Polling lamps in ŠKODA Yeti - a standard self-diagnosis function that checks the functionality of all lighting devices when the ignition is turned on. However, many owners are faced with a situation where the system generates false errors (for example, after installing LED lamps or when the contact in the socket is broken). In such cases disabling lamp polling becomes an urgent task - this allows you to get rid of annoying messages on the dashboard without losing the functionality of the lighting.

In this article we will look at three main methods to disable polling: via diagnostic scanner VCDS (the most reliable way), using universal OBD-2- adapters (for example, OBDeleven or Carista), as well as manual methods for individual lamps (for example, markers or brake lights). We will pay special attention security implications of disabling polling — why in some cases it is better not to deactivate the function completely, but to correct the cause of the error.

Why does the lamp polling system give errors?

B ŠKODA Yeti (especially models 2009–2017) lamp polling is implemented via body electronics control unit (BCM). The system measures the circuit resistance of each lamp and compares it with reference values. If the resistance is outside the normal range (for example, when installing low-power LEDs or when the contacts are oxidized), a warning will light up on the instrument panel.

The main reasons for false positives:

  • 🔋 Installation LED lamps instead of halogen (LED resistance is lower than that of an incandescent filament).
  • 🔌 Poor contact in the socket or connector (oxidation, corrosion, wire break).
  • 🚗 Malfunction BCM or unit firmware (less common, but requires diagnostics).
  • ⚡ Consequences of a short circuit in the lighting circuit.

Before turning off polling, check fault codes through a diagnostic scanner. For example, error 02425 - Low beam lamp (left): open/short circuit may indicate a real problem rather than a false positive. In such cases, disabling polling only masks the problem.

📊 Which lamp are you experiencing polling errors with?
  • Side lights
  • Brake lights
  • Low/high beam
  • Fog lights
  • Other

Method 1: Disable polling via VCDS (the most reliable method)

VCDS (or VAG-COM) - official diagnostic tool for group cars VW, including ŠKODA Yeti. This method allows selectively disable polling for specific lamps without affecting other functions BCM.

Step by step instructions:

  1. Connect VCDS to the diagnostic connector OBD-2 (located under the steering wheel, to the left of the pedals).
  2. Launch the program and select a model ŠKODA Yeti (indicate the exact year of manufacture).
  3. Go to block 09 — Cent. Elect. (Central Electronics).
  4. Select Adaptation — 10.
  5. In the channel list, find parameters related to lamp polling (for example, Leuchtenprüfung or Lamp Check).
  6. For each lamp whose polling you want to disable, set the value not active or 0.

Example of channels to disable (may vary depending on the firmware BCM):

Channel Description Disable value
Tagfahrlicht Links Left daytime running / clearance survey not active
Bremslicht Brake light poll 0
Nebelschlussleuchte Rear fog lamp survey not active
⚠️ Attention: After changes in BCM be sure to reset errors (button Clear DTCs in VCDS). Otherwise, old fault codes may remain in the unit's memory.

☑️ Preparing to work with VCDS

Done: 0 / 4

Method 2: Using OBD-2 adapters (OBDeleven, Carista)

If you don't have access to VCDS, you can use universal OBD-2- adapters such as OBDeleven or Carista. These devices allow you to change settings BCM via a mobile application, but have limitations compared to VCDS:

  • 📱 Not all models supported ŠKODA Yeti (check compatibility by VIN).
  • 🔧 Lack of fine tuning for individual lamps (most often the polling is completely turned off).
  • 💰 Paid features (eg. OBDeleven purchase of credits will be required).

Instructions for OBDeleven:

  1. Connect the adapter to the connector OBD-2 and sync with the app.
  2. Select section Control Units → BCM (Central Electronics).
  3. Go to Adaptation and find the parameter Lamp Check.
  4. Set value Off or Disabled.
  5. Save changes and reboot BCM (turn off/on the ignition).
⚠️ Attention: In some firmware BCM after disabling polling via OBDeleven can reset other settings (for example, automatic door locking). Write down the individual parameters of the car in advance.
💡

If, after turning off lamp polling in OBDeleven an error message appeared on the panel ESP, reset the block adaptation ABS (section Brake Electronics).

Method 3: Manually disable polling for individual lamps

If the error occurs only for one or two lamps (for example, parking lights or brake lights), you can do without diagnostic equipment. The essence of the method is imitation of standard resistance circuit by installing resistors or modifying the wiring.

Manual shutdown methods:

  • 💡 Installation of ballast resistors (for LED lamps). A resistor is connected in parallel with the lamp and creates a load corresponding to a halogen lamp (usually 6–24 Ohm, power 5–10 W).
  • 🔧 Deception of contacts in the cartridge. For example, for dimensions you can close the contacts +12V and mass through a resistor, simulating a work lamp.
  • ⚡ Wiring modification (only for experienced ones!). For example, disconnecting the signal wire from BCM to the lamp socket (but this may result in loss of lighting function!).

An example of calculating a resistor for LED dimensions:

Resistance (R) = Voltage² / Halogen Lamp Power

For 5W lamp: R = 12² / 5 = 28.8 Ohm (use 27 Ohm, 10 W resistor)

⚠️ Attention: Ballast resistors heat up while working! Install them on metal parts of the body (for example, on the headlight mount) and use heat shrink tubing for insulation.
Where to buy resistors for blende?

Resistors can be ordered from radio stores (for example, Chip and Dip) or on AliExpress. Look for models with at least 10 watts of power and a resistance of 6-27 ohms (depending on the type of lamp).

Consequences of disabling lamp polling: pros and cons

Disabling lamp polling solves the problem of false errors, but it also has a downside. Let's look at the key implications:

Pros Cons
✅ Disappearance of annoying messages on the dashboard. ❌ You won't know about real lamp burnout (for example, a brake light).
✅ Possibility of use LED lamps no errors. ❌ There is a risk of being left without lighting on the road (for example, if a light bulb burns out).
✅ Simplified diagnostics (no false codes in BCM). ❌ Possible problems during passage technical inspection (if the lamps do not work, but the error is not displayed).

Recommendation: If you disable polling for critical lamps (brake lights, low beam), check their functionality manually regularly (for example, once a month). For headlights or fog lights, the risk is less, but still present.

💡

Disabling lamp polling does not affect their actual operation, but deprives you of notifications about faults. Always weigh the risks before deactivating a feature.

Common mistakes when disabling surveys and how to avoid them

Many owners ŠKODA Yeti encounter problems after trying to disable lamp polling. Let's look at common mistakes and ways to solve them:

  • 🔄 Reset settings BCM after power off. If the battery has been disconnected or dead, the unit can return to factory settings. Solution: Repeat the adaptation procedure.
  • 🚨 New errors appear (for example, ESP or ABS). Reason: some blocks are related to BCM via bus CAN. Solution: Reset errors in all modules.
  • 💥 Short circuit when installing resistors. Cause: Incorrect insulation or selection of a resistor with insufficient power. Solution: Use heat shrink and resistors on 10 W.
  • 🔍 Poll won't turn off despite changes in VCDS. Reason: in some firmware BCM The survey is hardwired. Solution: update the unit's firmware (experience required!).

If, after turning off polling, the lamps start blink or operate erratically, check:

  1. Quality of contacts in the socket (oxidation, play).
  2. Corresponding power of resistors (for LEDs).
  3. Settings Light Coding in BCM (adjustments may be required).

FAQ: Answers to frequently asked questions

Is it possible to disable lamp polling only for LED dimensions without affecting the others?

Yes, through VCDS The easiest way to do this is to disable polling only for channels Tagfahrlicht Links/Rechts (day moves/dimensions). B OBDeleven such fine tuning may not be possible.

After turning off the survey, the brake lights stopped working. What to do?

Most likely, you accidentally deactivated the wrong channel in BCM. Return settings Bremslicht in meaning active and check the fuses (eg F42 at 10A for brake lights in Yeti).

Will the fault light on the panel remain on after polling is turned off?

No, if polling is disabled correctly, light ! (yellow exclamation mark) will disappear. But if it continues to light, check other errors in BCM or ABS.

Is it possible to disable lamp polling through the hidden menu? ŠKODA Yeti?

No, in Yeti there is no hidden menu to disable polling (unlike some models VW). This function is only available through diagnostic equipment.

Does disabling polling affect the warranty?

Formally, yes, since you are making changes to the firmware BCM. However, in practice, dealers rarely check this parameter unless there are other complaints. We recommend returning the factory settings before visiting the service center.