Cadillac P1625: TCM System Reset (4L30-E)

Is your scanner showing Cadillac P1625?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Cadillac P1625: TCM System Reset (4L30-E)

OVERVIEW
Severity
:
Medium
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$100-$150
Can I Still Drive?
:
Yes

What Does The Cadillac P1625 Code Mean?

Engine started; and the TCM detected an unexpected voltage condition on the TCM Power Control relay circuit (the relay is internal to the ECM) during the CCM test.

What Are The Potential Causes Of The Cadillac P1625 Code?

  • TCM power control relay control circuit is open or shorted to B+
  • TCM power control relay has failed, or the TCM has failed

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> TCM

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

GM, 2013, Service Bullettin – Prior To Any Circuit Testing.

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