Question about Mazda MAZDA6

2 Answers

Cel and at lights on

1 to 2nd gear ****, down shift from 3 to 1 st gear. Obd scan no faulty code. Last times Po772 found.please help....thanks

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  • kentmenn Ling
    kentmenn Ling May 14, 2014

    OBD scan no fault when CEL& AT is on, can erase code but show cannot delete fault code. after a while liht still come back.

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  • 106 Answers

P0772 is indicating that shift solenoid e is stuck in the on position in both the 4 cyl and 6 cyl engine transmissions. Outside of inspecting the fluid level and condition and then doing a line pressure test of transmission pressure, the next steps involve removal of the oil pan and valve body to determine if the solenoid is faulty electrically (open or short circuit) or if the valve it controls is stuck mechanically. Not something that average owner would want to tackle I'm afraid to report.

Posted on Nov 06, 2015

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  • Expert
  • 194 Answers

Ask the dealer what the Po772 is. check your throttle position sensor.

Posted on May 09, 2014

Testimonial: "Obd scan no faulty code, can erase code but show cannot clear fault code for CEL N AT Lights."

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

MobyMech
  • 106 Answers

SOURCE: obd code p0304

Hi

P0304 is actually pointing to a misfire in cylinder 4, not a camshaft sensor problem.

There could well actually be two misfires rather than just one because Ford use a wasted spark ignition system wherein two cylinders are fired at once, one of them on its compression stroke and the other on its exhaust stroke, hence the wasted spark on the exhaust stroke.

You say it is "popping" which would lead me to believe that there is a spark issue rather than a fuel issue, because the popping sound would be the fuel igniting either in the exhaust or the intake rather than the cylinder, and this would be confirmed if you were to run the engine and then switch it off and pull the no.4 spark plug and it were to be covered in fuel.

If you were to find two plugs covered in fuel and the rest ok, then the coil pack feeding those two plugs would probably be the problem.

If only one plug were covered in fuel then either the plug or lead feeding that cylinder owuld probably be the issue.

If none of the plugs are covered in fuel, indicating a fuel problem, and you were to swap the no.4 injector with one of the other injectors, and then the fault code were to change to the cylinder into which you swapped the no.4 injector, then the injector would be the problem.

Very best regards

Geordie

Posted on Jul 15, 2008

SOURCE: CEL is ON. OBD code P2181. I already replaced the ECT.

P2181 is a overheating engine.  
Can be:
Bad fan themoswitch, temp sensor themostat water pump impeller fan motor or fuse on battery
check to see if fans work by turning on Air Conditioner (fans should run with A/C on). Turn A/C off, warm engine, check to see if fans come on, if they do NOT it may be thermo switch on radiator on lower left side, has 3 wire plug, takes 1-1/8" wrench/socket to remove.  This thermo switch controls fans when temp reaches 195F, if fans do not come on at engine temp 190-195F try  replace switch VW part number: 1J0-959--481-A  You can verify if the switch is bad by shorting wire 1 and 2 (fans should come on when jumpered).

Posted on Oct 26, 2008

  • 1 Answer

SOURCE: 2004 Dodge Stratus automatic has trouble shifting gears

I had the same problem - it was a fuse that controls the speedometer and the shifting solenoid

Posted on Feb 06, 2009

  • 1 Answer

SOURCE: Honda 2004 transmission gear box

Hi sounds like a problem I was starting to have in my 04 Accord. It would shutter terribly between gears. We had changed trans. fluid every 60k miles but evidently that wasn't good enough. I was shopping for a trans when I talked to my mechanic and he recommended new fluid. We drained and refilled trans twice and now drain and refill trans pan every other oil change ( about 20k w/ synthetic). After the fluid change trans. is doin great. Don't run and go pay for a trans flush at a local shop. I worked at a very highend dealership as a service writer and trust me it is a rip. In your honda you have drain plug just drain and refill, then run, repeat. It will do the same thing just takes a little longer. I have 190k on "The 04" now and it just won't quit! Honda's Rock!

Posted on May 02, 2009

Molson02536
  • 3854 Answers

SOURCE: 2000 blazer shifts fine 1-3 gears , wont go into

OK, let me remember..........the code 753 means the solenoid INSIDE the tranny pan is bad. You don't have 1st or 4th gear, is what I was told, however, you probably WON'T even notice. I didn't. If you are at a stop, and get on it hard, you should be able to tell. If you drive normal, like me, and just accelerate gradually, you would not be able to tell that the truck is not hitting the 1st and 4th gear. You may not recognize a problem, just the check engine light. Your going to have to drop the tranny pan, replace the solenoid, and reinstall the fluid and the pan. The hardest part is, upon dropping the pan, if you don't know what you are doing, you can damage the other solenoids, and if you don't damage any, you may still have a hard time realizing which solenoid is the right one. It would take 1hour at, plus tranny pan gasket and fluid, etc., etc., for a total of about $120. Most transmission shop charge $100 for a transmission oil and filter service. The solenoid was about $20. It is not hard to replace, just unclip the wire harness and solenoid which will be an extra 5 min to the service time.

Posted on Nov 03, 2009

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How do I find out what Code PO772 is on a 2007 Ford Fusion


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Generic OBD Error Code Details for P0798 Pressure Control Solenoid "C" Electrical What does this mean?OBD Code P0798refers to
The Engine Control Module (ECM) uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical troubles of the shift solenoid valves and valve body. SymptomsPossible sumptoms of OBD code P0798
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nor years of all parts swapped.
swaps are super complex topics, endless possibles.

dont expect magic from any TCM.
they cant tell you ever possible way things can be wrong
it will fail to shift right if things are wrong,
the trans TCM can go to limphome mode, read the service manual chapter 21 yet its free, posted here 300 times.
forget the silly engine , light (CEL) use only a scan tool one that can read all factory codes not some $20 tool.
CEL lamp is for failing smog. only. never trust it, if out.

i say bad shift solinoids.
the TCM can see late shift error.s but maybe not all.
stick in 1st is a hard failure.
all inputs to the TCM must be correct for the shift to 2nd happens.
check all inputs.
if those are then see if the TCM did shift to 2nd, but the solenoids ignored the logic inputs to the solenoids.
solenoids have many failure mods
dead. (stuck closed)
stuck open, valve open.
or leaking. (leaking can cause stuck in 1st and confuse any TCM)

leaking means breached, valve leaks where it must not. ever.

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