What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
2Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P16F4
This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P16F4
This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a TCM data pull.
Check vehicle applicability
24A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | ENCLAVE | 2026 |
| Buick | ENVISION | 2026 |
| Cadillac | ESCALADE | 2026 |
| Cadillac | ESCALADE ESV | 2026 |
| Cadillac | ESCALADE ESV IQ | 2026 |
| Cadillac | ESCALADE IQ | 2026 |
| Cadillac | ESCALADE IQL | 2026 |
| Cadillac | LYRIQ | 2026 |
| Cadillac | OPTIQ | 2026 |
| Cadillac | VISTIQ | 2026 |
| Chevrolet | BLAZER EV | 2026 |
| Chevrolet | BRIGHTDROP 400 | 2026 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.