What Does C0292 Mean?
C0292 indicates that a chassis control module (such as ABS, traction control, stability control, or body control module) has lost communication with the Powertrain Control Module (PCM/ECM) over the vehicle's Controller Area Network (CAN) bus. This communication failure prevents coordinated control between the chassis systems and engine/transmission management. The code is typically set when the chassis module does not receive expected messages from the PCM within a specified timeframe.
Safety Warning
Vehicle may not be safe to drive as critical safety systems (ABS, traction control, stability control, engine management) cannot communicate and coordinate properly. Multiple safety systems may be disabled or operating in limp mode. Immediate diagnosis and repair is strongly recommended.
Common Causes
35%
CAN bus wiring issue including open circuits, shorts to ground, shorts to power, or damaged twisted-pair wiring between PCM and chassis modules
25%
Faulty or corroded connector terminals at PCM or chassis control module causing intermittent or complete loss of communication
20%
Failed or failing Powertrain Control Module unable to transmit CAN messages properly
15%
Failed chassis control module (ABS/stability control/body control module) unable to receive or process CAN bus signals
5%
Loss of power or ground to PCM causing complete module failure and communication dropout
Diagnostic Steps
1
Step 1: Perform visual inspection of PCM and all chassis control module connectors for corrosion, bent pins, moisture intrusion, or physical damage. Check connector lock mechanisms and wire harness routing for chafing or damage points.
2
Step 2: Use scan tool to verify PCM is responding and communicating on the network. Check all other modules for communication and identify which specific chassis module is reporting the lost communication fault. Document all present and pending codes across all modules.
3
Step 3: Using a digital multimeter, measure CAN bus voltage at both PCM and affected chassis module connectors. CAN-High should read approximately 2.5V at rest (key on, engine off) and CAN-Low should read approximately 2.5V. Verify 120-ohm termination resistance across CAN-High and CAN-Low with key off and connectors disconnected.
4
Step 4: Inspect CAN bus twisted-pair wiring harness between PCM and chassis modules for continuity, proper resistance, and shorts to ground or power. Pay special attention to areas where harness passes through bulkheads, near heat sources, or moving components.
5
Step 5: Check PCM power supply and ground circuits with multimeter. Verify battery voltage at PCM power pins and less than 0.1V resistance on ground circuits. Test ignition-switched power and constant power supplies according to manufacturer specifications.
6
Step 6: If all wiring, connectors, and power supplies test good, perform functional test by substituting suspected module (PCM or chassis module) with known-good unit or have modules bench-tested. Clear codes and verify repair by monitoring real-time CAN bus communication during test drive.
Estimated Repair Cost
$150 - $2,500
Parts + labor, varies by vehicle and location
C0292 indicates that a chassis control module (such as ABS, traction control, stability control, or body control module) has lost communication with the Powertrain Control Module (PCM/ECM) over the vehicle's Controller Area Network (CAN) bus. This communication failure prevents coordinated control b...
The most common cause of C0292 (Lost Communications With PCM) is: CAN bus wiring issue including open circuits, shorts to ground, shorts to power, or damaged twisted-pair wiring between PCM and chassis modules
Typical repair costs for C0292 range from $150 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may not be safe to drive as critical safety systems (ABS, traction control, stability control, engine management) cannot communicate and coordinate properly. Multiple safety systems may be disabled or operating in limp mode. Immediate diagnosis and repair is strongly recommended.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0292 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
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