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U0592 — Invalid Data Received From Gear Shift Control Module B

Generic OBD-II · all makesNetwork / communication

U0592 indicates that the Powertrain Control Module (PCM) has received data from the Gear Shift Control Module (GSCM) B that is outside of expected parameters or is corrupted. This communication fault prevents the PCM from accurately interpreting the transmission’s shift information.

Symptoms

What causes it — most likely first

1. Faulty Gear Shift Control Module B

Internal failure of the GSCM B (e.g., damaged circuitry or voltage regulator) prevents it from sending valid data.

2. Wiring harness damage or corrosion

Broken, frayed, or corroded wires between the PCM and GSCM B can introduce noise or loss of signal.

3. Poor connector contact

Loose, dirty, or oxidized connectors at either the PCM or GSCM B side can cause intermittent data errors.

4. Ground‑reference problem

An inadequate chassis or sensor ground can cause voltage fluctuations that corrupt the communication data.

5. PCM communication software glitch

Rarely, a corrupted PCM firmware or a rare software bug can misinterpret valid data as invalid.

How it's diagnosed

  1. Scan for additional DTCs and note any transmission‑related codes that appear alongside U0592.
  2. Inspect the wiring harness and connectors between the PCM and Gear Shift Control Module B for damage, corrosion, or loose pins.
  3. Perform a continuity and resistance check on the communication lines (CAN high/low) to verify proper electrical integrity.
  4. Use a live data tool to monitor the GSCM B output while cycling the transmission; look for missing or out‑of‑range values.
  5. If the wiring and connectors are sound, test the GSCM B voltage supply and ground circuits for proper voltage levels.
  6. As a last resort, reflash or update the PCM software; replace the PCM only if a confirmed software defect is documented.

Code facts & related codes

SystemNetwork / communication
StandardizationSAE generic — identical on every make
Related codesU0593 — Invalid Data Received From Drive MotorU0594 — Invalid Data Received From Hybridev PoU0595 — Invalid Data Received From Powertrain U0596 — Invalid Data Received From Acac ConverU0597 — Invalid Data Received From Acdc ConverU0598 — Invalid Data Received From Acdc Conver

Frequently asked

Can I simply replace the PCM to fix U0592?

In most cases the PCM is not the culprit. Replacing the PCM without first verifying the GSCM B, wiring, and grounds usually does not resolve the issue and adds unnecessary cost.

Will a bad transmission fluid cause this code?

No. While low or dirty fluid can cause shifting problems, it does not affect the digital communication between the PCM and GSCM B that triggers U0592.

Is the code intermittent or does it stay on permanently?

U0592 can be intermittent if the fault is due to a loose connector or wiring issue. Persistent illumination often points to a failed GSCM B or a severe wiring short.

Do I need a special scan tool to diagnose this code?

A scan tool capable of reading manufacturer‑specific data and live CAN bus signals is recommended, but basic OBD‑II readers can still retrieve the code and clear it after repairs.