how to solve rough shifting in Honda Civic 9th Generation (2012-2015) automatic transmission

Honda Civic 9th Generation (2012-2015)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

561 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix rough shifting issues in Honda Civic 9th Generation (2012-2015) automatic transmission. Step-by-step guide included.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine and transmission to cool before working to prevent burns.

Symptoms

•Harsh or abrupt gear changes
•Delay in shifting between gears
•Engine RPM fluctuations during shifting
•Transmission slipping
•Check engine light illuminated
•Unusual noises during gear engagement

Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any stored trouble codes.
2
Inspect the transmission fluid level and condition; look for discoloration or burnt smell.
3
Check for any fluid leaks around the transmission and related components.
4
Examine the transmission mounts for wear or damage.
5
Test the throttle position sensor (TPS) and input/output speed sensors with a multimeter.
6
Inspect the shift solenoids for proper operation.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Multimeter
•Fluid pump

Parts Required

•Transmission fluid (Honda ATF-Z1 or DW-1)
•Shift solenoids
•Throttle position sensor (if needed)
•Transmission pan gasket

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Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner for any stored trouble codes.
2
Inspect the transmission fluid level and condition; look for discoloration or burnt smell.
3
Check for any fluid leaks around the transmission and related components.
4
Examine the transmission mounts for wear or damage.
5
Test the throttle position sensor (TPS) and input/output speed sensors with a multimeter.
6
Inspect the shift solenoids for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shorts during repairs.

2. Check and Replace Transmission Fluid

Tools Required: Socket set, fluid pump, transmission fluid.
Sub-steps:
1. Locate the transmission drain plug and place a catch pan underneath.
2. Remove the drain plug and allow the old fluid to completely drain.
3. Replace the drain plug and tighten to manufacturer specifications (typically around 20 ft-lbs).
4. Use a fluid pump to refill the transmission with the correct type of fluid (Honda ATF-Z1 or DW-1).
5. Ensure the fluid level is at the correct mark on the dipstick while the engine is running and in park.

3. Inspect and Replace Shift Solenoids

Tools Required: Socket set, torque wrench.
Parts Required: New shift solenoids.
Sub-steps:
1. Remove the transmission pan by unbolting it and then carefully drop it down to access the internal components.
2. Locate the shift solenoids and unplug the electrical connectors.
3. Remove the solenoids by unscrewing them from their mounting locations.
4. Install new solenoids and torque to manufacturer specifications.
5. Reinstall the transmission pan with a new gasket and torque the bolts evenly.

4. Test and Replace Throttle Position Sensor (if necessary)

Tools Required: Multimeter, socket set.
Sub-steps:
1. Disconnect the electrical connector from the throttle position sensor.
2. Measure the resistance across the sensor terminals using a multimeter.
3. Compare readings to manufacturer specifications; if out of range, replace the sensor.
4. Install the new sensor and reconnect the electrical connector.