What Does C1835 Mean?
The control module has detected a failure in the current sense circuit, which monitors electrical current flow through a specific actuator or subsystem. This feedback circuit allows the module to verify that commanded outputs are actually operating correctly. The driver may notice an associated system not functioning properly, along with a warning lamp.
Common Causes
30%
Current sense resistor on the control module circuit board has failed open or drifted out of specification
30%
Wiring fault in the current feedback circuit between the actuator and the control module
20%
Poor connection at the control module connector causing intermittent current sense readings
20%
Actuator or load being monitored has failed, causing abnormal current draw that the sense circuit interprets as a fault
Diagnostic Steps
1
Identify which specific subsystem the current sense circuit monitors by cross-referencing the manufacturer's service information — this code can apply to different actuators depending on the platform.
2
With the scan tool, command the associated actuator on and use a DC clamp-on ammeter on the actuator power wire to verify actual current draw matches the expected specification.
3
Check the wiring between the monitored actuator and the control module for opens, shorts, or high resistance — pay attention to connector pins on both ends for corrosion or damage.
4
Measure the voltage on the current sense feedback pin at the module connector while the actuator is commanded on — compare to the expected voltage range from the service manual.
5
If wiring and actuator test good, the current sense circuit within the module has likely failed and the module will need replacement.
Estimated Repair Cost
$100 - $900
Parts + labor, varies by vehicle and location
The control module has detected a failure in the current sense circuit, which monitors electrical current flow through a specific actuator or subsystem. This feedback circuit allows the module to verify that commanded outputs are actually operating correctly. The driver may notice an associated syst...
The most common cause of C1835 (Current Sense Circuit Failure) is: Current sense resistor on the control module circuit board has failed open or drifted out of specification
Typical repair costs for C1835 range from $100 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The safety impact depends on which actuator the current sense circuit monitors. If it controls a safety-critical system (braking, steering), the vehicle should not be driven until diagnosed. For non-critical systems, the vehicle can be driven with reduced functionality. Identify the specific subsystem before making a driving decision.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1835 to identify the root cause.
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Quick Info
Category
Chassis
System
Electronic Control System
Difficulty
Type
Manufacturer
Recommended Tools
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