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In low-speed driving such as traffic jams or residential areas, the reaction to accelerator operation may be unstable.
Especially in VW’s TSI, TDI, and DSG, both the engine side and the mission side have causes, and if left untreated, even mild symptoms tend to worsen the shock and breathing at start.
In this article, we will organize the causes of “jerking” at low speeds by structure and explain in an easy-to-understand manner when to suspect which area.
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- Common symptoms
- There are four main causes.
- Cause (1) 😀 SG low-speed control disturbance (most common)
- Cause (2): Dirt on the throttle valve and airflow (instability of the intake control)
- Cause (3): Weak ignition system (coil plug)
- Cause (4): Deterioration of the engine and mission mount (unable to absorb shaking)
- Points that can be checked in DIY
- Is it okay to drive? (Urgency)
- Approximate repair cost
- Related parts to check at the same time
- Conclusion
- Defect details by vehicle type
- Frequently Asked Questions (FAQs)
Common symptoms
- If you step on the accelerator a little, it will suddenly connect
- Creep becomes stronger or weaker
- Jerking around 5 to 20 km/h
- The car shakes back and forth with the accelerator on/off
- The feeling is not stable from start to low speed
- Symptoms may intensify when the air conditioner is turned on
There are four main causes.
- Disturbance of DSG’s low-speed control (gear selection, clutch control)
- Dirt on the throttle and airflow (misalignment of the intake volume control)
- Weak ignition system (misfire)
- Deterioration of engine and transmission mounts (shaking amplified)
Cause (1) 😀 SG low-speed control disturbance (most common)
When does it happen?
- Swaying back and forth at 10-20 km/h or less
- Creep is inconsistent
- D/R switching is jerky
Why do I have that symptom?
It is common in the dry 7-speed DSG (DQ200),
and symptoms
such as misalignment of the clutch connection and control of the 1st/2nd gear, jerk connection at low
speeds, sudden connection
with the accelerator on, and swaying back and forth with the accelerator off.
The same applies to deviations in learning values and delays in the operation of mechatronics.
If left unattended?
- Getting worse
- Increased start-up shock
- Some cases lead to clutch wear
Cause (2): Dirt on the throttle valve and airflow (instability of the intake control)
When does it happen?
- Slow / strong response only at the beginning of stepping on the accelerator
- Idling is also somewhat unstable
- Rotation drops when the air conditioner is turned on
Why do I have that symptom?
If there is dirt on the throttle or MAF (airflow) error,
the ECU cannot correctly calculate the intake volume, and the rotation will flutter at low speeds.
In particular, the “kick” at the beginning of the step is uneven, and
the reaction to the accelerator suddenly becomes stronger or weaker.
If left unattended?
- Worsening breathing and limping
- Idling unsteady progress
- Low-speed jerks become constant
Cause (3): Weak ignition system (coil plug)
When does it happen?
- It shakes only at low speeds
- Falling with a moment of “stern” when the accelerator is turned on
- Not so much of a problem at high speeds
Why do I have that symptom?
If the ignition energy is weakened due to the deterioration of the ignition coil or plug,
misfire is likely to occur in the low load range.
If there is a slight misfire from starting to low speed, you will feel the car shaking.
If left unattended?
- Check engine light on
- Progression to poor acceleration
- Worse fuel economy
Cause (4): Deterioration of the engine and mission mount (unable to absorb shaking)
When does it happen?
- The car body shakes back and forth when starting and stopping
- The car moves with the accelerator on/off
- I was shocked by the D→R switch
Why do I have that symptom?
When the mount sags,
it cannot absorb the movement of the engine transmission and is transmitted directly to the car body.
Even a slight breath can be felt as a big shaking.
If left unattended?
- Back-and-forth shaking worsens
- Other Mount Damage Risks
- DSG shock feels even stronger
Points that can be checked in DIY
- Only 10-20 km/h jerky → doubt DSG control
- Idle rotation up and down → Throttle/Airflow system
- Symptoms increase with air conditioner on → Intake and control system
- Strong shock when switching between D/R → mount system
- Light knocking feeling → Ignition system
*If it is difficult to make a self-judgment, do not overdo it and go to the factory.
Is it okay to drive? (Urgency)
- Only light jerks: Allowed to drive (early inspection recommended)
- Large shock when switching D/R: Medium (possibility of mount deterioration)
- Large swaying back and forth at low speed: medium to high
- Warning light on/misfire: High (no driving, towing recommended)
When a driving problem occurs, it may be necessary to tow the truck depending on the situation.
In these cases, it may be covered by road assistance or riders of automobile insurance, so it is safe to lightly review the contents of your current contract.
If you may not have a proper understanding of the coverage, you can use a comparison service to check the coverage details and premiums of multiple companies at once. Since you can get a complete picture in a short time, many people use it for repairs and inspections.
👉 Free Car Insurance Bulk Quote Service
Approximate repair cost
| Work Description | Approximate cost |
|---|---|
| DSG Learning Value Reset | 5,000 to 15,000 yen |
| Throttle Cleaning | 5,000 to 15,000 yen |
| Airflo replacement | 15,000 to 30,000 yen |
| Ignition Coil Replacement | 15,000 to 35,000 yen |
| Engine mount replacement | 20,000 to 50,000 yen |
You can scroll
*Early inspection is cheaper as a result.
👉Summary of maintenance and custom costs & working days of VW specialty store Nile Plus
Related parts to check at the same time
- Operating values of DSG clutch mechatronics
- Throttle Valve MAF
- Engine Mount
- Ignition coil plug
- Intake air leakage (hose pipe)
- Idle Control Value
▼List of individual pages about engine and drive system repair and maintenance▼
You can scroll
Conclusion
The symptoms of jerky at low speeds are often caused by multiple factors such as the low speed control of the DSG, dirt in the intake control, weak ignition system, and deterioration of the mount.
Especially in TSI and TDI, there are often cases where the “reaction at the beginning of stepping” becomes unstable. It will be difficult to drive even if it is mild, so it is safe to check it as soon as possible.
Even if the symptoms are similar, the causes vary from vehicle to vehicle.
Even if it is the same jerky, there are various causes such as DSG, intake system, ignition system, mount, etc.
If you are unsure, it is safe to have it inspected at a maintenance shop without overdoing it.
Defect details by vehicle type
Although the “way of getting out” the defect is similar, “which model has many problems” is slightly different for each car model.
Trends by vehicle model and common breakdown cases among other owners are summarized on the following page.
You can scroll
Frequently Asked Questions (FAQs)
Q1. Is it okay to drive at low speeds and jerks?
If it is mild, it is possible to drive itself. However, if the DSG control is disturbed or the ignition system weakens, it can lead to starting shock and misfire, so it is safe to check as soon as possible. If there is a large shock when switching to D/R or if the warning light comes on, refrain from driving.
Q2. Which is more common cause of low-speed jerks, DSG or engine?
The most common is the disturbance of the DSG’s low-speed control. However, multiple factors such as throttle dirt, ignition coil deterioration, and mount sloppy often overlap, making it difficult to determine “one or one”.
Q3. Is there a way to determine the cause by myself to some extent?
Shaking only 10-20km/h → DSG
Accelerator starts suddenly strong/slow → Throttle/Airflow
D/R switching → Worsens with mounted
air conditioner on → Intake and control system
Light knocking → Ignition system
These are only guidelines, and a diagnostic machine is required to make a definitive decision.
Q4. Does throttle cleaning or learning value reset improve my symptoms?
Yes, there are many cases where mild jerks can be improved. It is especially effective when it is caused by throttle dirt, intake volume error, or misalignment of learning values. However, if it is caused by clutch wear or mount deterioration, it will not fundamentally improve the situation.
Q5. How much should I pay for repairs?
The approximate market price is as follows:
DSG learning value reset: 5,000 to 15,000 yen
, throttle cleaning: 5,000 to 15,000 yen
, airflow replacement: 15,000 to 30,000 yen
, ignition coil replacement: 15,000 to 35,000 yen
・Engine mount replacement: 20,000 to 50,000 yen
It is not uncommon for multiple causes to overlap, and in that case, the cost will be added.
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