Question about 2001 Mercury Sable

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Error code on 2001 sable P0304 and P0430

I replaced the wires, plugs and coil pack and about 60 miles later the engine light came on. I took it to Autozone and the codes are P0430 and P0304. It is a
2001 Sable w/24v

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  • Anonymous Mar 19, 2009

    A ! w/a circle around it flashed today while I was driving, I have no idea what that means...



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Replace the Oxygen sensor

Posted on Feb 24, 2009


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2001 buick century P0304 step on gas engine light starts flashing

P0304 is engine misfire #4 cylinder Several things can cause a misfire #1 electrical which you have covered #2 Mechanical Test engine compression is should be around 150 cranking and 120 running . internal valve train components can cause bad compression and the valves then self. #3 fuel injector can be the cause suggest swapping with a know good cylinder and see if misfire follows injector.

Aug 19, 2014 | 2001 Buick Century

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2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack

Error Code: P0303
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 | 2008 Cadillac Cts

1 Answer

We have code p0304 on our 2001 chrysler voyager(with 220,000 miles) it runs rough and runs worse when ac is on. we tried to change spark plugs, gas cap and air filter. The check engine light was then...

P0304 Cylinder 4 Misfire Detected,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
  • 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).. I would suggest spark plugs, spark plug wiresmag-glass_10x10.gif, 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.

May 31, 2011 | Chrysler Voyager Cars & Trucks

1 Answer

1998 4runner v6. Last year I replaced #1 fuel injector, new plugs & wires. Now I am getting check engine light. Autozone read codes as follows: P0300, P0301, P0303, and P0304. I cleaned the...

The MAF sensor is not the problem, these are cylinder misfires on #1,3 and 4. replace the #4 coil pack, #1 AND 4 use the same coil, replace the spark plugs and the wires.

Aug 24, 2017 | 1998 Toyota 4Runner

1 Answer

Engine light on, idles rough. had engine light diagnosis.replaced

See if you can get the codes. If it is still number 4 only (probably a P0304) it could be the fuel flow through injector 4. Try some Techron cleaner and make sure number 4 plug isn't fouled. Also get the compression checked on number 4.

If not, it could be the ignition control module assuming all other changes have been made. If you get a code it will help. A P0300 would point toward the ICM. If it is number 4 only it could still be the ICM. Expect around $150 for the module if you do it yourself. The ICM may be under the coil pack. If you are getting a P1361 and/or P1362 it could be the Cam position sensor. They are around $40 and are usually near the number one cylinder. Mine is hiding under the water pump pulley. It is a Buick with the 3.8 engine but the principal is the same.

Mar 14, 2010 | 2001 Mercury Sable

2 Answers

Engine light just came on took to auto zone they gave me this code PO304 Trying to see what it is

A P0304 OBD2 code is "cylinder #4 misfire detected". The first place to start is your spark plugs. 1. Check condition and for wear. 2. check the spark plug wires or coil packs(depending on which you have).

Feb 27, 2010 | 2005 Jeep Liberty

2 Answers

Misfire Code/Check Engine Light. Many Repairs,Cant Clear the code

My guess on this is gonna be a cracked ignition coil. Have it tested by someone. It is very common for these coils to crack and cause a misfire.

Feb 24, 2010 | 2001 Dodge Caravan

2 Answers

Rough idle p0304 code. Light steady then flashes. many part repla

I also have the same problem with my 2002 caravan 3.3L. Misfire on cylinder #5 (P0305). Replaced ignition plugs & wires, intake manifold gasket, plenum gasket, fuel filter, air filter, cleaned fuel injectors, swapped fuel injector #5 to #1. After all these, I have no more DTC code but the symptom of misfire is still there, the idle is rough and I can feel the misfire even if I step on the gas when in park or neutral. Please let me know what to do next. Thanks!

Feb 06, 2010 | 2001 Dodge Caravan

2 Answers

Check Engine light. Misfire Cylinder 4. Keeps coming back

it sounds like an intake vacuum leak to me. check with propane or acetylene

Nov 07, 2009 | 2001 Dodge Caravan

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