Reference meaning
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.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer communications
18Original wording in English
CHEVROLET, GMC
THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLE THAT AFTER A TRANSMISSION OR TORQUE CONVERTER REPLACEMENT THE VEHICLE MAY HAVE A HARSH 1-2 UPSHIFT AND THE CHECK ENGINE LIGHT OR SERVICE ENGINE SOON INDICATOR IS ILLUMINATED. IF YOU HAVE DUPLICATED THE CUSTOMER’S CONCERN AND FOUND DIA…
CHEVROLET, GMC
This Preliminary Information communication provides information to the technician about vehicle that after a transmission or torque converter replacement the vehicle may have a harsh 1-2 upshift and the Check Engine Light or Service Engine Soon indicator is illuminated. If you have duplicated the customer?s concern and found Dia…
ISUZU
DIAGNOSTIC INFORMATION ON DIAGNOSTIC TROUBLE CODE P0894 AND P1870. *TT
CHEVROLET, GMC, OLDSMOBILE
TRANSMISSION SLIPPING OR TORQUE CONVERTER CLUTCH (TCC) INOPERATIVE WITH NO SERVICE ENGINE SOON (SES) LIGHT DISPLAYED AND NO DIAGNOSTIC TROUBLE CODE (DTC) P1870. *TT UPDATE. *TT
Check vehicle applicability
218A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | BUICK ↗ | 2002 |
| Buick | BUICK ↗ | 2001 |
| Buick | BUICK ↗ | 2000 |
| Buick | ROADMASTER ↗ | 1996 |
| Cadillac | CADILLAC ↗ | 2002 |
| Cadillac | CADILLAC ↗ | 2001 |
| Cadillac | CADILLAC ↗ | 2000 |
| Cadillac | ESCALADE ↗ | 2000 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Transmission Component Slipping/ Transmission Mechanical Transfer Case 4×4 Switch Circuit Failure
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.