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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0638:00Throttle valve actuator control range/performance problem (one drive cycle DTC)P0638POWER MANAGEMENTManufacturer communications
16Original wording in English
MAZDA
Reported code forms P0638:00
After parking the vehicle in temperatures below freezing, some customers may experience a lack of power with the check engine light on and DTCs P0638:00 and/or P2112:00 stored in memory. - P0638:00: Throttle valve…
MAZDA
Reported code forms P0638:00
After parking the vehicle at temperatures below the freezing, some customers may experience a lack of power with the check engine light on and DTC P0638:00 and/or P2112:00 stored in memory. - P0638:00: Throttle valve…
MAZDA
Reported code forms P0638:00
After parking the vehicle at temperatures below the freezing, some customers may experience a lack of power with the check engine light on and DTC P0638:00 and/or P2112:00 stored in memory. - P0638:00: Throttle valve…
HYUNDAI
Reported code forms P0638
HYUNDAI: SANTE FE 2010-2012; ECM SOFTWARE IS REQUIRED FOR 3.5L SANTE FE VEHICLES WITH MALFUNCTION CODES DTC P0638, DTC P2106, & P2110. *LJ
KIA
Reported code forms P0638
TSB: SERVICE ACTION: ECM UPGRADE ? MIL ON WITH DTC P0638 AND ETC MOTOR CLEANING (SA153) - This bulletin provides information related to the ECM software upgrade for some 2011-2013MY Sorento 3.5L MPI vehicles, produced…
HYUNDAI
Reported code forms P0638
HYUNDAI: DTC P2135/P0638 OR COLD ENGINE RPM FLUCTUATION; TPS REPLACEMENT AND ECM UPDATE. SOME 2.7L, 3.3L OR 3.8L ENGINES IN MODELS IDENTIFIED IN THE APPLICABILITY LIST MAY EXPERIENCE ONE OR MORE OF THE CONDITIONS…
Check vehicle applicability
75A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | CTS | 2003 |
| Hyundai | AZERA | 2009 |
| Hyundai | AZERA | 2008 |
| Hyundai | AZERA | 2007 |
| Hyundai | AZERA | 2006 |
| Hyundai | ENTOURAGE | 2009 |
| Hyundai | ENTOURAGE | 2008 |
| Hyundai | ENTOURAGE | 2007 |
| Hyundai | ENTOURAGE | 2006 |
| Hyundai | GENESIS | 2010 |
| Hyundai | GENESIS | 2009 |
| Hyundai | SANTA FE | 2009 |
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.