OBD Guide
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P1D94

Transmission Control Module Internal Calibration Mistmatch

P1D94 is an OBD-II diagnostic trouble code meaning: Transmission Control Module Internal Calibration Mistmatch. Common causes: error in tcm software, firmware update failed. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Incorrect gear shifting
  • Check Engine Light Illuminates
  • Transmission transition to emergency mode
  • Reduced vehicle dynamics
  • Difficulties when shifting gears

Causes

  • Error in TCM software
  • Firmware update failed
  • Internal control module failure
  • Module power problems
  • Mechanical damage to TCM

How to Fix

  1. Check whether the TCM firmware is up to date
  2. Reflash the control module
  3. Check the integrity of the wiring harness
  4. Replace the transmission control module if necessary
  5. Check the condition of the battery and power system

Related codes

P1D95P1D93P0606

FAQ

What does the P1D94 code mean?

P1D94 is an OBD-II diagnostic trouble code that indicates: Transmission Control Module Internal Calibration Mistmatch

What causes a P1D94 error code?

The most common causes of P1D94 include: Error in TCM software; Firmware update failed; Internal control module failure; Module power problems.

How do I fix a P1D94 diagnostic trouble code?

To fix P1D94: Check whether the TCM firmware is up to date. Reflash the control module. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1D94?

Limited driving only, diagnose soon

How much does it cost to fix P1D94?

The estimated repair cost for P1D94 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat