P3060critical severityPowertrain
Gear Ratio Error - Multiple Gears Affected
on 2023 BMW i7 M70 Dual Motor AWD · AWD
What this code means
The TCM detected incorrect gear ratios in more than one gear. This typically indicates an internal mechanical transmission problem.
Symptoms
- Check Engine Light
- Slipping in multiple gears
- RPM flare on upshifts
- Harsh downshifts
- Delayed engagement
- Abnormal transmission noise
Common causes
- Internal clutch pack wear
- Worn planetary gear set
- Valve body malfunction
- Low transmission fluid
- Contaminated transmission fluid
Diagnostic steps
- Check transmission fluid level and condition
- Monitor gear ratio PIDs in all gears
- Perform transmission pressure test
- Inspect fluid for metal particles
- Review shift adaptation data
Repair notes
Internal transmission repair or replacement likely required. Replace fluid and filter as part of any repair.
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