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
6Original wording in English
FORD, MERCURY
MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P1633 AND / OR P1639 WITH NO DRIVEABILITY CONCERN PRESENT. *TT
FORD, MERCURY
MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P1633 AND / OR P1639 WITH NO DRIVEABILITY CONCERN PRESENT. *TT
FORD
SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LIGHT (MIL) AND DIAGNOSTIC TROUBLE CODE (DTC) P1633 IN MEMORY. *TT
FORD
SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LAMP ON CONCERN WITH DIAGNOSTIC TROUBLE CODE P1633. *TT
Check vehicle applicability
14A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | RAINIER ↗ | 2004 |
| Chevrolet | TRAILBLAZER ↗ | 2004 |
| Chevrolet | TRAILBLAZER ↗ | 2003 |
| Chevrolet | TRAILBLAZER ↗ | 2002 |
| Ford | ESCORT ↗ | 1999 |
| Ford | EXPLORER ↗ | 2002 |
| Ford | ZX2 (ESCORT) ↗ | 1999 |
| GMC | ENVOY ↗ | 2004 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
KAM Voltage Too Low
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.