Transmission Control System Malfunction Indicator Request
P0700 in the engine computer generally indicates that the transmission controller requested the malfunction indicator. It does not identify the underlying failure or justify replacing the engine computer or transmission. A compatible scanner must read the transmission module's own codes. Electrical and transmission-performance faults can both lead to the request, so actual shifting behavior determines the immediate precautions.
Can I keep driving?
Slipping, harsh engagement, inability to select or hold a gear, burning odor or a transmission-temperature warning calls for a safe stop and towing. If only the light is on and shifts feel normal, get guidance from a shop familiar with the transmission before further driving.
Flashing light, burning smell or smoke? Pull over safely. Danger to life: call 911.
What does this code mean for your car?
The same code can need different checks depending on the model and engine. Enter your vehicle details to find relevant sources and checks.
Symptoms
- Check engine light and possible transmission message
- Harsh shifts or a limited-gear mode
- There may be no noticeable change
Possible causes
- 1A transmission-module fault requiring its own code scan
- 2Transmission sensor or wiring problem
- 3Detected hydraulic or mechanical transmission fault
- 4Voltage or communication problem affecting control
These possibilities are not ranked by frequency and do not diagnose your vehicle.
Checks you can safely do yourself
Safe checks only: engine off and cold, car on level ground.
- Save the code and freeze-frame data if your scanner offers them, without clearing anything.
- Save transmission-module codes if the scanner can show them; if it cannot access that module, request a professional scan instead of guessing parts.
When you need a shop
Request a transmission-module scan, accompanying codes and freeze-frame information, then diagnosis of those faults. P0700 alone is not a reason to replace the engine computer. Engagement problems or slipping calls for towing.
How much does it cost?
A US repair estimate needs a diagnosis and a local shop quote.
No verified US repair quote is available for this fault. The price depends on diagnosis, vehicle, parts and local labor; request 2-3 itemized quotes.
Get 2-3 quotes
Investigate this code for my carFAQ
Can I keep driving with P0700?
Slipping, harsh engagement, inability to select or hold a gear, burning odor or a transmission-temperature warning calls for a safe stop and towing. If only the light is on and shifts feel normal, get guidance from a shop familiar with the transmission before further driving.
What can cause P0700?
Possible causes include a transmission-module fault requiring its own code scan; transmission sensor or wiring problem; detected hydraulic or mechanical transmission fault; voltage or communication problem affecting control. These are diagnostic possibilities, not a confirmed diagnosis or a parts shopping list.
Does clearing the code fix the problem?
No. Clearing a code does not repair the problem or prove that no fault exists. It may erase useful evidence and reset readiness monitors. Save codes and freeze-frame data first; confirming a repair requires the vehicle-specific checks.
What if this code appears during a used-car inspection?
Arrange an independent professional pre-purchase inspection before committing. Request a complete scan, readiness status and diagnosis of the relevant system. Get written findings and a repair estimate; an unlit warning lamp does not replace inspection.
How much does a P0700 repair cost?
No verified US repair quote is available for this fault. The price depends on diagnosis, vehicle, parts and local labor; request 2-3 itemized quotes.