Hyundai Check Engine Code
P0700 on Hyundai
Transmission Control System Malfunction
Also covers: Kia, Genesis
P0700 on Hyundai: what makes it different
P0700 is a generic notice from the engine ECU that the transmission control module has stored its own fault. On Hyundai, this code is very common on vehicles with the 6-speed automatic (A6MF/A6LF) and the dual-clutch DCT used in Veloster, Elantra GT and Kona, where internal solenoid and clutch issues are well documented.
Most-affected engines
- 2.4L Theta II with A6MF automatic (Sonata, Santa Fe, Tucson)
- 1.6T Gamma with 7-speed DCT (Veloster Turbo, Elantra GT, Kona)
- 2.0L Nu with A6MF (Elantra, Forte cousin platforms)
Common model years: 2011–2020
Most likely cause on Hyundai
A stored transmission code (often a shift solenoid or clutch slip code) inside the TCM — P0700 itself is just the pointer.
Known Hyundai engine-family issues
Hyundai's 6-speed automatic has a documented history of solenoid and valve body issues, and the 7-speed DCT has well-known clutch judder and actuator complaints. Hyundai has extended powertrain warranties on certain affected transmissions in North America — owners should check with a Hyundai dealer using their VIN to see if any extended coverage applies before paying out of pocket.
Hyundai-specific causes (most common first)
- Internal shift solenoid fault in the A6MF/A6LF 6-speed
- DCT clutch wear or actuator fault on 7-speed dual-clutch units
- Low or degraded ATF (Hyundai SP-IV fluid) causing slip codes
- TCM software needing a reflash (handled by dealer)
- Wiring harness chafe at the transmission connector
- Failed input/output speed sensor
Hyundai-specific diagnostic tip
P0700 by itself tells you almost nothing. You must scan the TCM (transmission module), not just the engine ECU — many basic code readers only read engine codes and will show P0700 with no detail. Use a scanner that reads all modules (or the AXLY app with full-system access where supported) to pull the actual U-code or P07xx/P08xx code stored in the TCM. That secondary code is what you actually diagnose.
Symptoms drivers report
- Check engine light
- Harsh, slipping, or delayed shifts
- Transmission stuck in one gear (limp mode)
- No reverse or no forward gears in severe cases
Typical repair cost on Hyundai
Most Hyundai owners fix P0700 for between $150 and $4500, depending on which underlying cause turns out to be at fault. Start with the most-likely cause for your vehicle — A stored transmission code (often a shift solenoid or clutch slip code) inside the TCM — P0700 itself is just the pointer. — before throwing parts at it.
Hyundai P0700 FAQ
Can I just clear P0700 and keep driving my Hyundai?
You can clear it, but it will return as soon as the transmission faults again. More importantly, the TCM may put the trans into limp mode (locked in 3rd gear) until the underlying issue is fixed.
Is my Hyundai transmission covered under warranty for P0700?
Possibly. Hyundai's 10-year/100,000-mile powertrain warranty (original owner) covers internal transmission failures, and there have been extended coverage programs on certain DCT and 6-speed units. Call a dealer with your VIN.
Does a fluid change fix P0700 on Hyundai?
Sometimes, if the cause is degraded fluid causing a solenoid or slip code. Use only Hyundai SP-IV (or the exact fluid spec in your owner's manual). The wrong fluid can make shifting worse.
Related codes
Drive a different make? See the general P0700 guide for cross-vehicle causes and symptoms.
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