In addition, be sure to check for any clogged internal fluid passages, as this can certainly cause P0758 related issues. It’s not too out of the ordinary for the wiring to be faulty or going bad. One of the most common things to consider when diagnosing a P0758 code is the wiring. This will ensure you get accurate results with the test, and will prevent further damage. P0755 Hyundai Code - Shift Control Solenoid Valve 'B'. Gears will then be shifted to the optimum position. When diagnosing a P0758 solenoid related DTC, it’s important to follow your vehicle manufacturer’s solenoid testing procedure. Shift solenoid valve B is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module ( ECM) (throttle opening). A logged P0755 code means that the powertrain control module has detected that shift solenoid B is malfunctioning. Common P058 Codes Diagnostic Considerations If there are no obvious issues have been found after these checks, then the problem could be caused by the transmission pump, valve body, or pressure regulator. This needs to be done based on your vehicle manufacturer’s recommended procedure. If everything checks out, your next step needs to be testing the shift solenoid. The first thing to look at in regards to the wiring is potential damage and / or corrosion inside the plug(s). If there is no sign of lack of maintenance, and the transmission fluid looks clean and red, then your internal transmission wiring and / or connectors should be checked. ![]() If the fluid is dirty as mentioned before, and there is a reduction in pressure due to any suspected blocks, then a full transmission service and flush may need to be done in order to remedy the situation. This is a common sign that there is more than likely an internal component or “hard part” failure.īecause the transmission fluid provides you with a lot of information on it’s own in regards to the transmission’s “health”, checking the ATF levels and condition needs to be the first thing you do when diagnosing a transmission solenoid fault code. Something else to look for is any metal shavings in the fluid. If the transmission fluid contains any dirt, sludge or metallic debris, the shift solenoids typically won’t work as they should, causing issues. If your experiencing any of the common P0758 DTC symptoms, one of the first places to look at is the transmission fluid.
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