my Honda Accord engine revs but doesn't accelerate, what's wrong?

Honda Accord 9th Generation (2013-2017)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

539 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 in Honda Accord. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

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 checking or working on the cooling system.

Symptoms

•Engine revs without increasing vehicle speed
•Unusual engine noise (e.g., high RPM without load)
•Possible check engine light illuminated
•Increased fuel consumption
•Transmission slipping or harsh shifting

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for transmission or engine-related issues.
2
Inspect the throttle cable for proper operation and any signs of damage or disconnection.
3
Check the transmission fluid level and condition to ensure it is not low or burnt.
4
Test the accelerator pedal position sensor for proper voltage and functionality.
5
Examine the fuel delivery system, including fuel pump pressure and fuel filter condition.
6
Inspect the air intake system for blockages or leaks that could affect engine performance.

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
•Multimeter
•Screwdrivers
•Transmission fluid pump

Parts Required

•Throttle cable (if damaged)
•Transmission fluid (specific to Honda Accord)
•Accelerator pedal position sensor (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for transmission or engine-related issues.
2
Inspect the throttle cable for proper operation and any signs of damage or disconnection.
3
Check the transmission fluid level and condition to ensure it is not low or burnt.
4
Test the accelerator pedal position sensor for proper voltage and functionality.
5
Examine the fuel delivery system, including fuel pump pressure and fuel filter condition.
6
Inspect the air intake system for blockages or leaks that could affect engine performance.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Throttle Cable

Sub-steps:
1. Locate the throttle cable at the engine bay connected to the throttle body.
2. Check for fraying, kinks, or disconnections.
3. If damaged, remove the old throttle cable by disconnecting it from the throttle body and the accelerator pedal.
4. Install the new throttle cable by connecting it to the throttle body and accelerator pedal.
5. Adjust the cable tension as per manufacturer specifications.

3. Check and Replace Transmission Fluid

Sub-steps:
1. Locate the transmission dipstick (if equipped) and remove it.
2. Wipe it clean, reinsert, and remove to check fluid level.
3. If the fluid is low, add the correct type of transmission fluid (refer to owner's manual).
4. If fluid is burnt or dirty, perform a transmission fluid change by draining the old fluid and replacing it with new fluid.
5. Dispose of old fluid properly and check for leaks after filling.

4. Test and Replace Accelerator Pedal Position Sensor

Sub-steps:
1. Locate the accelerator pedal position sensor near the accelerator pedal.
2. Disconnect the electrical connector and inspect for corrosion or damage.
3. Use a multimeter to test the sensor output voltage while pressing the pedal.
4. If readings are outside the specified range, replace the sensor with a new one.
5. Reconnect the electrical connector and test the pedal operation.