Shift Quality - Harsh Downshift Detected
1995-2005 Pontiac Sunfire 2.2L I4
Description
The TCM detected excessively harsh downshifts. The transition between gears during deceleration is abrupt.
Symptoms
- Check Engine Light
- Harsh downshifts
- Vehicle lurches on deceleration
- Engine braking feels excessive
- Driveline shudder on downshift
- Abrupt speed change during coast-down
Common Causes
- Faulty shift timing solenoid
- Torque converter clutch not releasing
- Pressure control solenoid malfunction
- Valve body wear
- Incorrect TCM calibration
Diagnostic Steps
- Monitor shift quality PIDs during deceleration
- Check TCC release timing
- Test pressure control solenoid
- Inspect shift solenoid operation
- Review TCM software version
Repair Notes
Replace pressure control solenoid or valve body. TCM reflash may be available from manufacturer.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3062 on Other Vehicles
Pontiac Aztek
2001-2005 3.4L V6
Pontiac Bonneville
2000-2005 3.8L V6
Pontiac Bonneville GXP
2000-2005 4.6L V8
Pontiac Bonneville GXP
2000-2005 4.6L V8 Northstar
Pontiac Firebird
1998-2002 3.8L V6
Pontiac Firebird
1998-2002 5.7L V8 LS1
Pontiac Firebird Trans Am
1998-2002 5.7L V8 LS1
Pontiac Firebird Trans Am WS6
2002-2002 5.7L V8 LS1
Common Questions
What does code P3062 mean on a 1995-2005 Pontiac Sunfire?
P3062 stands for "Shift Quality - Harsh Downshift Detected". The TCM detected excessively harsh downshifts. The transition between gears during deceleration is abrupt.
What are the symptoms of P3062 on a Pontiac Sunfire?
Common symptoms of P3062 include: Check Engine Light, Harsh downshifts, Vehicle lurches on deceleration, Engine braking feels excessive, Driveline shudder on downshift, Abrupt speed change during coast-down.
What causes P3062 on a 1995-2005 Pontiac Sunfire?
Common causes of P3062 include: Faulty shift timing solenoid, Torque converter clutch not releasing, Pressure control solenoid malfunction, Valve body wear, Incorrect TCM calibration.