What Does C0290 Mean?
C0290 indicates that a chassis control module (such as ABS, stability control, or suspension control module) has lost communication with the Powertrain Control Module (PCM) over the vehicle's CAN bus network. This communication failure prevents proper data exchange between critical control systems, affecting integrated vehicle functions like traction control, stability systems, and drivetrain coordination. The fault is detected when expected periodic messages from the PCM are not received within specified timeframes.
Safety Warning
This is a critical fault that may disable ABS, traction control, stability control, and coordinated powertrain functions, significantly compromising vehicle safety. Vehicle should not be driven except to reach a repair facility, and extra caution is required as safety systems may not function properly.
Common Causes
35%
Damaged or corroded CAN bus wiring, connectors, or terminals between PCM and chassis modules
25%
Failed or failing Powertrain Control Module (PCM) with communication circuit faults
20%
Low battery voltage or intermittent power supply causing module reset or communication dropout
15%
Failed chassis control module (ABS/ESP/suspension module) unable to process CAN messages
5%
CAN bus termination resistor failure or network impedance issues
Diagnostic Steps
1
Perform visual inspection of all accessible wiring harnesses between the PCM and chassis modules, checking for chafing, pinched wires, water intrusion, or corrosion at connectors, paying special attention to areas near frame rails and suspension components
2
Using a digital multimeter, verify battery voltage is at least 12.4V with ignition off and 13.8-14.5V with engine running; inspect and load test battery if voltage is low; check all relevant power and ground circuits to both PCM and chassis modules for proper voltage and resistance (grounds should be less than 0.5 ohms)
3
Measure CAN bus voltage at the PCM connector with ignition on, engine off: CAN High should read approximately 2.5V and CAN Low approximately 2.5V at rest, with voltage swings between 2.5-3.5V (High) and 1.5-2.5V (Low) during communication; significant deviation indicates network fault
4
Measure resistance between CAN High and CAN Low terminals with all modules connected and ignition off; should read approximately 60 ohms (indicating proper termination); readings of 120 ohms suggest missing termination, while very low or high readings indicate short or open circuits
5
Disconnect chassis control modules one at a time and recheck communication to isolate a potentially failed module pulling down the network; monitor for return of PCM communication after each disconnection
6
If all wiring and connections test good, perform PCM and chassis module software updates per manufacturer TSBs, then substitute suspect module(s) with known-good units to confirm module failure; clear codes and verify repair with test drive monitoring live data
Estimated Repair Cost
$150 - $2,500
Parts + labor, varies by vehicle and location
C0290 indicates that a chassis control module (such as ABS, stability control, or suspension control module) has lost communication with the Powertrain Control Module (PCM) over the vehicle's CAN bus network. This communication failure prevents proper data exchange between critical control systems, ...
The most common cause of C0290 (Lost Communications With PCM) is: Damaged or corroded CAN bus wiring, connectors, or terminals between PCM and chassis modules
Typical repair costs for C0290 range from $150 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical fault that may disable ABS, traction control, stability control, and coordinated powertrain functions, significantly compromising vehicle safety. Vehicle should not be driven except to reach a repair facility, and extra caution is required as safety systems may not function properly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0290 to identify the root cause.
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Quick Info
Category
Chassis
System
Vehicle Communication Network (CAN Bus)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
