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I have a 2005 jetta 2.5 i have found thus code p0734 what to do cause i have problem up shufting & dwn shifting from 4th guear dwn

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SOURCE: P0734 Gear 4 Incorrect ratio

USUALLY WHEN ITS AN INCORRECT GEAR RATIO ITS USAULLY A INPUT SESOR AND IF THAT DOESNT FIX IT THEN TRANNY

Posted on Oct 07, 2009

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On a 2001 Chrysler 300 what does p0 734 and mean and how do you fix them


Code P0734 more or less means transmission is slipping in 4th.
  • Defective 4th gear related shift solenoid
  • Defective 4th gear related gear set or clutch pack
  • Defective Engine Coolant Temperature Sensor
  • Defective Valve Body
  • Dirty transmission fluid that restricts the hydraulic passages
Check the attached links,
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

P0734 OBD II Trouble Code


http://www.datsc.com/tabid/122/OBD-Error-Code/P0734/Diagnostics/chrysler/Default.aspx
P0731 Gear 1 Incorrect Ratio
Transmission code P0733 without P0715

Mar 09, 2016 | Chrysler Cars & Trucks

1 Answer

How do replace a speed sensor on an 1996 infinty I-30 ?


1996,

ok cars have 2 to 5 speed sensors.

so saying that means nothing.

but 734 does, first post ever with speed and code in one.

usually its not.

1996 what , kia? or Infiniti? perplexed i am.

734

that is tranny, code, so why condemn the sensor

i do take it off and clean the black magnetic crap on the end every time. do so , often. and win.

Trouble Code Conditions:

NOTE: If DTC U1000 is displayed with this DTC, first perform the trouble diagnosis for DTC U1000. Diagnostic trouble code P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good.

Possible Causes:



  • Shift solenoid valve A (On stick.)


  • Shift solenoid valve B (On stick.)


  • Shift solenoid valve C (On stick.)


  • Pressure control solenoid valve A (On stick.)


  • Forward and direct clutch assembly


  • U/D clutch


  • U/D brake


  • 2nd coast brake


  • One-way clutch No.1


  • Hydraulic control circuit


(so the FSM then has you conduct many tests to find true cause.)_



A/T are very very complex animals.



did you connect a scan tool that can SEE ALL factory DTC codes>

if not , you are blind..

cheap readers dont do that. they blind you.



the TCM can tell that 4th is not attained

by seeing the VSS speed too slow, that means the tranny is slipping

or is not in 4th gear, or the VSS fibbing its buns off (clean it , reset code, and drive)

Jun 24, 2014 | 2003 Kia Spectra

1 Answer

My 2000 hyundai elantra is automatic it has a code p0734. which the mechanic explained me that i have to get the speen sensor replace and get new clutch because the 4 gear ratio is bad. pls advice what 2...


P0734=A/T 4th gear incorrect ratio. This has nothing to do with the speed sensor. If the speed sensor was faulty, it would also set OTHER gear incorrect ratio codes. My experience tells me the 4th gear incorrect ration indicates the torque converter clutch (TCC) is slipping and nothing more. Unless there was a speed sensor DTC (Diagnostic Trouble Code), the sensor is not the issue (yet). The fact P0734 was set (trust the computer), the TCC is slipping (out of range). Question: Maintenance history may indicate the wrong transmission fluid may have been introduced. Hyundai's Transmission fluid is strictly SPIII... there is no substitute. The incorrect fluid will cause 4th gear slippage. Now, having said that, it doesn't mean the 4th gear (lock-up) clutch isn't worn out. Have a qualified/certified Hyundai Service Technician properly diagnose this issue.

Sep 08, 2011 | 2000 Hyundai Elantra

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 2000 Sephia will only shift gears manually from 1,2, then to drive. I get a code PO734. How do I fix and or slove this problem?


This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)


Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.
Possible Causes:
  • Customer may complain of intermittent 4th gear operation
  • O/D and 2/4 pressures less than 75 psi
  • O/D or 2/4 clutch volume indexes out of specification
  • O/D accumulator seals are damaged
  • Transmission enters "limp in" mode running in 4th gear

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).
Possible Causes:
  • Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  • Transmission has internal problems or damage present
You have a transmission problem.Hope this helps, James Booth

May 17, 2011 | Kia Sephia Cars & Trucks

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

Code po734, po735


This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)


Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.

Possible Causes:

  • Customer may complain of intermittent 4th gear operation
  • O/D and 2/4 pressures less than 75 psi
  • O/D or 2/4 clutch volume indexes out of specification
  • O/D accumulator seals are damaged
  • Transmission enters "limp in" mode running in 4th gear

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).

Possible Causes:

  • Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  • Transmission has internal problems or damage present
You have a transmission problem.

Jan 17, 2011 | 2003 Dodge Durango

2 Answers

P0734


Description of fault code P0734:

This code is set if the value of input shaft speed is not equal to the value of the output shaft, when multiplied by the 4th gear ratio, while the transaxle is engaged in 4th gear. This malfunction is mainly caused by mechanical troubles such as control valve sticking or solenoid valve malfuctioning rather than an electrical issue.

From experience (sorry) you will end up replacing the transmission. This code usually indicates an internal mechanical failure.

Dec 28, 2010 | 2003 Hyundai Accent

1 Answer

First problem P0734, then some internal failure, now 3rd tranny


Take it back to the dealer and have them test the TPS. The PCM takes information from the TPS to control the transmission fluid pressure that controls the firmness of the shifts and the amount of fluid pressure to hole the gears in place. The reading from the TPS should be smooth and constant. it the TPS passed then it's a good chance that your looking at another transmission. P0734 mean's the 4th gears are slipping. Good luck and hope this helps. Keep me posted, be glad to help.

Jun 16, 2009 | 2002 Hyundai Accent

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