PowertrainP0638
SeriousSeverity: Serious - have it checked soon
Throttle Actuator Control Range/Performance (Bank 1)
Key terms: Control module: a small computer that runs one part of the car · Bank 1: the side of the engine containing cylinder 1 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine computer or one of its output circuits has a fault.
2Common causes
- Engine control module fault
- Power or ground connection problem
- Low battery or charging voltage
- Wiring short or open circuit
- Software or memory fault
3Can I drive?
If the engine runs normally, drive carefully to a workshop for diagnosis. If it runs badly, stalls, or will not restart, have the car towed.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 36
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0638 | Activate Brand | Powertrain |
| BAIC Motor | P0638 | Throttle Actuator Control Range/Performance Bank 1 Brand | Powertrain |
| Mercedes-Benz | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| BMW | P0638 | Throttle Actuator Control Range/Performance (Bank 1) Brand | Powertrain |
| BYD | P0638 | TAC range Brand | Powertrain |
| Chery | P0638 | TAC range Brand | Powertrain |
| Daewoo | P0638 | Electronic Throttle Control Malfunction Brand | Powertrain |
| DFFS | P0638 | Electronic throttle position adjustment failure Brand | Powertrain |
| DFFX | P0638 | TAC range Brand | Powertrain |
| DFXK | P0638 | Throttle Actuator Control Range/Performance Bank 1 Brand | Powertrain |
| EOBD | P0638 | Rozsah/výkon ovládania klapky bank 1 Brand | Powertrain |
| Ford | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Geely | P0638 | TAC range Brand | Powertrain |
| GM | P0638 | Throttle Actuator Control Range/Performance Bank 1 Brand | Powertrain |
| Great Wall | P0638 | TAC range Brand | Powertrain |
| Hafei | P0638 | TAC range Brand | Powertrain |
| Holden | P0638 | Intake Air Flow Valve Stuck Open Brand | Powertrain |
| Honda | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Hyundai | P0638 | Perform this function when DTC - Throttle actuator control range/Performance occurs Brand | Powertrain |
| Isuzu | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Land Rover | P0638 | Throttle actuator control range/performance Bank 1 Brand | Powertrain |
| Maserati | P0638 | Electronic Throttle Control Performance - Bank 1 Brand | Powertrain |
| Mazda | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Mitsubishi | P0638 | TAC motor range Brand | Powertrain |
| Opel | P0638 | Throttle Actuator Control Range/Performance Bank 1 Brand | Powertrain |
| Peugeot | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Porsche | P0638 | C wird der Fehlercode eingetragen. Der Fehler kann anschließ Brand | Powertrain |
| Proton | P0638 | TAC motor range Brand | Powertrain |
| Saab | P0638 | Befehl Drosselklappenansteller Leistungsvermögen Brand | Powertrain |
| MG (SAIC) | P0638 | Throttle Actuator Control Range/Performance Brand | Powertrain |
| Smart | P0638 | Throttle Actuator Control Range/Performance (Bank 1) SAE | Powertrain |
| Subaru | P0638 | Throttle Control Circuit Range/Performance Problem Brand | Powertrain |
| Suzuki | P0638 | Throttle Actuator Control Range / Performance (Bank1) Brand | Powertrain |
| Tata | P0638 | Throttle Control Performance Brand | Powertrain |
| Toyota | P0638 | Electronic throttle position adjustment failure Brand | Powertrain |
| Volkswagen | P0638 | Throttle body actuator bank 1 (J338): implausible signal; Upper limit exceeded Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 7
These 7-character codes are manufacturer-specific variants of P0638 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P063800 | Der Ausgang für Drosselklappensteller (Zylinderreihe 1) hat Funktionsstörung. Brand | Powertrain |
| Porsche | P063800 | No description available | Powertrain |
| SsangYong | P063800 | Throttle actuator control range/performance Brand | Powertrain |
| Mercedes-Benz | P06381D | Der Ausgang für Droselklappenansteller (Zylinderreihe 1) hat Funktionsstörung. Stromwert liegt außerhalb des zulässigen Bereiches. Brand | Powertrain |
| Mercedes-Benz | P063877 | Der Ausgang für Drosselklappensteller (Zylinderreihe 1) hat Funktionsstörung. Befohlene Position nicht erreichbar Brand | Powertrain |
| Sprinter | P063877 | Der Ausgang für Drosselklappensteller (Zylinderreihe 1) hat Funktionsstörung. Befohlene Position nicht erreichbar Brand | Powertrain |
| Mercedes-Benz | P063884 | Throttle Actuator Control Range/Performance Bank 1 signal below allowable range Brand | Powertrain |
6Related codes
Browse Pxxx codes or P063xx codes.