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P0828 is a diagnostic trouble code (DTC) for "Up and Down Switch Input Circuit High". 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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0828 code is a generic powertrain code related to the transmission, including pressure faults and sensor failures. In this case, the engine control module (ECM) has found a fault with the input circuit for the up and down switch, reading higher than allowed preset parameters.
Codes related to the P0828 include:
If the ECM detects an abnormality in the voltage or resistance signal in the Up and Down Shift Switch circuit between the switch and the transmission range correlation unit a P0828 code will be stored. The circuit includes the switch, all system wiring and connectors, as well as the mode actuators. You can locate the Up and Down Shift Switch near the shifter in the passenger compartment of the vehicle, which may be mounted on the steering wheel (such as “paddle shifters”. These switches are only used on vehicles with manually shiftable automatic transmissions (automated manuals).
Vehicles equipped with an OBD-II system use a computerized control system to use various inputs to calculate engine driveability inputs to determine the gear ration needed to achieve the best fuel efficiency, engine performance, and vehicle life.
The ECM will initiate up and down shifting through shift solenoids in order to actuate fluid transfer between the hydraulic circuits in each set of gears, allowing the driver to choose between multiple shift strategies, such as “Normal” and “Performance” modes. A manually shiftable automatic transmission will allow a driver to up or down shift quickly through the use of a shift or button near the shift lever.
Several problems may cause a P0828 code including:
Symptoms of a P0828 code may include:
A mechanic may use several methods to diagnose a P0828 trouble code, including:
Before checking and diagnosing faulty transmission wiring, be sure to check whether liquid was spilled on the shifter in the passenger compartment. Clean and repair any damaged wiring or connectors at the shift switch location and retest the system before performing more complicated repairs.
Because a vehicle’s safe driving operation may be impacted due to faults that store a P0828 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a P0828 trouble code and include:
It is recommended to first check the switch location inside the passenger compartment for spilled liquids, clean, fix any damaged wiring if necessary, and retest before moving onto further aspects of the switch circuit.
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