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Hi, I have a 1997 Porsche 993. Motronic 5.2 M07. I am getting these fault codes 1) 62 misfire emissions-relvant 2) 51 Cylinder 2 misfire emissions-relevant) 3) 54 Cylinder 5 misfire emissions-relevant) Can some one please decode these fault codes? Thank you in advance

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  • t_stop Mar 07, 2009

    I need a Porsche Expert that has the factory shop manual to decode the code numbers.

  • Anonymous Mar 18, 2014

    opel monza with bosch motronic giving a fault code 52

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Common problem on 986/996-987/997 models causing missfires on various cylinders is the insulation on the ignition coils cracks open due to the temp changes and when affected by moisture ie raining/damp weather will produce missfires. Easy to replace they are bolted directly to the camcover on top of each spark plug held on by two small allen screws.

Posted on Apr 29, 2010

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The problem detected is basically multiple misfire , the misfire emission is just a consequence of the misfire.
Misfire can be caused by many problems, concerning spark, fuel, compression, and timing .

If misfire is always on same cylinders , this should not be related any timing problem.

You can start checking the sparks plugs and replacing them, also check the air intake and replace the filter, particularly if misfire happens at cold engine condition.
Regarding the spark plugs check also the wirings to the spark plugs , this are common cause for this problem.

If servicing the spark plugs does not fix the problem, check injectors, and ruen a fuell pressure and compression test at a qualified garage.

Posted on Mar 09, 2009

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Hello, These codes are telling you that you have two cylinders missing. Cylinders 2 and 5 are misfiring. Code 62 is telling you of the misfires. You will either need a tune up or either you may have a fuel problem. Please rate my answer, Thank you.

Posted on Mar 07, 2009

  • suterman
    suterman Mar 07, 2009

    50 cylinder 1 misfire

    51 cylinder 2 misfire

    52 cylinder 3 misfire

    53 cylinder 4 misfire

    54 cylinder 5 misfire

    55 cylinder 6 misfire

    56 cylinder 7 misfire

    57 cylinder 8 misfire



    Code 62 is telling you that you have a misfire the other codes are telling you enough info was found as to which cylinders are missing.

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Most probably bad spark plugs or distributor cap.
You need to start from checking plugs, wires, distributor cap, ingnition control modul. Very first and cheap solution check the injectors by using fuel injectro cleaner.
Good Luck

Posted on Mar 07, 2009

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Misfire :-------- try checking your 02 sensors /fuel pump and filter.

for 51 cylinder misfire :---
Change the coil. Period. Very easy to remove from the vehicle if it's a 4 cyl. Follow that spark plug wire from the spark plug to the other end. What it's attached to you should replace
for 54 cylinder 5 misfire :---First you have to eliminate the most obvious problems, like spark plug and spark plug wire. If you replace those and you still have a misfire, then it's a good idea to look for a vacuum leak in the intake manifold

Posted on Mar 07, 2009

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1 Answer

P0305 and P0014 can one afect the other and how to fix


PO305 is cylinder #5 misfire.
PO014 is Camshaft position fault.
The camshaft determines which valves open and when. If the cam is out of position (called "jumped timing"), several bad things can happen. Usually an engine that has jumped time will not start or will run very roughly with little to no power if it does start.
Chances of jumped timing are low, but in a high-mileage engine, not impossible. More likely is a faulty cam position sensor or wiring. Misfiring of one or more cylinders is quite likely in this condition.
Additionally, once the cause has been corrected and the computer codes reset and cleared, you may very well get an emissions error code, as actual cylinder misfiring (even running out of gas) is notorious for causing emission control, catalytic converter and O2 sensor failures (any code between PO400-PO499).

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2003 grand marquis with misfire code p0316


The first problem you have is assuming that the ignition coil is the only thing that can cause a misfire.

Diagnostic Test Code (DTC) P0316 is a "continuous memory only" code that indicates that there is a fault causing a misfire during the first 1000 revolutions of the crankshaft immediately after engine start-up. This should be accompanied by the regular cylinder misfire monitors (Codes P0301 through P0310) unless the misfire does not continue long enough for the regular misfire monitors to determine which cylinder is misfiring.

In order to determine what is actually causing the problem, you must have access to a scan tool that can perform Key On Engine Off (KOEO) fault testing and Key On Engine Running (KOER) fault testing as well as interfacing with the onboard engine computer to read live data and perform system tests.

Please note that generic OBD code readers DO NOT have the capabilities to do what you need to diagnose this problem. You will most likely get additional DTCs that can help lead you to find the source of the problem when KOEO and KOER tests are run. Generic OBD code readers can access only continuous memory DTCs.

Possibilities/conditions/systems that can cause this code are:
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>Low fuel: less than 1/8 tank
>Stuck open EGR Valve
>Blocked EGR passages
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>Fuel injector control circuits
>Running out of fuel
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P0440 and P0302 scan code - changed plugs and wires. Changed emission purge valve. All vacuum lines appear to be OK. Fuel lines are not leaking. Good spark to cyclinder two when using spark tester. ...


Cylinder 2 Misfire Detected po302 . Evaporative Emission Control System po440 The last digit on a misfire code indicates the cylinder number. A code P0302, for example, would tell you cylinder #2 is misfiring. Chances are the misfire is due to a weak ignition coil. Did you change the pcv valve? Remember to put the o-ring on the new one or this problem will happen.

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I have a 2002 Jaguar X-type. The check engine light came on and it has been acting jumpy/shaky. I recently took it to be diagnosed and the codes I recieved back were P1314, P1316, P1111, and P0302..What do...


All fault codes can be checked out at http://www.bluejag.co.uk but here are the results for some of yours. You can ignor P1111. Looks like a faulty plug or coil pack cylinder 2

Fault Code:- P1314 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire rate catalyst damage -bank 2 NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306

Action of ECM:- ECM Default:- Maximum engine speed reduced


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Cylinder compression low Worn camshaft / broken valve spring(s) Fuel delivery pressure (low / high) Fuel injector(s) restricted / leaking Fuel injector(s) continuously open Fuel contamination Fuel injector circuit fault(s) (Injector DTCs also flagged) Spark plug failure / fouled / incorrect gap ECM to ignition coil primary circuit fault (Cylinder misfire detected DTC also flagged) Ignition coil failure
Fault Code:- P1316 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire excess emission NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306

Action of ECM:- none


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Cylinder compression low Worn camshaft / broken valve spring(s) Fuel delivery pressure (low / high) Fuel injector(s) restricted / leaking Fuel injector(s) continuously open Fuel contamination Fuel injector circuit fault(s) (Injector DTCs also flagged) Spark plug failure / fouled / incorrect gap ECM to ignition coil primary circuit fault (Cylinder misfire detected DTC also flagged) Ignition coil failure

Fault Code:-
P0302 Indicates a Power-train fault


The fault is generally due to a problem in the Ignition or Misfire area


Fault Description: Misfire detected ?€" cylinder 2

Action of ECM:- none


After clearing the DTC, complete the Misfire monitor drive cycle
Check for a reoccurrence of fault DTC.


Possible Fault:- Refer to P0300 Possible Causes

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proporsche

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I am looking for a user / service manual for my car Porsche 993 carrera 4S model 1997


You can get it from one of these sites:

TheMotorBookStore.com/Porsche

or

www.tradebit.com


sometimes you might get luck and find them cheaper on ebay or amazon.com

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