P3060critical severityPowertrain
Gear Ratio Error - Multiple Gears Affected
on 2003 Buick Century 3.1L V6 · FWD
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1