P0700

Transmission Control System (MIL Request)

Transmission Generic OBD-II High

What it means

P0700 is a general notification code: the transmission control module (TCM) has detected a fault and asked the engine computer to turn on the check-engine light. It doesn't pinpoint the problem on its own — it flags that one or more transmission-specific codes (P0701 and up) are stored. Many vehicles drop into limp mode until the underlying fault is read and repaired.

High

Can I keep driving? Often driveable for short trips, but expect limp mode, harsh shifts or being stuck in one gear; read the transmission sub-code and fix it soon to avoid further damage.

Real-world scan data

Seen in

1,029

scans in the past year

Found in

0.2%

of scans

0.3%

of scans that found faults

Appears alongside · share of P0700 scans

U0100in 13.6% of scans

U0101in 9.8% of scans

P0562in 8.8% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Harsh, rough or delayed gear changes
Difficulty shifting or stuck in one gear (limp mode)
Transmission slipping or hesitating
Reduced fuel economy

Common causes

Most likely first

Low or contaminated transmission fluidLikely
Damaged or corroded wiring/connectors at the transmissionCommon
Failing shift solenoid(s)Common
Faulty transmission control module (TCM)Less often
Internal mechanical transmission wear or failureLess often

How to diagnose & fix

Work through it in order

Scan for the manufacturer-specific transmission sub-codes stored with P0700 — P0700 alone gives no detail, so those codes point to the real fault.
Check transmission fluid level and condition; top up or service if low, burnt or contaminated.
Inspect wiring and connectors at the transmission for damage or corrosion.
Test and replace faulty shift solenoids as indicated by the sub-codes.
If circuits check out, evaluate the TCM; leave internal transmission repair for last.

FAQ

Quick answers

Is it safe to drive with P0700?+

Short trips are usually possible, but the transmission may drop into limp mode (one gear) and shift harshly. Get the sub-codes read soon — driving on a real transmission fault can cause more damage.

Can I just clear P0700?+

It will come back until the underlying transmission fault is fixed. P0700 is only a flag that the TCM has stored other codes, so clearing it hides the actual problem.