Diagnostic Overview
Meaning: Fault code P0700 indicates that your vehicle's Engine Control Module (ECM/PCM) has registered a threshold discrepancy for transmission control system (mil request).
Can I Drive With This Code? Yes, you can safely drive for short distances, but prompt diagnostic inspection is recommended to prevent secondary damage or reduced engine performance.
What does the P0700 code mean?
Diagnostic Trouble Code (DTC) P0700 is defined as Transmission Control System (MIL Request). This trouble code is logged when the onboard computer detects operational values outside calibrated thresholds.
When stored, the system illuminates the Check Engine Light (MIL) to alert the driver of an active fault condition.
Common Symptoms of Code P0700
Depending on vehicle model and operating conditions, symptoms may include:
- Check Engine Light on
- Transmission shifting poorly, slipping, or refusing to change gears
- Instrument cluster transmission warnings active
- Poor acceleration (stuck in high gear)
Common Potential Causes for Code P0700
Common causes for P0700 include:
- Cause 1: Fault in the Transmission Control Module (TCM)
- Cause 2: Solenoid failure inside transmission valve body
- Cause 3: Low or dirty transmission fluid
- Cause 4: Wiring harness connector to transmission damaged
Inspection Checklist
Recommended diagnostic procedures:
- Step 1: Connect OBDAssistant and scan all modules. Look for secondary codes under the TCM (e.g. shift solenoids or speed sensors).
- Step 2: Check transmission fluid level and quality.
Symptoms that lead to P0700
If you have not scanned the car yet, or P0700 is one of several codes stored, these guides start from what the vehicle is actually doing.