Question about Lincoln LS

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Code p0356? ing coil F primary/secondary circuit. where is it?

My 2003 lincoln ls gas pedal at first doesnt do anything when trying to drive. i also got codes p0174, p0171, p2197. trany is shifting sort of rough. could fixing these codes solve that issue too? it has 173k.

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  • Lincoln Master
  • 17,970 Answers

One of the coil packs have shorted. The code refers to cylinder #6. That is the front bank, right side (Drivers side) while facing the engine.

The COP (coil on plug) ignition system is what is used on most modern engines. There is an individual coil for each cylinder that is controlled by the PCM (powertrain control module). It eliminates the need for spark plug wires by putting the coil right above the sparkplug. Two wires are dedicated to each coil. One is a battery feed usually from the power distribution center. The other wire is the coil driver circuit from the PCM. The PCM grounds/ungrounds this circuit to activate or deactivate the coil. The coil driver circuit is monitored by the PCM for faults
If an open or a short is detected in the driver circuit for coil #6, a P0356 may set. Also, depending on the vehicle, the PCM may also shut down the fuel injector to the cylinder also.

Potential causes of a P0356 code include:

  • Short to voltage or ground on COP driver circuit
  • Open on COP driver circuit
  • Loose connection at coil or broken connector locks
  • Bad Coil (COP)
  • Faulty Powertrain Control Module

Is the engine misfiring presently? If not, the problem is likely intermittent. Try wiggle testing the wiring at the #6 coil and along the wiring harness to the PCM. If manipulating the wiring causes the misfire to surface, repair the wiring problem. Check for poor connection at the coil connector. Verify the harness isn't misrouted or chafing on anything. Repair as necessary
If the engine is misfiring presently, stop the engine and disconnect the #6 coil wiring connector. Then start the engine and check for a driver signal to the #6 coil. Using a scope will give you a visual pattern to observe, but since most people don't have access to one there's an easier way. Use a Voltmeter in AC Hertz scale and see if there's a Hz reading of between 5 and 20 or so that indicates the driver is working. If there is a Hertz signal, then replace the #6 ignition coil. It's likely bad. If you don't detect any frequency signal from the PCM on the ignition coil driver circuit indicating the PCM is grounding/ungrounding the circuit (or there is no visible pattern on the scope if you have one) then leave the coil disconnected and check for DC voltage on the driver circuit at the ignition coil connector. If there is any significant voltage on that wire then there is a short to voltage somewhere. Find the short and repair it.
If there is no voltage on the driver circuit, then turn the ignition off. Disconnect the PCM connector and check the continuity of the driver between the PCM and the coil. If there is no continuity repair the open or short to ground in the circuit. If continuity is present, then check for resistance between ground and the ignition coil connector. There should be infinite resistance. If there isn't, repair the short to ground in the coil driver circuit
NOTE: If the ignition coil driver signal wire is not open or shorted to voltage or ground and there is no trigger signal to the coil then suspect a faulty PCM coil driver. Also keep in mind that if the PCM driver is at fault, there may be a wiring problem that caused the PCM failure. It's a good idea to do the above check after PCM replacement to verify there won't be a repeat failure. If you find that the engine isn't misfiring, the coil is being triggered properly but P0356 is continually being reset, there is the possibility that the PCM coil monitoring system may be faulty.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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Posted on Feb 08, 2012

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Posted on Jan 02, 2017

  • 80 Answers

SOURCE: igniton coil f p0356 primary or secondary circut

Integrated ignition coil on plug

Ignition coil F is cylinder number 6 need to check or replace
Spark plug or coil,

Very rare you have to check PCM pin E39 to see if you have a short in the wire.

Posted on Sep 27, 2009

bschilz
  • 2049 Answers

SOURCE: p0171 and p0174 codes

P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)

If a car has a check engine light on and has P0171 and P0174 codes stored, the most likely cause is a vacuum leak. These codes are set by the car’s computer when it sees too much oxygen in the exhaust. Excessive oxygen readings in the exhaust will set lean codes. This does not mean that the oxygen sensors are defective. It is a common mistake for people to replace oxygen sensors when lean codes are present. Just because the code is related to oxygen sensor readings, it doesn’t mean that the oxygen sensors are bad. If both of these codes are stored this means that both banks of the engine have excessive oxygen in the exhaust. If the oxygen sensors are replaced it’s most likely that the same codes will reappear. It is very uncommon for two oxygen sensors to fail at the same time.

Therefore the most likely cause of P0171 and P0174 codes is a vacuum leak. The source of a vacuum leak can be one of many things. The most common cause of a vacuum leak is a leaky hose. Vacuum hoses over time can become dry and brittle. The rubber deteriorates and can leak causing a vacuum loss. Many times a leaky vacuum hose can be found by listening for a hissing sound. A large vacuum leak can even make the car run rough at idle. In some cases it will not idle without feathering the gas pedal.

Posted on Sep 10, 2009

SOURCE: 1999 ford taurus emission reading p0171 and p0174

just tune up ur car periodicly, clean filter. clean ur sparkplug.

Posted on Jan 16, 2009

chuck943
  • 783 Answers

SOURCE: Which cylinders would be PO352:Ignition coil

6 Cylinder Applications 1 A A 26 P0351 4 B B 52 P0352 2 C C 78 P0353 5 A A 26 P0351 3 B B 52 P0352 6 C C 78 P0353
First column is of course cylinder no., 2nd is the igntion coil, 3rd is the coil driver,4th is the PCM pin number,and last the related code.

Posted on Feb 19, 2009

  • 15 Answers

SOURCE: 4 codes P0171,P0174,P2195,P2197

Sound like this is definitly a M.A.F (mass airflow) that is at fault causing th system to run lean. if not you have some type of restriction in the intake. The P0174 & P0171 Code shows the problem is created before the O2 sensor reads the lean fuel mixture.

Posted on Oct 19, 2009

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Description of DTC:
The ignition signal from the Powertrain Control Module (PCM) or Electronic Control Module(ECM) is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.

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    Igniton coil f p0356 primary or secondary circut malfunction what does this mean


    Integrated ignition coil on plug

    Ignition coil F is cylinder number 6 need to check or replace
    Spark plug or coil,

    Very rare you have to check PCM pin E39 to see if you have a short in the wire.

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    6 Cylinder Applications 1 A A 26 P0351 4 B B 52 P0352 2 C C 78 P0353 5 A A 26 P0351 3 B B 52 P0352 6 C C 78 P0353
    First column is of course cylinder no., 2nd is the igntion coil, 3rd is the coil driver,4th is the PCM pin number,and last the related code.

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