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P0700 Transmission Control System Malfunction

What it means

The transmission computer has stored its own trouble code and is asking the engine computer to turn on the check engine light. P0700 itself is a pointer — you need a scanner that reads transmission codes for the specific problem.

Severity: Moderate to High

Can I drive it? Depends on symptoms. If shifting is harsh, slipping, or stuck in one gear (limp mode), limit driving and get it checked.

Common causes (most likely first)

Faulty shift solenoid
Low or burnt transmission fluid
Transmission range/speed sensor fault
Wiring or TCM problem

Likely fixes

Scan the transmission module for the specific code
Check fluid level and condition
Repair based on the specific transmission code

DIY parts cost

$20–$300

Approximate estimate

Shop repair cost

$100–$3,500+

Approximate estimate, parts + labor

DIY difficulty

Moderate to Hard

Varies by vehicle

Cost ranges are rough, approximate U.S. estimates and vary widely by vehicle, region, and parts brand. Always confirm the diagnosis before buying parts.

Parts you may need

Transmission fluidCheck price
Transmission filter kitCheck price
Shift solenoidCheck price

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