check engine light on lose of power shakes only when on driveor reverse

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The number 2 and number 4 cylinders are misfiring.I would do a tune-up on it sparkplugs, plug wires, air filter and fuel filter.

Posted on Oct 29, 2012

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Posted on Jan 02, 2017

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I have check engine code P1354 variable valve timing system bank 2 for my 2000 Lexus RX300. Where is this located?


YES, you have to investigate what is throwing your valve timing off. That could be anything from a vacuum leak to clogged injectors, bad plugs, sensor ect. Have the car analyzed to find the cause. There can be many causes. Good luck

Mar 22, 2017 | 2000 Lexus RX 300

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What does the codes on a volkswagen beatle turbo mean codes are po300 po302 po1296 po411 po304


P0300 random misfire, p0302 cylinder 2 misfire, p0304 cylinder 4 misfire, p0411 secondary air injection system incorrect flow detected, p1296 cooling system malfunction

Apr 15, 2015 | Volkswagen Beetle Cars & Trucks

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2003 acura tl error codes po301 po302 po304 po306 p1399 po300


PO300 and P1399 are random cylinder misfire detected.
PO301 cylinder 1 misfire
PO302 cylinder 2 misfire
PO304 cylinder 4 misfire
PO306 cylinder 6 misfire
I would say that you have damage to the ignition wiring harness or you ECM is failing.

Feb 17, 2015 | Acura Cars & Trucks

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99 ACURA CL 3.0 FAILED PO302 MISFIRE PO303, PO304, PO305, PO306, & PO300 RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED


If a tune up (spark plugs, ignition wires, distributor cap/rotor button or coil packs) don't work, try checking the fuel system.

Nov 05, 2013 | Cars & Trucks

1 Answer

2006 ford freestar po304


Code 300 is a random miss not serious enough to peg a cylinder, code 302 is for cylinder 2 and code 304 is cylinder 4. Code 402 is for an EGR flow problem.
Its possible the EGR problem is causing the missfires. The computer sets the 300 codes when RPM drops on a cylinder. The computer does not know why. So it could be spark, fuel, compression, or a vac leak.

Jun 28, 2013 | Cars & Trucks

1 Answer

2000 Lexus GS300 I have codes po300 po302, po303, po304, po305, po306,po171


We can't help you here

You need the car diagnosed

I doubt you have lifters,should have
OHC valve train

Most likely the oil passages are clogged up
in the cams with sludge

That's what happens when the wrong oil
& too long between changes takes place

You ruin the engine

Dec 23, 2012 | Cars & Trucks

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Hello i have a GTI its a 2.0L manual transmission, i have been having problem after problem thus far. Current engine codes PO422, PO300,PO304,PO303,PO302. I do not have a code list to see what these are...


I think that PO422 is the Cat Converter, it may be bad or may be just the O2 sensor.
The PO300, 302, 303, 304 code have to do with the ignition coils or wires. (302, 303, 304 means there are ignition /firing problems in cylinders 2, 3and 4). If your lucky just the wire and new spark plugs.
Google "engine codes Jetta" for more on web. Good luck.

Feb 06, 2011 | Volkswagen GTI Cars & Trucks

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I have a 318i 1998, the engine light came on. i hook up my obd scaner to it and the trouble codes are as follows p1174 (fuel trim adaptation additive bank 1 malfunction,po300 (random/multiple cyl. misfire...


Sounds like it may be running a bit lean - do basic checks for air leaks in the induction system (such as leaking manifold gasket, loose hose fittings to air flow sensor etc).
Condition of HT leads also worth a check.

Jun 07, 2009 | 1999 BMW 318 ti

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