|Code||Fault Location||Probable Cause|
|P2822|| Pressure Control Solenoid "J" Electrical |
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What Does Code P2822 Mean?
SPECIAL NOTES: OBD II rules dictate that car manufacturers label the components that make automatic transmissions work in the same way, and in this case, the pressure solenoids in all automatic transmissions are labeled with letters such as “J”, “K”, “L”, and others, depending on the number of pressure solenoids a given transmission contains.
However, in practice, the OBD II rules do not dictate that all pressure solenoids in all automatic transmissions that are labeled with say, the letter “J” perform the same function, provided the solenoid labeled “J” is involved in measuring and/or monitoring the hydraulic pressure in a circuit that manages gearshifts. For instance, the pressure solenoid labeled “J” in Toyota’s advanced hybrid CVT (Continuously Variable Transmission) monitors the pressure that controls the primary pulley in the belt-drive section of the transmission.
In conventional automatic transmissions offered by other manufacturers, the pressure solenoid labeled “J” might control the pressure of the clutches between first and second gear, or the pressure in the clutches between sixth and seventh gear. Therefore, the positions of pressure solenoids labeled “J” vary between different automatic transmissions, and therefore, great care must be taken during the diagnostic phase of resolving this code on any automatic transmission to identify the correct solenoid. END OF SPECIAL NOTES.
OBD II fault code P2822 is a generic trouble code that is defined as, P2822 – “Pressure Control Solenoid “J” Electrical”, and is set when the PCM (Powertrain Control Module) detects an electrical failure of or malfunction in the automatic transmission’s pressure solenoid labeled “J”.
In simple terms, gearshifts on automatic transmissions are accomplished when the PCM or TCM (Transmission Control Module) energizes solenoids that direct hydraulic pressure out of one hydraulic circuit, and into another circuit. This action deselects the current gear ratio and selects the next higher or lower gear ratio.
We need not delve into the complexities of transmission control systems here, beyond saying that for this system to work, sufficient overall hydraulic pressure must always be present in the transmission. This is to ensure that when a particular gear ratio is selected, the clutches and planetary gear sets can be activated and pressurized continuously for as long as any given gear ratio is in operation.
Thus, assuming that the transmission’s pressure pump is working as designed and that all speed-sensing sensors are reporting accurate data to the PCM/TCM, the controlling module will monitor the hydraulic pressure in all circuits. If then, the control system needs to perform a gearshift, the solenoid (in this case, solenoid “J”) that has to direct fluid into the requisite circuit will be energized by the PCM/TCM to initiate the gearshift. If the hydraulic pressure in this circuit is within specifications, the gearshift will be completed. However, if the pressure is not sufficient, or if the PCM/TCM detects a failure of the solenoid, the PCM/TCM will abort the gearshift to prevent damage from occurring to the transmission’s moving/rotating parts.
In these situations, the PCM/TCM will recognize that it/they cannot control the transmission effectively or safely, and it will set trouble code P2822 as a result. Note that, depending on the application, the PCM/TCM might also illuminate a warning light and/or initiate a fail-safe or limp mode to limit or prevent damage to the transmission.
Where is the P2822 sensor located?
This image shows the valve body from the automatic transmission in a Nissan Pathfinder model. Note that this component is located inside the transmission casing, and it contains all the solenoids, shuttle valves, check valves, and other moving parts that control the flow of fluid in the main body of the transmission.
In this example, the vertical cylinders collectively circled are the solenoids that make this transmission work. However, by appearances alone, it is impossible to identify solenoid “J” definitively without reference to reliable service information. The only way to identify solenoid “J” correctly on any automatic or CVT transmission is to compare the valve body with service information that is linked to the affected vehicle’s VIN since car manufacturers sometimes modify or change the design and/or layout of transmissions midway through a production run.
What are the common causes of code P2822?
Note that while there are many possible reasons for solenoid “J” to fail, this code expressly refers to an electrical fault, which has relatively few causes, but which typically relate to-
- Burnt, damaged, shorted, disconnected, and/or corroded wiring and connectors both inside and outside the transmission
- Defective or malfunctioning pressure solenoid “J”
- Abnormal system voltages
- Defective of corrupted control software
- Failed or failing PCM or TCM, but note that this is an exceedingly rare event
NOTE: This code can be particularly challenging to diagnose and resolve since the fault involves a cause that the control/diagnostic system cannot identify. To illustrate this point, we have listed here the other electrical failures and/or malfunctions on solenoids labeled “J”, the causes of which can be identified by the control/diagnostic system- –
- P281F – “Pressure Control Solenoid “J”
- P2820 – “Pressure Control Solenoid “J” Performance/Stuck Off
- P2821 – “Pressure Control Solenoid “J” Stuck On
- P2823 – “Pressure Control Solenoid “J” Intermittent
- P2824 – “Pressure Control Solenoid “J” Control Circuit/Open
- P2825 – “Pressure Control Solenoid “J” Control Circuit Range/Performance
- P2826 – “Pressure Control Solenoid “J” Control Circuit Low
- P2827 – “Pressure Control Solenoid “J” Control Circuit High
WARNING: Based on the above, we do not recommend that non-professionals engage in any diagnostic and/or repair attempt related to this, or any other pressure solenoid-related faults on any automatic transmission.
What are the symptoms of code P2822?
Common symptoms of code P2822 are largely similar across all applications, and could include one or more of the following-
- Stored trouble code and illuminated warning light
- Depending on the application, multiple additional transmission-related fault codes might be present
- Gearshifts may be harsh, erratic, or unpredictable
- The transmission may not select some or all gear ratios
- The transmission may be locked into the next higher or lower gear ratio
- Depending on the application, the PCM/TCM may enforce a fail-safe or limp mode that will persist until the fault is found and corrected
Note that if the PCM/TCM does not initiate and enforce a fail-safe or limp mode serious, or even fatal damage to the transmission may already have occurred.