Severity: Fix right away. Driving risks expensive damage or a breakdown.
The transmission computer has found a fault and asked the engine computer to turn on the check-engine light. This code alone does not say what is wrong — there will be other transmission codes stored with it.
Read the transmission codes with a scan tool — they will say what is actually wrong. Check the fluid level and condition first.
Check the transmission fluid level first. Slipping, harsh shifting, or limp mode means stop driving and get it checked.
Avoid driving until it is checked — towing is the safer choice. Check the transmission fluid level first. Slipping, harsh shifting, or limp mode means stop driving and get it checked.
The most common causes are: Fault inside the transmission; Failed transmission sensor or solenoid; Low transmission fluid; Failing transmission computer. A scan tool and a visual check of the parts above is where a technician starts.
Read the transmission codes with a scan tool — they will say what is actually wrong. Check the fluid level and condition first.
