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Dan, Technician
Category: Chevy
Satisfied Customers: 24583
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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I got three codes P1680 PO894

Customer Question

I got three codes
Submitted: 3 months ago.
Category: Chevy
Expert:  Dan replied 3 months ago.

Hello, my name is ***** ***** I'm here to help get your problem solved.

Expert:  Dan replied 3 months ago.

1680 usually means the PCM needs to have updated programming installed. Check the VIN with TSB 04-06-04-038 for a possible Powertrain Control Module (PCM) or PCM program update, you can call dealership and see if it has been done. P0894 means transmission detected a slip, usually means the solenoid has failed but can also mean transmission is failing. Let me know if you have questions, thanks.

Customer: replied 3 months ago.
THANK YOU I feel that your answers are very helpful. Yes the transmission is slipping now on and off with high engine rpm rev before going into hear. Sometimes it goes right into gear.
Expert:  Dan replied 3 months ago.

I would start with a transmission flush and replace the torque converter solenoid, if you are having problems still then you are looking at more serious transmission problems that will require rebuild or replacement. Let me know if you have questions or run into questions, you can reply to this answer at any time even after rating without additional fees. Thanks.