December 20, 2023

List of All OBD codes cause for each U0200 – U0299

check engine OBD OBDII DTC codes ECU PCMNot all OBDII codes cause an engine light, OBD codes or DTC (diagnostic trouble code) are stored by the ECU (Engine Control Unit) or PCM (Powertrain Control Module) to point the mechanic to the cause.  The engine light is an indicator of problems.  The engine light on its own does not provide details, but reading the stored DTC is a good pointer to where the issue is.

If a DTC is stored in your ECU, it doesn’t necessary mean that there will be an engine light.  In fact no other indicator may be present.  The engine light is typically reserved for drivability or emission problems.  If you’re a DIY person, you should invest in a good OBDII scanner, now available with bluetooth.

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OBD / OBDII DTC stored in the ECU (May be causing an engine light):

  1. Network & Vehicle Integration Codes (U0XXX – U3XXX)
    • U0100 – U0199: Communication between the vehicle’s computers
    • U0200 – U0299: Network Data

Network & Vehicle Integration Codes U0200 – U0299

    • U0200 – Lost Communication With Door Control Module “A”
      • causes: door control module, wiring, connectors, or communication.
    • U0201 – Lost Communication With Door Control Module “B”
      • causes: door control module, wiring, connectors, or communication.
    • U0202 – Lost Communication With Door Control Module “C”
      • causes: door control module, wiring, connectors, or communication.
    • U0203 – Lost Communication With Door Control Module “D”
      • causes: door control module, wiring, connectors, or communication.
    • U0204 – Lost Communication With Door Control Module “E”
      • causes: door control module, wiring, connectors, or communication.
    • U0205 – Lost Communication With Door Control Module “F”
      • causes: door control module, wiring, connectors, or communication.
    • U0206 – Lost Communication With Folding Top Control Module
      • causes: folding top control module, wiring, connectors, or communication.
    • U0207 – Lost Communication With Moveable Roof Control Module
      • No communication with the Moveable Roof Control Module.
      • causes: moveable roof control module, wiring, connectors, or communication.
    • U0208 – Lost Communication With “Seat Control Module A”
      • causes: seat control module, wiring, connectors, or communication.
    • U0209 – Lost Communication With “Seat Control Module B”
      • causes: seat control module, wiring, connectors, or communication.

  • OBD / OBDII DTC U0211-U0220

    • U0210 – Lost Communication With “Seat Control Module C”
      • causes: seat control module, wiring, connectors, or communication.
    • U0211 – Lost Communication With “Seat Control Module D”
      • causes: seat control module, wiring, connectors, or communication.
    • U0212 – Lost Communication With Steering Column Control Module
      • causes: steering column control module, wiring, connectors, or communication.
    • U0213 – Lost Communication With Mirror Control Module
      • causes: mirror control module, wiring, connectors, or communication.
    • U0214 – Lost Communication With Remote Function Actuation
      • causes: remote function actuation module, wiring, connectors, or communication.
    • U0215 – Lost Communication With “Door Switch A”
      • causes: door switch, wiring, connectors, or communication.
    • U0216 – Lost Communication With “Door Switch B”
      • causes: door switch, wiring, connectors, or communication.
    • U0217 – Lost Communication With “Door Switch C”
      • causes: door switch, wiring, connectors, or communication.
    • U0218 – Lost Communication With “Door Switch D”
      • causes: door switch, wiring, connectors, or communication.
    • U0219 – Lost Communication With “Door Switch E”
      • causes: door switch, wiring, connectors, or communication.
    • U0220 – Lost Communication With “Door Switch F”
      • causes: door switch, wiring, connectors, or communication.

  • OBD / OBDII DTC U0221-U0230

    • U0221 – Lost Communication With “Door Window Motor A”
      • causes: door window motor, wiring, connectors, or communication.
    • U0222 – Lost Communication With “Door Window Motor B”
      • causes: door window motor, wiring, connectors, or communication.
    • U0223 – Lost Communication With “Door Window Motor C”
      • causes: door window motor, wiring, connectors, or communication.
    • U0224 – Lost Communication With “Door Window Motor D”
      • causes: door window motor, wiring, connectors, or communication.
    • U0225 – Lost Communication With “Seat Motor A”
      • causes: seat motor, wiring, connectors, or communication.
    • U0226 – Lost Communication With “Seat Motor B”
      • causes: seat motor, wiring, connectors, or communication.
    • U0227 – Lost Communication With “Seat Motor C”
      • causes: seat motor, wiring, connectors, or communication.
    • U0228 – Lost Communication With “Seat Motor D”
      • causes: seat motor, wiring, connectors, or communication.
    • U0229 – Lost Communication With “Seat Motor E”
      • causes: seat motor, wiring, connectors, or communication.
    • U0230 – Lost Communication With “Seat Motor F”
      • causes: seat motor, wiring, connectors, or communication.

  • OBD / OBDII DTC U0231-U0240

    • U0231 – Lost Communication With Roof Control Module
      • causes: roof control module, wiring, connectors, or communication.
    • U0232 – Lost Communication With “Side Impact Sensor A”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0233 – Lost Communication With “Side Impact Sensor B”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0234 – Lost Communication With “Side Impact Sensor C”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0235 – Lost Communication With “Side Impact Sensor D”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0236 – Lost Communication With “Side Impact Sensor E”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0237 – Lost Communication With “Side Impact Sensor F”
      • causes:  side impact sensor, wiring, connectors, or communication.
    • U0238 – Lost Communication With “Side Impact Sensor G”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0239 – Lost Communication With “Side Impact Sensor H”
      • causes: side impact sensor, wiring, connectors, or communication.
    • U0240 – Lost Communication With Body Control Module “A”
      • causes: body control module, wiring, connectors, or communication.

  • OBD / OBDII DTC U0241-U0250

    • U0241 – Lost Communication With Body Control Module “B”
      • causes: body control module, wiring, connectors, or communication.
    • U0242 – Lost Communication With Body Control Module “C”
      • causes: body control module, wiring, connectors, or communication.
    • U0243 – Lost Communication With Body Control Module “D”
      • causes: body control module, wiring, connectors, or communication.
    • U0244 – Lost Communication With Body Control Module “E”
      • causes: body control module, wiring, connectors, or communication.
    • U0245 – Lost Communication With Body Control Module “F”
      • causes: body control module, wiring, connectors, or communication.
    • U0246 – Lost Communication With Gateway “A”
      • causes: gateway module, wiring, connectors, or communication.
    • U0247 – Lost Communication With Gateway “B”
      • causes: gateway module, wiring, connectors, or communication.
    • U0248 – Lost Communication With Gateway “C”
      • causes: gateway module, wiring, connectors, or communication.
    • U0249 – Lost Communication With Gateway “D”
      • causes: gateway module, wiring, connectors, or communication.
    • U0250 – Lost Communication With Gateway “E”
      • causes: Faulty gateway module, wiring, connectors, or communication.

OBD / OBDII DTC U0251-U0260

    • U0251 – Lost Communication With Gateway “F”
      • causes: Faulty gateway module, wiring, connectors, or communication.
    • U0252 – Lost Communication With Restraint Control Module
      • causes: Faulty restraint control module, wiring, connectors, or communication.
    • U0253 – Lost Communication With Side Restraints Control Module
      • causes: Faulty side restraints control module, wiring, connectors, or communication.
    • U0254 – Lost Communication With Side Restraints Control Module “B”
      • causes: Faulty side restraints control module, wiring, connectors, or communication.
    • U0255 – Lost Communication With Side Restraints Control Module “C”
      • causes: Faulty side restraints control module, wiring, connectors, or communication.
    • U0256 – Lost Communication With Seat Control Module “A”
      • causes: Faulty seat control module, wiring, connectors, or communication.
    • U0257 – Lost Communication With Seat Control Module “B”
      • causes: Faulty seat control module, wiring, connectors, or communication.
    • U0258 – Lost Communication With Seat Control Module “C”
      • causes: Faulty seat control module, wiring, connectors, or communication.
    • U0259 – Lost Communication With Seat Control Module “D”
      • causes: Faulty seat control module, wiring, connectors, or communication.
    • U0260 – Lost Communication With Seat Control Module “E”
      • causes: Faulty seat control module, wiring, connectors, or communication.

  • OBD / OBDII DTC U0261-U0270

    • U0261 – Lost Communication With Seat Control Module “F”
      • causes: Faulty seat control module, wiring, connectors, or communication.
    • U0262 – Lost Communication With Image Processing Module “A”
      • causes: Faulty image processing module, wiring, connectors, or communication.
    • U0263 – Lost Communication With Image Processing Module “B”
      • causes: Faulty image processing module, wiring, connectors, or communication.
    • U0264 – Lost Communication With Door Control Module “A”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0265 – Lost Communication With Door Control Module “B”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0266 – Lost Communication With Door Control Module “C”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0267 – Lost Communication With Door Control Module “D”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0268 – Lost Communication With Door Control Module “E”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0269 – Lost Communication With Door Control Module “F”
      • causes: Faulty door control module, wiring, connectors, or communication.
    • U0270 – Lost Communication With “Window Position Sensor A”
      • causes: Faulty window position sensor, wiring, connectors, or communication.

  • OBD / OBDII DTC U0271-U0280

    • U0271 – Lost Communication With “Window Position Sensor B”
      •  
      • causes: Faulty window position sensor, wiring, connectors, or communication.
    • U0272 – Lost Communication With “Window Position Sensor C”
      • causes: Faulty window position sensor, wiring, connectors, or communication.
    • U0273 – Lost Communication With “Window Position Sensor D”
      • causes: Faulty window position sensor, wiring, connectors, or communication.
    • U0274 – Lost Communication With “Window Position Sensor E”
      • causes: Faulty window position sensor, wiring, connectors, or communication.
    • U0275 – Lost Communication With “Window Position Sensor F”
      • causes: Faulty window position sensor, wiring, connectors, or communication.
    • U0276 – Lost Communication With Touchpad
      • causes: Faulty touchpad, wiring, connectors, or communication.
    • U0277 – Lost Communication With Front Display Interface Module
      • causes: Faulty front display interface module, wiring, connectors, or communication.
    • U0278 – Lost Communication With “Head Up Display”
      • causes: Faulty head-up display, wiring, connectors, or communication.
    • U0279 – Lost Communication With “Seatbelt Pretensioner A”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0280 – Lost Communication With “Seatbelt Pretensioner B”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.

  • OBD / OBDII DTC U0281-U0290

    • U0281 – Lost Communication With “Seatbelt Pretensioner C”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0282 – Lost Communication With “Seatbelt Pretensioner D”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0283 – Lost Communication With “Seatbelt Pretensioner E”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0284 – Lost Communication With “Seatbelt Pretensioner F”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0285 – Lost Communication With “Seatbelt Pretensioner G”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0286 – Lost Communication With “Seatbelt Pretensioner H”
      • causes: Faulty seatbelt pretensioner, wiring, connectors, or communication.
    • U0287 – Lost Communication With “Seatbelt Retractor Motor A”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0288 – Lost Communication With “Seatbelt Retractor Motor B”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0289 – Lost Communication With “Seatbelt Retractor Motor C”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0290 – Lost Communication With “Seatbelt Retractor Motor D”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.

  • OBD / OBDII DTC U0291-U0299

    • U0291 – Lost Communication With “Seatbelt Retractor Motor E”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0292 – Lost Communication With “Seatbelt Retractor Motor F”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0293 – Lost Communication With “Seatbelt Retractor Motor G”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0294 – Lost Communication With “Seatbelt Retractor Motor H”
      • causes: Faulty seatbelt retractor motor, wiring, connectors, or communication.
    • U0295 – Lost Communication With “Fuel Lid Motor A”
      • causes: Faulty fuel lid motor, wiring, connectors, or communication.
    • U0296 – Lost Communication With “Fuel Lid Motor B”
      • causes: Faulty fuel lid motor, wiring, connectors, or communication.
    • U0297 – Lost Communication With Trailer Brake Control Module
      • causes: Faulty trailer brake control module, wiring, connectors, or communication.
    • U0298 – Lost Communication With “Parking Aid Control Module A”
      • causes: Faulty parking aid control module, wiring, connectors, or communication.
    • U0299 – Lost Communication With “Parking Aid Control Module B”
      • causes: Faulty parking aid control module, wiring, connectors, or communication.

Why is my Engine Light on?

On-Board Diagnostic (OBD / OBDII) codes are stored within the Engine Control Unit (ECU) or Powertrain Control Module (PCM). These modules store the codes, monitor and control engine performance and emissions. When the system detects a fault or irregularity, it generates a diagnostic trouble code (DTC), which is stored in the ECU/PCM’s memory. This code can be retrieved using an OBD scanner, providing insights into issues.

What Are These Codes in my ECU?

On-Board Diagnostic (OBD or OBDII ) codes are part of a vehicle’s self-diagnostic system.  The ECU and sensors work together to produce DTCs, sometimes resulting in an engine light.  The codes generated do not always cause an engine light.  The development of OBD systems began in the 1980s, driven by increasing environmental concerns and regulations, especially in California. The California Air Resources Board (CARB) played a key role in this, mandating the first OBD systems.  OBD, introduced in the 1980s, was the first system of its kind.  The evolution of OBD technology culminated in the universal OBDII standard in the mid-1990s.  It provided basic capabilities to monitor and diagnose vehicle functions, primarily for emissions control.  OBDII, introduced in the mid-1990s, is a more advanced and standardized system.  This OBDII advanced system was mandatory for all cars sold in the United States from 1996 onwards.  OBDII offers broader diagnostics, real-time data, and standardization across most vehicles.  This made it easier to diagnose and address issues.  OBDII’s standardized diagnostic trouble codes (DTC) and connector types are much better than the earlier OBD system, making it easier to diagnosis and repair.

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