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P0749 is a diagnostic trouble code (DTC) for "Transmission Fluid Pressure Solenoid Intermittent". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P0749 trouble code is related to a vehicle’s automatic transmission and its fluid pressure control solenoid.
P0749 is an OBD-II generic code for a voltage problem with the transmission fluid pressure control solenoid and its signal being sent to the engine computer. The solenoid helps control transmission fluid pressure, an intermittent one may not allow the appropriate pressure for shifting.
While there could be a number of causes for a P0749, the most common are:
Intermittent issues usually point to an actual mechanical problem so chances are high a P0749 will also cause poor transmission performance such as slipping, harsh shifts and failure to shift.
Your mechanic will first ensure there is a sufficient amount of transmission fluid as well as the fluid condition. If it is low or dirty, it will need to be changed and flushed. The pressure control solenoid will then be visually inspected and tested to confirm it is faulty.
With any transmission related trouble code, dirty or low fluid could be the route cause of the problem and you should never overlook the possibility of internal damage.
A transmission may not shift properly with a faulty pressure control solenoid, which amps up the seriousness of this code.
The most common repairs for a P0749 are as follows:
Any repair that has to deal with automatic transmission fluid should also involve a change and flush of the fluid itself.
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