why does my Honda Accord 9th Generation (2013-2017) transmission slip when accelerating

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

521 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 transmission slipping issues in Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and solutions.

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 to cool before handling the transmission components.

Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed
•Harsh or delayed shifting between gears
•Warning lights illuminated on the dashboard (e.g., Check Engine Light)
•Unusual noises coming from the transmission (grinding or whining)
•Fluid leakage under the vehicle
•Poor fuel economy

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Examine the transmission filter for clogs or blockages.
5
Test the throttle position sensor (TPS) for proper function.
6
Inspect the transmission control module (TCM) for faults or software updates.

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

•Transmission fluid pump
•Fluid catch pan
•Funnel
•Socket set
•Torque wrench
•Multimeter
•OBD-II scanner

Parts Required

•Transmission fluid (Honda HCF-2 or equivalent)
•Transmission filter
•Gasket for transmission pan
•Throttle position sensor (if faulty)

Related Faults

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Symptoms

•Engine RPM increases without a corresponding increase in vehicle speed

•Harsh or delayed shifting between gears

•Warning lights illuminated on the dashboard (e.g., Check Engine Light)

•Unusual noises coming from the transmission (grinding or whining)

•Fluid leakage under the vehicle

•Poor fuel economy

Diagnostic Steps

1
Check the transmission fluid level and condition using the dipstick.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
3
Inspect the transmission fluid for contamination or burnt smell.
4
Examine the transmission filter for clogs or blockages.
5
Test the throttle position sensor (TPS) for proper function.
6
Inspect the transmission control module (TCM) for faults or software updates.

Solution

1. Preparation

Gather necessary tools and parts before starting.
Ensure the vehicle is parked on a level surface and engage the parking brake.
Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission dipstick and wipe it clean.
2. Insert the dipstick back into the tube and remove it again to check fluid level.
3. If low, add the correct type of ATF (Honda HCF-2 or equivalent) as specified in the owner's manual.
4. If the fluid is burnt or contaminated, proceed to drain and replace.
Tools Required:
- Transmission fluid pump
- Fluid catch pan
- Funnel

3. Replace Transmission Filter

Sub-steps:
1. Remove the transmission pan by loosening the bolts and allowing fluid to drain.
2. Replace the old filter with a new one, ensuring the seal is clean.
3. Reinstall the transmission pan with a new gasket, torquing bolts to the manufacturer's specifications.
Tools Required:
- Socket set
- Torque wrench

4. Inspect and Test TPS and TCM

Sub-steps:
1. Disconnect the throttle position sensor connector.
2. Use a multimeter to check the voltage output of the TPS at idle and full throttle.
3. If readings are out of specifications, replace the TPS.
4. For the TCM, check for software updates or faults, and reprogram if necessary.
Tools Required:
- Multimeter
- OBD-II scanner