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Electronic control unit internal malfunction

Transmission having trouble shifting to higher gear till engine warms up

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 58 Answers

SOURCE: automatic transmission will not shift into higher gear

Probably a bad ignition switch not sending power to the IGN 0 fuse which provides power to every solenoid in the transmission.

Posted on Dec 21, 2008

  • 7 Answers

SOURCE: Transmission in limp mode?

the neutral safty switch tells the comp. what gear is in. when its not working the light wont move and the car will not go threw the gears prop. the switch is nown to go out. it is located on the tranny or down under the shifter

Posted on Jan 05, 2009

  • 13 Answers

SOURCE: 1993 mazda mx6 transmission is not slipping, but will not shift into higher gears. Will run at high RPM's and not shift up. Any suggestions on what it might be.. Mechanical, electrical, fluid change,

sounds like a shift solenoid in the trans.

Posted on May 10, 2009

csmock132
  • 4669 Answers

SOURCE: hard shifting from first gear to second after complete stop

It is in the bottom pan. In order to replace it you have to replace all the solenoids. They are all built into a solenoid pack. What does it do when it shifts to 2nd? Not at all or slips?

Posted on Jun 08, 2009

roniecon
  • 6826 Answers

SOURCE: 95 Geo Tracker - Automatic. Starts ok, but when

It needs a fluid change,and filter,in the transmission,also,add a additive called LUBEGUARD from napa auto parts,when you ask for the additive,be sure to get the one for gm,this additive keeps the valve body slick,and moving,this is the problem,your filter,and ,or,the fluid is dirty,and causing hydraulic problems,and valves to stick in the valve body in the transmission.

Posted on Mar 15, 2010

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1 Answer

My BMW 2002 starts out good in morning but when it gets warm or hot my transmission failsafe light comes on what can I do


BMW has been using electronically controlled automatic transmissions in most models since the late '80s. These transmission systems employ a transmission control unit which controls electrical solenoids to manipulate the various control and shift valves and functions in the transmission valve-body. When the transmission control unit detects a problem that it "thinks" could be damaging to the transmission or engine, it goes into a fail-safe or "limp" mode. In this mode, the transmission will function in reverse normally, but in forward it will operate in only one gear (whether you have the shifter in D, or any of the lower gears). This will typically be 3rd or 4th gear, depending on the model. It will start in this gear and stay in this gear with no shifting. You would experience this as sluggish acceleration and higher than normal engine speed at about 40-mph and above.
If you must drive the vehicle when the transmission is in the fail-safe mode, accelerate gently and keep the road speed lower than full highway speed.
Earlier models do not employ fault codes and must be diagnosed manually. Late models do employ fault codes and a diagnostic/scan machine can be used to check and read the faults to assist in diagnostics. Note that this is not your common OBD-II engine management fault code tool. This is what A BMW dealer or a properly equipped independent shop would have for full vehicle system diagnostics and coding operations.

Jun 15, 2017 | BMW Cars & Trucks

3 Answers

Dodge caravan


Both error codes you have are transmission related. P0736 is an error for reverse has wrong gear ratio. P0700 is a general transmission problem code
http://www.obd-codes.com/p0700
http://www.obd-codes.com/p0736
for more information.

Mar 22, 2015 | Dodge Caravan Cars & Trucks

3 Answers

How can I fix my 2004 Dodge Stratus w ith Fault code P0700


Dodge is quirky about voltage, and transmission(DC-PO700) shift selonoids are electronically controlled actuators and your PO622 Diagnostic Code is usually found with voltage irregularity such Wave,Ripple,or square voltage issues(indications that your about to have alternator or battery failure..I would try a new battery and have my alternator checked if codes persist. Best Wishes & Happy Motoring!

Jan 21, 2015 | 2004 Dodge Stratus

1 Answer

2002 ford Taurus tcc transaxle code I replaced it but trans is still making noise and loses gears sometimes shifts fine when it catches usually when it warm any ideas? Thanks


what trouble code you getting if you are getting code p1700 transmission system malfunction.could have internal transmission failure noise you hear could be transmission oil pump or torque converter failure, either one will cause transmission shift problems.

Feb 05, 2012 | 2002 Ford Taurus

2 Answers

Code p0734 I just replaced eng. and trans. now have this code.


Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit Tech notes Start by inspecting the transmission fluid level and condition, and change fluid if necessary. When is the code detected? P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good. P0734 NISSAN Description This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Aug 09, 2011 | 1995 Nissan Altima

1 Answer

My came with a code po734 is that a big problem?


DTC P0734 - Improper Ratio for Fourth Gear.
P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes: Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Test and check it and send us ypur comments.

May 14, 2011 | 2000 Land Rover Discovery

2 Answers

Ford trauras trouble code 732 - was told transmission code 732 was being produced, what does a code 732 say?


P0732 FORD - Incorrect Second Gear Ratio
Transmission in second gear and the ECM detected an incorrect gear ration. This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (2nd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Tech notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.


Hope helps.

Apr 26, 2011 | Ford Taurus X Cars & Trucks

1 Answer

Is there a problem with my engine


E = error. Have dealer run scan test for fault codes.

Electronic Transmission Error Indicator
The vehicle is equipped with a redundant electronic gearshift indicator. This character appears with the key in the RUN position and displays the same gear selection as shown on the selector lever floor console next to the range selector lever. If an "E" character flashes or remains on this indicates that a transmission malfunction has occurred.
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Visual Inspection Chart Mechanical Electrical
  • Shift lock actuator
  • Transmission control switch
  • SST (+/-) switches
  • Shift cable and bracket
  • Park sense switch
  • Central junction box (CJB) Fuse:
    • 204 (5A)
    • 205 (5A)
  • Damaged wiring harness
  • Loose or corroded connections
  • Powertrain control module (PCM)


Diagnostic Trouble Code Chart Five Digit DTC Component Description Condition Symptom Action P0815 SST +/- SST +/- circuit input signal failed. PCM has detected an incorrect voltage SST input. May not be able to shift in manual mode. Go To Pinpoint Test C . P1780 TCS TCS input incorrect per selected position. TCS voltage incorrect. No overdrive cancel when range selector is moved. Go To Pinpoint Test A .

Apr 24, 2009 | 2001 Lincoln LS

1 Answer

1997 jeep cherokee gears stick between 2nd and 3rd gear


If shift is delayed, it may be due to either temperature or varnish in unit. Has the oil been changed in unit at regular intervals? Low temps with even slight varnish buildup can give poor shifts, but it usually clears up as it warms up. If unit is "flairing" (engine speed increases with no shift & slight sensation of power loss ) then shifts, this can be the result of internal wear. If trans oil is very old and dirty, change oil & filter.(if there is an excessive amount of fine metal or non magnetic debris in unit, likely there is internal damage) If fluid is clean and unburned, check to see if your vehicle is equipped with an electronic shift module (have someone check codes to test). Otherwise, unless you are a technician, bring it to a reliable transmission shop.

Jan 15, 2009 | 1997 Jeep Grand Cherokee

1 Answer

At higher speed the car refuses to shift to the next gear. Cannot move faster. DTC code indicates "Transmission Ration Control Motor" What do I do?


Murano doesn't shift. It has a CVT trans. (continuesly variable transmission). no shifting involved. I think that you have an internal failure, which would mean replacement of the unit. No rebuild parts available from Nissan. Whole unit only.

Jul 15, 2008 | 2003 Nissan Murano

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