Error Code P2749: What It Means & What To Do?

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Baffled? Don’t know how o crack the OBD-II error code P2749? Don’t you worry, Parts Avatar is here at your service! This OBD-II code transmission may not shift properly is also referred to as an intermediate shaft speed sensor "C" circuit. The intermediate shaft speed sensor performs the task of updating the transmission control module (TCM) about how fast the intermediate shaft of the transmission is spinning so that the right gear engagement can be made. At times, when the TCM receives a false signal from this sensor, further it fails to properly shift the vehicle from gear to gear as it needs to alter the rates of acceleration and speed. The error code P2749 is stored by either the TCM or the ECM.

When the powertrain control module gets an input signal from the transmission intermediate shaft sensor circuit, it stores the code P2749. Also, it should be noted that receiving such a signal is absolutely normal while the vehicle is in use. The vehicle’ operations are regulated by the powertrain control module. When the actual signal is irregular or irrational, the code is stored. This problem should be recorded. Well, all the models are designed differently with a number of ranges to accept for intermediate shaft speeds, but actually they all follow the same standard concept: its speed gradually tends to increase until a shift point is finally achieved. So, the real problem is when the transmission isn’t able to implement a correct shift strategy. This happens when it is not given an intermediate shaft speed signal that is based on accurate information.

What causes this problem with the Intermediate Shaft Speed Sensor C Circuit?

• Bad intermediate shaft speed sensor
• Electrical defects present in the wires between the speed sensor and modules
• Defective ECM or/and TCM (internal problems)
• Other related sensors/solenoids namely: input shaft speed sensor, output shaft sensor and shift solenoid etc. are damaged or defective
• Less or contaminated automatic transmission fluid (ATF) present

1. Engine Control Module - Experiencing an inconsistency in the engine response? Or a reduced fuel efficiency? Well, it could all be due to a fault in the engine control module. In addition to these, the driver is likely to observe an illuminated check engine light too. Tune into Parts Avatar now!
2. Transmission Control Module - Lack of power? Gear slippage? Difficulty to maintain an optimum fuel efficiency? We recommend you to change your transmission control module immediately if you wish to avoid the problems caused by the error code P2749.
3. Speed Sensor - Get your error code P2749 fixed immediately by simply logging into Parts Avatar and changing your damaged speed sensor. Not only this, other than the stored code, you will likely notice a whole range of problems related to the engine performance. So don’t wait, log in now!
4. Powertrain Control Module - Inconsistent engine performance, unexplained drops in the fuel economy and also problems in shifting the gears when in transmission are some common issues that follow a malfunction in the powertrain control module. Tune into Parts Avatar if you want to get rid of these problems caused by the error code P2126.
5. Automatic Transmission Fluid - Dirty automatic transmission fluid will invite problems like low of leaking fluid and whining noises. Replace your automatic transmission fluid now if you want to get rid of all these problems.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD code P2749 here:

Common Symptoms

• The driver may observe difficulty in shifting
• Illuminated instrument panel lights
• Drivability problems are likely to be experienced
• Unsteady engine speed

Here are some ways with the help of which you will be able to correct the OBD code P2749:

• Make sure you repair or replace all the faulty sensors and solenoids (i.e. input shaft speed sensor, output shaft sensor and shift solenoid etc.)
• Replacements or repairs should be performed of all the damaged wirings or connectors
• Change the contaminated automatic transmission fluid immediately. Make sure the levels are as per the requirements

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Ecm, transmission control module, speed sensor, Pcm, automatic transmission fluid, digital volt, ohmmeter, transmission fluid leak and a lot more. We are sure that now all your issues would be resolved.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

The technician is likely to start the procedure by using an OBD-II scanner to record readings from the vehicle. Once the code P2749 is seen by them, next they will proceed to check and probe the intermediate shaft speed sensor, input speed sensor and the output sensor. If all of these are functioning in order, next, the wires and connectors associated to the PCM should be inspected. Then, the shift solenoids and valve body should be checked too, if required.

Common Mistakes When Diagnosing The P2749 Code

• Here we have listed a few common mistakes that should be avoided while performing the diagnosis:
• A failed intermediate shaft speed sensor
• Jammed powertrain control module (PCM)
• A faulty transmission control module (TCM)
• Broken or corroded wiring