☰
AutoCodes.com | All About OBDII Engine Codes
Find a Shop |  Ask Auto Expert
Ask a Question

P1621 Chevrolet -

0 like 0 dislike
496 views
by

Does this mean something is going out of my truck with this code?

Vehicle: 2004 duramax 6.6lly

1 Answer

0 like 0 dislike
by (13.5k points)
P1621 ECM not programmed

Is there any chip or tuner applied to the ECM? what this code means is the ECM is not programed.

Related questions

0 like 0 dislike
1 answer 369 views
P1621 Chevrolet -Silverado 1500 4.3
asked Jan 22, 2018 by

33.7k questions

32.5k answers

1.3k comments

23.0k users

Need A Repair Shop?
Find local automotive repair shops in your area.
⚠ Check if your car have Safety Recalls

Related Information

- Car TSB
- Car Recalls
- Car Common Problems
- Car Safety Rating
- Car Technical Articles
- OBDII FAQ
- OBDII Components
- 2024 Cars MPG

All OBDII Codes

- Top 25 Codes
- Latest Codes
- All OBDII Codes
- Powertrain (P) Codes
- Network (U) Codes
- Body (B) Codes
- Chassis (C) Codes
Powered by Question2Answer
...