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OBD Code C0290

Lost Communication With ABS Module

CodeC0290
DescriptionLost Communication With ABS Module
Possible CausesCAN bus failure|ABS module offline|Wiring
SymptomsABS offline|Other modules can't communicate
SystemChassis

What Does C0290 Mean?

Lost Communication With ABS Module. This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the chassis.

Code Breakdown

C = Chassis code

0 = Generic (SAE standard)

How to Fix C0290

Follow these diagnostic steps to identify and resolve the issue. Always start with the simplest checks before moving to more involved repairs.

  1. Check the battery voltage — low voltage causes widespread communication errors. Charge or replace the battery.
  2. Inspect the CAN bus wiring at the affected module for damage.
  3. Check CAN bus termination resistance (should read ~60 ohms between CAN-H and CAN-L with all modules connected).
  4. Unplug modules one at a time and re-measure termination to find a module pulling the bus down.
  5. Look for aftermarket accessories that may be tapped into the CAN bus network.
  6. Check for water intrusion in module locations.
  7. Clear codes and monitor for communication errors.

Note: These are general diagnostic guidelines. Some vehicles may have model-specific procedures. Always consult your vehicle's service manual for exact specifications and torque values. If you are not comfortable performing these steps, visit a qualified mechanic.

Frequently Asked Questions

Is C0290 serious?

Yes — C0290 is considered a high-severity code. You should have it diagnosed and repaired as soon as possible. Driving with this code active may cause further damage to your vehicle or pose a safety risk.

Can I clear C0290 myself?

You can clear any OBD-II code with a code scanner or by disconnecting the battery for 15-30 minutes. However, clearing the code without fixing the underlying problem will cause it to return — usually within one or two drive cycles. If the code triggered the check engine light, the light will come back on. Fix the root cause first, then clear the code.

How much does it cost to fix C0290?

Repair costs vary widely depending on the root cause. Some fixes are free (like tightening a gas cap) while others can cost several hundred dollars (like replacing a catalytic converter or oxygen sensor). A proper diagnosis with a professional scan tool — not just reading the code — is the first step to getting an accurate repair estimate. Many auto parts stores offer free code reading, but a thorough diagnosis usually requires a mechanic.

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