What Does P0983 Mean?
DTC P0983 indicates the TCM has detected an abnormally high voltage on the shift solenoid "D" control circuit. This typically points to an open circuit where the solenoid is not connected or a short to battery voltage in the control wiring. The transmission will likely default to limp mode, locking in a single gear ratio.
Common Causes
35%
Open circuit in the wiring between the TCM and shift solenoid "D" due to a broken wire or disconnected connector
25%
Open coil winding inside shift solenoid "D" (burned out solenoid)
20%
Short to battery voltage in the solenoid control circuit wiring
15%
Corroded or backed-out terminal pins at the transmission connector preventing electrical contact
5%
TCM internal fault on the solenoid driver high-side circuit
Diagnostic Steps
1
Inspect the transmission electrical connector for backed-out pins, corrosion, or physical damage at the shift solenoid "D" terminals.
2
Measure the resistance of shift solenoid "D" at the transmission connector; an infinite reading (OL) confirms an open solenoid coil.
3
With the TCM disconnected, check continuity end-to-end on the solenoid "D" control wire to verify there are no breaks in the harness.
4
Check for shorts to B+ by measuring voltage on the solenoid control wire with the TCM disconnected; any voltage present indicates a short to power.
5
If the solenoid and wiring test within spec, suspect a TCM driver failure; verify by swapping solenoid connector pins with a known-good solenoid circuit to see if the fault follows the TCM output.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
DTC P0983 indicates the TCM has detected an abnormally high voltage on the shift solenoid "D" control circuit. This typically points to an open circuit where the solenoid is not connected or a short to battery voltage in the control wiring. The transmission will likely default to limp mode, locking ...
The most common cause of P0983 (Shift Solenoid "D" Control Circuit High) is: Open circuit in the wiring between the TCM and shift solenoid "D" due to a broken wire or disconnected connector
Typical repair costs for P0983 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of solenoid control prevents proper gear engagement, which can result in being stuck in a single gear. This significantly limits acceleration capability and can make highway driving unsafe if stuck in a low gear.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0983 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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