I didn't find too much info about fixing the Engine Speed Sensor. Usually you will find oil in the connector for the crank sensor this needs to be cleaned out or the sensor will not read correctly. I do not remember if there was oil on the sensor, but this makes sense and I know I didn't clean out the hole. You did replace 2 sensors right? This information is not guaranteed to be accurate. What causes the P0725 code? If voltage is not 4. If the codes do not return, the P0725 code was likely triggered erroneously. If this does not fix the problem, then there may be an issue with the automatic transmission itself.
When you replace it with the oem sensor you want to clean out the electrical connector that connects to the sensor. If the P0725 code is still detected after being reset, then the mechanic should inspect the wires, connectors, and transmission fluid, to search for any basic and easily resolved issues that may be triggering the code. We bought the car used with 70k on it, so we don't know the total history of the car. It measures engine speed not transmission speed. A P0715 usually has one main cause and other secondary issues that are less common. This code normally points to a faulty transmission control module, but this is an expensive part and you should have an experienced Dodge technician diagnose the problem first. The last guys got the laugh! Each manufacturer has its own design criteria and terminology.
Also you will want to put the updated sensor in for the crank sensor. The code reader says engi. Open or short circuit aa2. If it is on the outside, can we see it to check the connections? If resistance is not less than 5 ohms, go to next step. Thanks so much for your help!! The aftermarket ones are the defective ones that Nissan stopped selling. Need help with a P0715 code? Whenever an issue is found and resolved, the trouble codes should be reset again to see if the P0725 code persists.
Is this easy to get to on the transmission? Allison transmissions are best identified with serial number and part number on tag which is located on right rear passengers side of transmission. The cam sensor and the crank sensor? Use the following link to share this video: Videos provided on this channel are intended for informational purposes only and cannot be held liable for any injury, damage, or problems that arise when trying to duplicate steps shown in these videos. School Bus Fleet Magazine Forums Allison 1000-2000 series info. Engine Speed Signal Circuit Probable cause aa1. Good to print and save for your records. If voltage is greater than 10 volts, repair crankshaft position sensor signal circuit for short to voltage.
How does a mechanic diagnose the P0725 code? This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Jan 10, 2011 p0731 transmission shift problems p0841 solinoid problems in the transmission p0846 fluid level p0700 solinoid stuck or sticking hard shifting there is a solinoid in the transmission that shifts the trans and downshifts when stopping this is a problem you generally don't want to do your self Mar 03, 2010. I have a P0715 code and can not get it to reset. I'm not sure if the sensor is bad or if it's the wiring. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. I made note of it so I can reference it in the future. The most common problems that result in the P0725 code are a malfunctioning engine input speed sensor, and a faulty transmission output speed sensor.
There are other types of shifters out there as well. Do it at your own risk. If resistance is less than 5 ohms, go to next step. They no longer recommend the use of Dexron fluids in any transmissions. See sample Allison tag below: We offer Free transmission diagnostic help for Allison transmissions via E-Mail:. If there are damaged wires, they will be replaced. Also is it just removing the harness from the sensor and unscrewing it, and then putting the new one on? The transmission may not shift automatically either.
Match the information from both! If you did the sensor 6 months ago with an aftermarket part it is probably bad again. Would this be the problem with the car starting poorly? What are the common causes of code P0725? Open or short circuit aa2. If resistance is not less than 5 ohms, repair open in crankshaft position sensor signal circuit. I can reset the code and it has stayed off up to 15 miles before it comes back on. . Thanks so much for your help!! The aftermarket ones are the defective ones that Nissan stopped selling.
Do you just have code P0725 questions and need some answers about Engine Speed input Circuit Malfunction? YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. RonF, I performed your sequence today and the light is now off. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Hiw difficult and costly is this repair? Beware if changing one unit from truck to truck and so on. If voltage is 10 volts or less, go to next step. It is imperative that a mechanic not only fix the faulty component, but search for greater issues that are causing the damage to the component that needs replacement.
The p0725 code is from the crank sensor. Engine Speed Signal Circuit Probable cause aa1. Usually you will find oil in the connector for the crank sensor this needs to be cleaned out or the sensor will not read correctly. We always used Key on, N R N R D N, 3 sec max between each to reset it. If this is done, the sensor is liable to fail again soon. If counter is not set to zero, go to step 8. Beware if changing one transmission from truck to truck and so on.