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What is code po354 on toyota avalon 2005

Missing on one or more cyls coil pack recently replaced on cyl1

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

greg_margo
  • 1959 Answers

SOURCE: engine misses at 35 mph code po 304 coil pack plug wire replaced

Information courtesy of http://obd-codes.com

A code P0304 may mean that one or more of the following has happened:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor (s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
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.

Hope this helps with your problem. Best of luck.
Greg

Posted on May 21, 2009

  • 1348 Answers

SOURCE: 2002 ford ranger 3.0 is missing on 2 cyl plugs ok injectors ok new coilpack

do a compression test,as the intake manifold,like alot of fords is no good.

Posted on May 22, 2009

  • 2 Answers

SOURCE: benz e420 multiple cyl missfire

also check and see if the updated Mass Air Flow sensor has been installed, these go bad all the time causing all kinds of weird misfires and other problems.

Posted on Jul 12, 2009

  • 1 Answer

SOURCE: 99 vw passat sw 1.8t #3 cyl not firing.

ihad the same problem.. its not the coils or anything like that.. and any reg mechanic wont know the prob unless they under vw.. u need to replace ur power output stage.. thats what cylinder 3 misfire is.. after i fixed it my car is good as new. i

Posted on Oct 14, 2009

  • 553 Answers

SOURCE: p134, p0141, po300, po130 and po135. 2005 Sunfire.

Given that most of the trouble codes are for the O2 sensor, I think I would change it. The multiple misfires could be because of improper fuel/air mixture caused by a bad sensor. Disconnect the negative(-) battery terminal then change the sensor. Disconnecting the negative(-) should reset the computer and allow the fuel/air mixture to return to default allowing the engine to start.
P0130 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0300 - Random/Multiple Cylinder Misfire Detected

Posted on Jun 17, 2010

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