In my own personal experience, when a code P is stored, it means that the powertrain control module PCM has detected a problem with automatic transmission shifting. This code P0780 honda odyssey be caused by either a mechanical or an electronic malfunction but is limited to vehicles with automatic transmissions. Input als from an array of engine and transmission sensors are used by the transmission controller to calculate transmission shift strategy.
Electronic solenoid valves are then activated by the controller, allowing high pressure fluid to flow into the appropriate hydraulic circuit in the valve body and permit the transmission to up or down shift as required. A powerful pump integrated into the transmission housing and driven by the engine is used to create the hydraulic pressure needed to accomplish smooth and efficient shifting functions.
Cost of diagnosing the diagnostic code
Since varying degrees of hydraulic pressure are required at different RPM levels and engine lo, the transmission controller regulates pressure via an electronic pressure regulator. The transmission pressure sensor and the transmission temperature sensor help the controller to monitor hydraulic pressure and make the necessary adjustments. The transmission controller is programmed to compare input als from the input speed sensor and output speed sensor to determine whether the transmission is shifting efficiently.
If the PCM detects that the transmission is not shifting properly, a P code will be stored and a malfunction indicator lamp MIL may be illuminated. On some models, this type of code will require multiple drive cycles in order for the MIL to be illuminated.
P shift malfunction
In this case, the code may initially be exhibited as a pending code. A P transmission shift malfunction code should be addressed as urgent. A minor condition could morph into a catastrophic one if left unattended for an extended period of time.
A careful visual inspection of the transmission and all related wiring harnesses is the best place to begin your diagnosis of this code. Pay particular attention to wiring that is routed near hot exhaust components and sharp edges. Keep in mind that a portion of the transmission control harness is located inside the transmission case.
P shift malfunction code
You may choose to wait and see if you must enter the transmission housing for other purposes P0780 honda odyssey inspect this part of the harness. Interior transmission harnesses are prone to failure because of the harsh temperatures and sharp edges found inside of the automatic transmission. Connect the scanner to the vehicle diagnostic connector and retrieve the stored codes. Write the codes down along with any related freeze frame data and then clear them from the PCM memory.
P honda - shift control system fault
Since this code may be caused by either an electronic or mechanical malfunction, you will also want to inspect the transmission, transmission cooler, and transmission cooling lines for s of leakage. If the transmission is low on fluid, it will cause the transmission to slip, fail to shift properly, and experience delayed engagement.
Either of these conditions may contribute to this code being stored. If the transmission is slipping and there is delayed engagement with the fluid level normalremove the dipstick if applicable and see if P0780 honda odyssey fluid smells and looks burnt. If the fluid appears to be burnt, suspect mechanical transmission failure that will require a rebuild, with a new torque converter and cooler.
If the transmission fluid is ificantly low more than 2-quartsyou will need to locate the leak and repair it, Refill the transmission with the recommended fluid and test drive the vehicle to see if the problem persists and the code is reset. If the code is reset, use the transmission pressure gauge to check pump pressure.
How is the p honda code repair?
If the pump has been operated without enough fluid, it could have been damaged creating a low pressure condition that will also require a transmission overhaul. If symptoms are limited to failed shift function, suspect a defective wiring harness or shift solenoid. If you still need help regarding the P trouble code, please post your question in our FREE car repair forums.
NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle.
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