my Honda Civic 9th Generation (2012-2015) engine revs high when in gear what's happening

Honda Civic 9th Generation (2012-2015)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

564 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 high engine RPMs in gear for 2012-2015 Honda Civic. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

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 inspecting components.

Symptoms

•Engine RPMs increase excessively while accelerating
•Poor fuel economy
•Unusual engine noise (e.g., whining or growling)
•Possible engine stalling when coming to a stop
•Check engine light may be illuminated
•Hesitation or sluggishness during acceleration

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
2
Inspect the throttle position sensor (TPS) for proper operation.
3
Check the transmission fluid level and condition.
4
Inspect the clutch (if manual transmission) for wear or slippage.
5
Test the engine's air intake system for leaks or blockages.
6
Verify the operation of the accelerator pedal position sensor.

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
•Screwdriver set
•Multimeter
•Transmission fluid dipstick
•Jack and jack stands

Parts Required

•Throttle position sensor (if replacement is necessary)
•Transmission fluid (if low or changing)
•Clutch assembly (if worn, for manual transmissions)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes.
2
Inspect the throttle position sensor (TPS) for proper operation.
3
Check the transmission fluid level and condition.
4
Inspect the clutch (if manual transmission) for wear or slippage.
5
Test the engine's air intake system for leaks or blockages.
6
Verify the operation of the accelerator pedal position sensor.

Solution

1. Preparation

Gather necessary tools and safety equipment.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Scan for Error Codes

Use an OBD-II scanner to read any stored diagnostic trouble codes (DTCs).
Note any codes related to the throttle position sensor, transmission issues, or engine performance.

3. Inspect and Replace Throttle Position Sensor (if necessary)

Tools Required: Screwdriver set, multimeter
Remove the electrical connector from the TPS.
Using a multimeter, check the resistance values according to the manufacturer’s specifications while moving the throttle.
If readings are outside specifications, replace the TPS as follows:
- Remove the screws securing the TPS to the throttle body.
- Install the new TPS and secure it with screws.
- Reconnect the electrical connector.

4. Check Transmission Fluid

Tools Required: Transmission fluid dipstick and funnel
Remove the transmission fluid dipstick and check fluid level; add fluid if low.
Inspect fluid condition; if burnt or contaminated, consider a transmission fluid change.

5. Inspect Clutch (for Manual Transmissions)

Tools Required: Socket set, jack and jack stands
Raise the vehicle and secure it on jack stands.
Inspect the clutch for signs of wear or slippage.
If the clutch is worn, replace it by removing the transmission and replacing the clutch assembly.

6. Verify Air Intake System

Tools Required: Screwdriver set, vacuum gauge
Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
Check the air filter and replace if dirty.
Use a vacuum gauge to test for leaks in the intake manifold.