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Autopapyrus · Honda Vezel 1.5 LEB (2019)
https://autopapyrus.com/guides/honda/vezel/reading-trouble-codes-via-obd-ii/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Honda Vezel 1.5 LEB (2019): Reading Trouble Codes via OBD-II

The Vezel with the 1.5 LEB engine is a hybrid (Atkinson-cycle i-VTEC with electric motors), so the car has an OBD-II system with a 16-pin connector under the driver's side dash. A basic scan tool reads only engine and emissions-related codes. Codes for the hybrid system, ABS, SRS, transmission and other modules are available only with a scan tool that supports Honda.

DifficultyEasy Time10-20 minutes Steps12

Diagram: where the OBD-II connector is under the dash on the left

View from below, driver's left1OBD-II connector2Lower edge of the dash3Steering column4Landmark: recess at lower left5Floor with matConnector view: 2 rows of 8Tap to enlarge
  1. 1OBD-II diagnostic connector (16 pins): hangs under the lower dash edge on the left. Usually visible without disassembly; plug the scanner in until it clicks, no force.
  2. 2Lower edge of the instrument panel: look for the connector right under it, on the left. If a cover is in the way, shine a flashlight from below.
  3. 3Steering column: the connector is to its left, below the column.
  4. 4Landmark at lower left under the dash: the recess below the connector helps you find the spot.
  5. 5Floor at the driver's feet with mat: look up at the connector from below.

Part

№Part
01 Not required (for checking, use a scan tool with Honda support: a good-quality ELM327 adapter, YOUCANIC, Launch, Autel)

Tools

3
  • OBD-II scan tool (preferably multi-brand or with Honda support)
  • smartphone or tablet for Bluetooth/Wi-Fi adapters
  • pen for writing down codes

Step by step

12 steps
  1. Turn off the engine and set the parking brake. Park the car on level ground. On a hybrid, "engine off" means the READY indicator is not lit on the instrument panel.
  2. Find the 16-pin diagnostic connector. It is under the dash on the left, on the driver's side, below the steering column. It is usually visible without removing any parts. If a plastic trim piece is in the way, shine a flashlight up from below.
  3. Plug in the scan tool or adapter until it clicks. Do not use force: the pins are thin and bend easily.
  4. Turn the ignition on without starting the engine. The Vezel has a START/STOP button: press it once without pressing the brake pedal. The gauges will light up, but the READY indicator should not come on.
  5. Turn on the scan tool. In the menu, select Diagnostic or Scan and choose the Honda make. If the scan tool offers VIN detection, use it. Otherwise, select the Vezel model and the year 2019 manually.
  6. Select a quick scan of all modules (Quick Scan) if the scan tool supports it. If not, read the modules one by one: engine/hybrid system (ECM/PCM), transmission, ABS/VSA, SRS, body. Cheap adapters without Honda support will see only engine and emissions codes.
  7. Select Read Codes. Write down or photograph each code (for example, P0420) and its status: stored, pending or permanent. If your scan tool can, save the freeze frame data: it shows the engine operating conditions at the moment the fault occurred.
  8. Decode the code. The first letter shows the system: P is powertrain (engine and transmission), C is chassis, B is body, and U is the network (communication between modules). P0xxx codes are generic for all makes, while P1xxx codes are Honda-specific. Examples from Honda practice: P0300 is random/multiple cylinder misfire, P0420 is catalyst system efficiency below threshold, and P1259 is a VTEC system malfunction.
  9. Do not erase codes until you have identified and fixed the cause. Otherwise you will lose diagnostic data, and if the fault is real, the code will come back. The scan tool may refuse to erase a code while the problem is still present. This is normal.
  10. After the repair, select Erase Codes or Clear Codes in the scan tool menu. Turn the ignition off, wait 10-15 seconds, turn it on again and re-read the codes: the memory should be empty.
  11. Do not erase codes by disconnecting the battery or pulling fuses. On a hybrid, this causes other modules to lose their settings. Use the scan tool's erase function instead.
  12. Turn the ignition off (press START/STOP again without the brake), wait for the gauges to turn off, and only then disconnect the scan tool. Check that the Check Engine light behaves normally: it should go out after the codes are erased. If it comes back on, the cause has not been fixed.

Common mistakes and warnings

  • If the list includes codes for the high-voltage hybrid system (battery, inverter, electric motor), ABS codes, SRS (airbag) codes or brake system codes, do not try to repair them yourself without experience
  • Take the car to a repair shop
  • The high-voltage orange cables and hybrid components can be lethal: do not disconnect or open them without shutting down the high-voltage circuit (service plug) and wearing 1000 V insulated gloves
  • A 2019 car with the LEB engine is a hybrid, so ordinary cheap adapters will not show all faults
  • If the light comes back after you erase the codes, the cause is still there