P2982

Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance

P2982 is a generic OBD-II powertrain diagnostic trouble code: Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P2982
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P2982 means

P2982 is stored when the TCM or ECM determines that the signal from transmission fluid pressure sensor or switch D is within the electrical circuit limits but does not correspond to the expected pressure for the current operating condition, gear, or hydraulic command. Pressure sensor D monitors a specific hydraulic circuit within the automatic transmission valve body, and its reading is used to confirm that clutch packs or actuators are engaging at the correct hydraulic pressure.

A range or performance fault indicates the sensor is electrically functional but the measured pressure either does not change as expected when the transmission commands a shift or holds a value inconsistent with the mechanical state of the circuit. This can result from a worn or sticking pressure control solenoid, internal transmission hydraulic leakage past seals or check balls, or a sensor that has drifted out of calibration.

Because the TCM uses this feedback for adaptive shift control, an incorrect pressure reading can cause erratic shifts, slip during engagement, or overly firm gear changes. Diagnosis should include checking transmission fluid level and condition, performing a hydraulic pressure test if possible, and evaluating the pressure control solenoid associated with circuit D before condemning the sensor.

Common causes

Most-frequently reported root causes when P2982 is logged.

  • 1
    Worn or sticking pressure control solenoid for the D circuit causing abnormal hydraulic pressure.
  • 2
    Internal transmission hydraulic leakage past worn seals or clutch piston seals.
  • 3
    Transmission fluid that is degraded, low, or contaminated with debris affecting hydraulic pressure.
  • 4
    Pressure sensor that has drifted out of calibration while remaining electrically functional.
  • 5
    Clogged transmission hydraulic passages or filter reducing circuit pressure.
  • 6
    Failed check ball or valve in the valve body affecting circuit D pressure.
  • 7
    Incorrect transmission fluid type causing abnormal hydraulic behavior.

Symptoms drivers notice

MIL or transmission warning light illuminated.
Erratic, harsh, or delayed gear shifts.
Transmission slip during engagement, particularly in the affected gear range.
Possible transmission entering limp-home mode limiting gear selection.
Scan tool shows pressure sensor D reading not correlating with commanded shift events.

How to diagnose P2982

A typical diagnostic flow when this code is present.

  1. 1
    Connect a scan tool and record all TCM and ECM DTCs along with freeze-frame data.
  2. 2
    Check transmission fluid level and inspect the fluid condition for discoloration or a burnt odor.
  3. 3
    Monitor pressure sensor D live data across multiple shift cycles and compare to known good values.
  4. 4
    Inspect the sensor connector and wiring for any electrical faults that could cause signal offset.
  5. 5
    Perform a pressure control solenoid D functional test using the scan tool if supported.
  6. 6
    Replace the transmission fluid and filter if degraded and retest before further disassembly.
  7. 7
    Consult the transmission-specific hydraulic circuit diagram before replacing internal components.

Related powertrain codes

Frequently asked questions

Does P2982 mean the transmission needs to be rebuilt?

Not necessarily; fluid service, solenoid replacement, or sensor replacement may resolve the fault without requiring a full transmission overhaul.

What is circuit D in a transmission?

Transmission pressure sensors and switches are labeled A through D or higher to identify individual hydraulic circuits; the specific circuit monitored by D varies by transmission model.

Can low transmission fluid cause P2982?

Yes, insufficient fluid volume reduces hydraulic pressure in the affected circuit, which can cause the sensor reading to fall outside the expected range for the commanded state.

Is it safe to drive with P2982?

Short-distance driving may be possible, but continued operation with abnormal hydraulic pressure risks accelerated transmission clutch wear or damage.

Disabling P2982 in software

RaceTune can permanently disable P2982 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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