December 20, 2023

List of All OBD codes cause for each C0200 – C0299

check engine OBD OBDII DTC codes ECU PCM Not 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. Chassis Codes (C0XXX – C3XXX)
    • C0100 – C0199: ABS and Traction Control System
    • C0200 – C0299: Steering and Suspension Codes

Chassis Codes C0200 – C0299

  • C0200 – Right Front Wheel Speed Sensor Malfunction
  • C0201 – Right Front Wheel Speed Sensor Range/Performance
  • C0202 – Right Front Wheel Speed Sensor Circuit Low Input
  • C0203 – Right Front Wheel Speed Sensor Circuit High Input
  • C0204 – Right Front Wheel Speed Sensor Circuit Intermittent
  • C0205 – Left Front Wheel Speed Sensor Malfunction
  • C0206 – Left Front Wheel Speed Sensor Range/Performance
  • C0207 – Left Front Wheel Speed Sensor Circuit Low Input
  • C0208 – Left Front Wheel Speed Sensor Circuit High Input
  • C0209 – Left Front Wheel Speed Sensor Circuit Intermittent
  • C0210 – Right Rear Wheel Speed Sensor Malfunction
  • C0211 – Right Rear Wheel Speed Sensor Range/Performance
  • C0212 – Right Rear Wheel Speed Sensor Circuit Low Input
  • C0213 – Right Rear Wheel Speed Sensor Circuit High Input
  • C0214 – Right Rear Wheel Speed Sensor Circuit Intermittent
  • C0215 – Left Rear Wheel Speed Sensor Malfunction
  • C0216 – Left Rear Wheel Speed Sensor Range/Performance
  • C0217 – Left Rear Wheel Speed Sensor Circuit Low Input
  • C0218 – Left Rear Wheel Speed Sensor Circuit High Input
  • C0219 – Left Rear Wheel Speed Sensor Circuit Intermittent
  • C0220 – ABS Module Malfunction
  • C0221 – Wheel Speed Sensor LF Circuit Open
  • C0222 – Wheel Speed Sensor LF Signal Missing
  • C0223 – Wheel Speed Sensor LF Signal Erratic
  • C0224 – Wheel Speed Sensor LF Circuit Short to Battery
  • C0225 – Wheel Speed Sensor LF Circuit Short to Ground
  • C0226 – ABS Module Motor Relay Circuit Open
  • C0227 – ABS Module Motor Relay Circuit Short to Battery
  • C0228 – ABS Module Motor Relay Circuit Short to Ground
  • C0229 – Drop Out of Front Wheel Speed Signals

OBD / OBDII DTC C0230 – C0259

  • C0230 – Rear Wheel Speed Signal Missing
  • C0231 – Rear Wheel Speed Signal Erratic
  • C0232 – Rear Wheel Speed Signal Circuit Open
  • C0233 – Rear Wheel Speed Signal Circuit Short to Battery
  • C0234 – Rear Wheel Speed Signal Circuit Short to Ground
  • C0235 – Rear Wheel Speed Sensor Circuit Open
  • C0236 – Rear Wheel Speed Sensor Circuit Short to Battery
  • C0237 – Rear Wheel Speed Sensor Circuit Short to Ground
  • C0238 – Wheel Speed Mismatch
  • C0239 – Wheel Speed Signal Missing/Mismatch
  • C0240 – Wheel Speed Sensor Range/Performance
  • C0241 – EBCM Control Valve Circuit
  • C0242 – PCM Indicated TCS Malfunction
  • C0243 – PWM Delivered Output Fault
  • C0244 – Pulse Width Modulation Delivered Output Fault
  • C0245 – Wheel Speed Sensor Frequency Error
  • C0246 – EBCM Traction Control Activation Signal
  • C0247 – Pump Motor Circuit Open/Shorted
  • C0248 – Brake Control Signal Mismatch
  • C0249 – Driveline Disengage Input Fault
  • C0250 – Brake Lamp Switch Circuit
  • C0251 – Brake Lamp Switch Circuit Short to Battery
  • C0252 – Brake Lamp Switch Circuit Short to Ground
  • C0253 – Hydraulic Brake Booster Motor Circuit Failure
  • C0254 – Hydraulic Brake Booster Motor Circuit Open
  • C0255 – Hydraulic Brake Booster Motor Circuit Short to Battery
  • C0256 – Hydraulic Brake Booster Motor Circuit Short to Ground
  • C0257 – Traction Control Signal Malfunction
  • C0258 – Return Pump Circuit Failure
  • C0259 – Hydraulic Brake Booster Solenoid Circuit Failure

OBD / OBDII DTC C0260 – C0299

  • C0260 – Hydraulic Brake Booster Solenoid Circuit Open
  • C0261 – Hydraulic Brake Booster Solenoid Circuit Short to Battery
  • C0262 – Hydraulic Brake Booster Solenoid Circuit Short to Ground
  • C0263 – Solenoid Valve Relay Circuit Open
    • causes: Faulty solenoid valve relay, wiring or connector issues, ABS control module.
  • C0264 – Solenoid Valve Relay Circuit Short to Ground
    • causes: Short circuit, faulty solenoid valve relay, wiring.
  • C0265 – EBCM Relay Circuit Malfunction
    • causes: Faulty EBCM relay, wiring or connector issues, EBCM.
  • C0266 – EBCM Relay Circuit Open
    • causes: Open circuit, faulty EBCM relay, wiring or connector.
  • C0267 – EBCM Relay Circuit Low
    • causes: Short to ground, faulty EBCM relay, wiring.
  • C0268 – EBCM Relay Circuit High
    • causes: Short to power, faulty EBCM relay, wiring.
  • C0269 – Excessive Dump/Isolation Time
    • causes: ABS hydraulic problems, ABS control module.
  • C0270 – Excessive Dump/Isolation Time
    • Common causes: Same as C0269.
  • C0271 – EBCM Malfunction
    • causes: Faulty EBCM, wiring or connector.
  • C0272 – Brake Fluid Pressure Sensor Circuit Malfunction
    • causes: Faulty brake fluid pressure sensor, wiring or connector.
  • C0273 – Brake Fluid Pressure Sensor Circuit Low
    • causes: Short to ground, faulty sensor, wiring.
  • C0274 – Brake Fluid Pressure Sensor Circuit High
    • causes: Short to power, faulty sensor, wiring.
  • C0275 – Brake Fluid Pressure Sensor Circuit Intermittent
    • causes: Intermittent electrical connections, faulty sensor, wiring.

OBD / OBDII DTC C0276 – C0289

  • C0276 – Brake Pressure Sensor Calibration Fault
    • causes: Incorrectly calibrated sensor, sensor malfunction.
  • C0277 – Brake Pressure Sensor Circuit Range/Performance
    • causes: Faulty sensor, wiring.
  • C0278 – Brake Pressure Sensor Circuit Malfunction
    • causes: Faulty brake pressure sensor, wiring or connector.
  • C0279 – Powertrain Configuration Not Valid
    • causes: Incorrect vehicle configuration, ABS control module.
  • C0280 – Brake Pedal Position Sensor Circuit
    • causes: Faulty brake pedal position sensor, wiring or connector.
  • C0281 – Brake Switch Circuit
    • causes: Faulty brake switch, wiring or connector.
  • C0282 – Brake Indicator Lamp Circuit Failure
    • causes: Faulty brake indicator lamp, wiring or connector.
  • C0283 – Traction Switch Circuit
    • causes: Faulty traction control switch, wiring or connector.
  • C0284 – EBCM Control Circuit Malfunction
    • causes: Faulty EBCM, wiring or connector.
  • C0285 – EBCM Control Circuit Low
    • causes: Short to ground, faulty EBCM, wiring.
  • C0286 – EBCM Control Circuit High
    • causes: Short to power, faulty EBCM, wiring.
  • C0287 – Delivered Torque Circuit
    • causes: Faulty torque delivery control system, wiring or connector issues, powertrain control module (PCM).
  • C0288 – Brake Warning Lamp Circuit Failure
    • causes: Faulty brake warning lamp, wiring or connector.
  • C0289 – Brake Warning Lamp Circuit Open
    • causes: Open circuit, faulty brake warning lamp, wiring or connector.

OBD / OBDII DTC C0290 – C0299

  • C0290 – Lost Communication With Brake System Control Module
    • Issue: Lost communication with the brake system control module.
    • causes: Communication issue, faulty brake system control module, wiring or connector.
  • C0291 – Lost Communication With Powertrain Control Module
    • causes: Communication issue, faulty PCM, wiring or connector.
  • C0292 – Lost Communication With Vehicle Dynamics Control Module
    • causes: Communication issue, faulty vehicle dynamics control module, wiring or connector.
  • C0293 – Lost Communication With Traction Control Module
    • causes: Communication issue, faulty traction control module, wiring or connector.
  • C0294 – Lost Communication With Gear Shift Module
    • causes: Communication issue, faulty gear shift module, wiring or connector.
  • C0295 – Multiple Faults on One Wheel Circuit
    • causes: Multiple sensor or circuit issues on the same wheel, wiring problems, ABS control module.
  • C0296 – Lost Communication With Steering Angle Sensor Module
    • causes: Communication issue, faulty steering angle sensor, wiring or connector.
  • C0297 – Vehicle Configuration Mismatch
    • causes: Incorrect vehicle configuration settings, ABS control module.
  • C0298 – Powertrain Control Module Indicated Traction Control Malfunction
    • causes: Traction control system issue, faulty PCM, wiring or connector.
  • C0299 – Powertrain Control Module Requests MIL Illumination
    • causes: Issue requiring MIL illumination, faulty PCM, 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.