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RyanAutomotive:
Google About, Ryan Automotive Limited

RyanAutomotive:
Good afternoon sir.

Vehicle Details Required

You have not included the vehicle’s make, model, and year of manufacture in your post. Kindly provide these details, along with the transmission type, so we can give you a more precise professional assessment.

From the diagnostic scanner image, I can identify two important fault codes:

* P0328 — Knock Sensor 1 Circuit High Input
* P0717 — Input/Turbine Speed Sensor ‘A’ Circuit No Signal

You also mentioned that the vehicle jerks during gear changes, stutters more frequently when the temperature is high, and responds slowly when you press the accelerator.

Let’s address these symptoms systematically before any unnecessary parts replacement.


1, What P0328 Means — Knock Sensor Circuit

P0328 indicates that the engine computer has detected an abnormally high electrical signal from the knock sensor circuit.

Possible causes include:

• A faulty knock sensor.
• Damaged wiring or a loose connector.
• An electrical grounding or circuit fault.
• A problem with the sensor signal circuit.

The knock sensor helps the engine computer detect abnormal combustion vibrations and adjust ignition timing when necessary.

If the sensor circuit provides incorrect information, engine performance may be affected, depending on the vehicle’s control strategy. This could contribute to sluggish acceleration, but the code alone does not confirm that the knock sensor is responsible for all your symptoms.



2, What P0717 Means — Input/Turbine Speed Sensor ‘A’

P0717 indicates that the transmission control system is not receiving the expected signal from the input/turbine speed sensor.

This sensor provides information about the rotational speed of the transmission input shaft or turbine, depending on the transmission design.

Possible causes include:

• A faulty speed sensor.
• Damaged wiring or loose electrical connections.
• An electrical supply or grounding problem, where applicable.
• An intermittent fault in the sensor circuit.
• An internal transmission-related problem affecting the speed signal.

How can this affect your vehicle?

If the transmission computer cannot obtain a reliable speed signal, it may struggle to control gear changes correctly. Depending on the vehicle, this can cause harsh shifting, abnormal transmission operation or a protective operating mode.

This makes P0717 particularly important to investigate because you specifically complained about jerking during gear changes.


3, Important Observation: The Problem Gets Worse When Hot

You mentioned that the vehicle stutters more frequently when the temperature is high and responds slowly to acceleration.

This is an important diagnostic clue.

An electrical connection or sensor may develop an intermittent fault as it heats up. However, fuel delivery problems, ignition faults, transmission issues and other engine-management problems can produce similar symptoms.

We therefore need to establish whether the fault occurs in the engine-management system, transmission system or both.

Also, the scanner shows the codes under different statuses, including current, pending and history. These statuses should be interpreted carefully to establish which faults are presently active and which may have occurred previously.



4, What Should Be Checked Now?

Before purchasing any replacement parts, I recommend the following diagnostic procedure:

1. Complete Computerized Diagnostics

Scan the relevant engine and transmission control systems, retrieve all fault codes and examine available freeze-frame information.

2. Input Speed Sensor Circuit

Inspect the sensor, wiring harness and connectors. Use live data to determine whether the transmission input-speed signal is missing, intermittent or implausible.

3. Knock Sensor Circuit

Test the knock sensor circuit and inspect its wiring, connector and grounding according to the manufacturer’s specifications.

4. Engine Performance Assessment

Examine relevant live data and investigate possible causes of the stuttering and delayed acceleration, including fuel delivery, ignition and air-metering systems where indicated.

5. Transmission Assessment

Check the transmission fluid level and condition using the correct procedure for the specific vehicle. Further testing may be necessary depending on the results.

6. Controlled Road Test

If the vehicle is safe to operate, reproduce the symptoms while monitoring the relevant live data, particularly as the engine and transmission reach operating temperature.


5, Do NOT Do This

• Do not replace the knock sensor simply because P0328 appears.
• Do not replace the input speed sensor without checking its circuit.
• Do not condemn the entire gearbox based on P0717 alone.
• Do not repeatedly clear the fault codes without investigating their causes.
• Do not continue driving aggressively while the vehicle is jerking or responding unpredictably.

The correct approach is to diagnose the fault first and replace only the components proven to be defective.


6, Professional Insight

Of the two codes, P0717 deserves particular attention because it may be directly related to the gear-shifting complaint. P0328 also requires proper investigation because it indicates an abnormal signal in the knock sensor circuit.

However, we cannot conclude that either code explains every symptom without further testing.

The missing vehicle information is also important because sensor locations, transmission designs, diagnostic procedures and specifications vary between models.



7, Ryan Automotive Limited Recommendation

At Ryan Automotive Limited, we recommend a structured diagnostic assessment rather than trial-and-error repairs.

Our approach includes:

* Computerized fault-code analysis.
* Live-data monitoring.
* Sensor and electrical circuit testing.
* Engine performance assessment.
* Transmission diagnostics and inspection where required.
* Identification of the root cause before recommending repairs.

If you are in Lagos or can bring the vehicle down, you are welcome to visit Ryan Automotive Limited, along LASU–Isheri Road, for professional assessment.
• Kindly provide the following details so we can guide you more accurately:

1. Car make.
2. Model.
3. Year of manufacture.
4. Engine size.
5. Transmission type.
6. Whether the check-engine light is currently on.

RYAN AUTOMOTIVE LIMITED
Precision • Transparency • Excellence.

Louiscars:
What type of vehicle; make model and year

erico2k2:
What car are you driving? cos some cars you have to reprogram the system to let it know it has to re charge the battery.There is a place to clixk that says change battery

Namzy:
The last 4 codes are consequences of overfilling your fuel tank. Very common with fuel attendants when asked to fill your tank. Instead of the attendant to stop filling when they get the click, they pump in extra fuel. Now your car will end up sucking in the excess fuel instead of fuel vapor into your charcoal canister throwing those codes. If you are lucky and stop the practise, the fuel in charcoal canister can dry up and the codes will disappear. If not you have to get another expensive charcoal canister for your car. Usually the codes are 5, the code p2419 is missing

conqueror221:
P0328
P043E
P043F
P2401
P2402

Abbeyismo:
Okay can you drop the scan code so we can know what the systerm is talking about.
If it some thing to replace or wiring issue

Abbeyismo:
What type of car are we looking at?

Bola4boy:
you be money miss road fah. You left when they are installing what you bought with your hard earned money and you can't confirm the location of catalyst from Google. Na wa o

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