What Does P0984 Mean?
DTC P0984 indicates the TCM has detected that shift solenoid "E" is operating outside its expected performance range. The solenoid is receiving commands but not responding with the correct current draw or flow characteristics. This often presents as erratic shifting, gear slippage, or engagement delays, particularly in higher gears where solenoid "E" is active.
Common Causes
30%
Worn or mechanically degraded shift solenoid "E" with sluggish actuation
25%
Contaminated transmission fluid causing solenoid valve sticking or restricted flow
20%
Intermittent wiring fault or high-resistance connection in the solenoid circuit
15%
Valve body wear or debris restricting hydraulic flow through the solenoid channel
10%
TCM software calibration issue or degraded solenoid driver output
Diagnostic Steps
1
Check transmission fluid level and quality; perform a fluid change if the fluid is dark, contaminated, or has not been serviced within the recommended interval.
2
Measure the resistance of shift solenoid "E" and compare to the manufacturer's specification; resistance drift indicates coil degradation.
3
Use the scan tool to command solenoid "E" actuation and monitor the current draw waveform; compare the response pattern to known-good values.
4
Inspect the transmission connector and harness for intermittent contact issues by wiggling the harness while monitoring solenoid current.
5
If electrical tests are within spec, remove the valve body to inspect the solenoid "E" bore and associated check balls for debris or scoring.
Estimated Repair Cost
$200 - $1,300
Parts + labor, varies by vehicle and location
DTC P0984 indicates the TCM has detected that shift solenoid "E" is operating outside its expected performance range. The solenoid is receiving commands but not responding with the correct current draw or flow characteristics. This often presents as erratic shifting, gear slippage, or engagement del...
The most common cause of P0984 (Shift Solenoid "E" Control Circuit Range/Performance) is: Worn or mechanically degraded shift solenoid "E" with sluggish actuation
Typical repair costs for P0984 range from $200 to $1,300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Unpredictable shift quality can cause sudden RPM flares or gear engagement jolts, which may surprise the driver and momentarily affect vehicle control, especially during turns or slippery conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0984 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
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