P0700 Code: Transmission Control System (MIL Request)
CodePage.genericDisclaimer
¿Qué significa esto?
Code P0700 indicates the Transmission Control Module (TCM) has detected a malfunction and is requesting the PCM to illuminate the Check Engine Light. This is an informational code — there will be additional, more specific transmission codes stored.
Most Common Causes for Lexus Is
- Solenoide de cambio de transmisión defectuoso
- Líquido de transmisión bajo, sucio o quemado
- Cuerpo de válvulas de la transmisión desgastado
- Convertidor de par o embrague de bloqueo defectuoso
- Sensor de velocidad de entrada/turbina defectuoso
- Sensor de velocidad de salida defectuoso
- Solenoide de control de presión de transmisión defectuoso
- Arnés de cableado dañado o roto
Síntomas a tener en cuenta
- La luz de Check Engine está encendida
- La transmisión patina entre marchas
- Cambio de marcha brusco o duro
- Enganche de marcha retrasado
- La transmisión se queda atascada en una marcha
- El vehículo entra en modo de potencia reducida
CodePage.beforeReplacing
- Check for blown fuses related to the circuit.
- Inspect the wiring harness and electrical connectors for visible damage or corrosion.
- Verify the 12V battery is fully charged, as low voltage can trigger false codes.
- Look for obvious vacuum leaks or cracked hoses under the hood.
Cómo Diagnosticar
CodePage.commonMistakes
A very common mistake when diagnosing the P0700 code is automatically replacing the sensor or component mentioned in the code description without first testing it. Electrical issues, wiring damage, or vacuum leaks are frequently the true cause. Always use a multimeter and live data scanner to verify component failure before spending money on parts.
CodePage.faq
Can I drive with the P0700 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0700 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0700 code, your Lexus will automatically fail an OBD2 plug-in emissions or smog test.
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Estimación de reparación
Incluye repuestos y mano de obra. Puede variar por ubicación.
Dificultad de reparación (DIY)
Can usually be performed at home with basic hand tools.