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What causes my Hyundai Tucson to misfire - Hyundai Cars & Trucks

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Posted on Jan 02, 2017

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martin538
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SOURCE: Hyundai Tucson

The transmission filter is inside the transmission. You have to drain out the oil and remove the transmission pan and gasket. The filter is made of metal guaze and is screwed/bolted to the underneath of the valve body.

Posted on Apr 09, 2009

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ZJLimited
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SOURCE: 2005 Hyundai Tucson 2.0L During start-up

A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

A code P0300 (or 301, 302, 303 or 304) may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

About your possible solutions, if there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.



So, your code P0170 is one that surfaces with certain makes of automobiles more than others. In writing this article I've added Mercedes-Benz-specific info since it seems that M-B (and VW) are most prone to having this P0170 surface along with misfire codes or other fuel trim codes. P0170 means there was a malfunction in the computer's control of the air:fuel ratio.

It also indicates that the fuel trims reached their limit of adding fuel while trying to compensate for a actual or perceived rich condition. When the fuel trims reach their rich correction limit, the PCM (Powertrain Control Module) sets a P0170, indicating a problem or malfunction in the fuel trims. It may also have a P0173 referring to the same malfunction but on bank two.

Potential causes include a vacuum leak, unmetered air leaks Fuel saturated engine oil Leak in turbo air charge hoses (if equipped) Possibly bad O2 sensor (If Mercedes, may require adaptation with M-Benz compatible scan tool.) Oil contamination in MAF connector or O2 sensor connectors. Also check ignition coils, cam and crank sensors, and oil sensor for leakage contributing to oil intrusion in wiring harness. Defective MAF (Mass Air Flow) sensor (especially on Mercedez-Benz and other European autos. There are a lot of problems with aftermarket MAF sensors).

If you have this code and access to a scan tool, observe the MAF sensor reading in grams/sec. The reading will be different for different automobiles, so get a good spec. I'm going to stick with what would be normal for a Mercedes (1.8L), since they have the bulk of the trouble. Expect to see at idle 3.5-5 g/s (ideally). At 2500 RPMs with no load it should be between 9 and 12 g/s. On road test, at WOT (wide open throttle) it should be 90 g/s or well above. If it's not in specs, replace it. Be careful of Ebay MAFs. Often they don't work according to OE specifications. If the MAF checks out and there is no oil intrusion at the connector, check fuel pressure and ensure that there are no leaks at the regulator internally or externally. Check all vacuum hoses and confirm none are cracked, disconnected or missing. Make sure there are no vacuum leaks at the intake manifold gaskets or tears in the air supply hose. If the engine is turbo charged, be sure the hoses are in good condition and have no leaks. Leaking turbo pressure hoses could cause a rich condition. Inspect the condition of crankcase vent hose under intake manifold and operation of check valve in the hose. (In the "What are the causes?" section) If there doesn't appear to be any problems with the fuel pressure, MAF or vacuum hoses, then inspect the O2 sensor connectors for oil intrusion. A bad O2 sensor could cause a P0170, or P0173. Repair cause of oil leak and replace oil-fouled O2 sensor.

This is location diagram...

zjlimited_487.gif

Bank 1 is always the side of the engine with cylinder #1.
Bank 2 is always the side of the engine with cylinder #2.

Bank 1 is the bank of cylinders on the firewall side.
Bank 2 is the bank of cylinders on the radiator side.

Sensor 1 is the O2 sensor before the cat.
Sensor 2 is the O2 sensor after the cat.

So the one you want is the sensor AFTER the cat on the FIREWALL side of the engine.

Hope this helps.

Posted on Jul 13, 2011

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2005 hyundia tucson


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Hello I have a huyandai Tucson 2005 Today I check with device it sayes P0403 EGR . What is this . How can I arrange that. It's important or not . Can I drive without arrange that.


P0403 - OBD-II Trouble Code - RepairPal

repairpal.com > Encyclopedia > Exhaust & Emissions
Definition of error code P0403 - Exhaust Gas Recirculation Circuit Malfunction. ... TheEGR OBD-II monitor deploys a set of test criteria that are usually run ... Problem, a Plugged or Restricted System, or a Defective Feedback Device ... Nissan ' Volkswagen ' Chrysler ' Lexus ' Mercury ' Cadillac ' Hyundai ' Buick ' Volvo ' AudiMissing: tucson ‎sayes

OBD-II Trouble Code: P0403 Exhaust Gas Recirculation ...

www.obd-codes.com/p0403
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try putting the shifter in neutral and see if the vehicle starts up . could be the shifter linkage . hope this helps you out.

Feb 26, 2014 | Hyundai Tucson Cars & Trucks

1 Answer

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P0171 means the vehicle computer is showing the air fuel mixture is lean. There are many things that can cause this code but you can try DIY first.
watch this video and you will know how to do exactly
http://www.youtube.com/watch?v=bFxmoyO3OZg

good luck

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1 Answer

Hyundai tucson 'airbag' & 'check' indicators always on


You will have to get it scanned to find out the cause. Advance Auto parts, or Auto Zone will scan for free and tell you whats going on. Good luck.

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1 Answer

P0300 engine trouble code for 2005 Hyundai Tucson.


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1 Answer

Misfires on low revs and slow running


Have you had a diagnostic check? This sounds more like a timing issue, I would have the plugs, plug wires and coils checked first before I get into the injectors.

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1 Answer

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Did you forget to tighten the gas cap correctly? This has caused many many lights to come on. If not, then drive it till you can get it to the dealer.

Jun 05, 2009 | 2009 Hyundai Tucson

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