Invalid Data Received From TCM
The U0412 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From TCM. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $300 - $1,200 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Transmission shifting erratically
- Harsh or delayed shifts
- Transmission slipping
- Transmission warning light on
- Stuck in one gear
Probable Causes (Ranked by Likelihood)
- TCM internal failure Very High
- CAN bus data corruption High
- Transmission sensor feeding bad data Moderate
- TCM connector issue Low
Step-by-Step Diagnostic Procedure
-
Scan TCM for internal fault codes
-
Check transmission fluid level and condition
-
Test CAN bus data quality
-
Inspect TCM connector and wiring
Frequently Asked Questions
Can I drive with U0412?
Short distances only. Shifting may be unpredictable and could damage the transmission.
What causes U0412?
Usually TCM internal failure or corrupted data on the CAN bus.
How much does U0412 cost to fix?
Between $300 and $1,200 depending on whether it is a wiring fix or TCM replacement.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.