C2005 on Mazda: How to Diagnose & Fix
Right Parking Brake Actuator Circuit
1 Mazda model · 1 documented issue · $150-$900 repair
C2005 on Mazda by model: symptoms, diagnosis and fix
CX-5 trims with the electronic parking brake can throw an 'Electric parking brake malfunction' warning with the brake failing to fully release or engaging on only one side. Common causes are a failed EPB caliper actuator motor and, frequently, a bent/corroded pin in the actuator electrical connector that breaks signal continuity. The problem is often triggered after a rear brake-pad service that wasn't done in EPB maintenance/service mode, which strips the motor's gear position. Owners report stored codes for motor gear position mismatch.
Common Symptoms
- 'Electric parking brake malfunction' warning message
- Parking brake won't release or releases on one side only
- ABS/brake warning lights
- Grinding or no movement from the EPB motor
How to Fix
Always retract the EPB using the maintenance/service mode (scan tool or owner's-manual procedure) before rear pad service. Diagnose with a scanner for C2005 / C112A-type motor-position codes, then inspect the actuator connector for bent or corroded pins (a frequently overlooked fix) before condemning the motor. If the actuator motor itself has failed, replace it with the genuine Mazda unit and recalibrate. DIY actuator parts run ~$150-$350 each; dealer diagnosis + replacement typically $400-$900.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mazda KA0G-26-8EXA EPB motor/parking-brake actuatorOEMMazda KA0G-26-8EXA
Replace a side-confirmed failed rear electronic parking-brake motor Fitment/availability: Live direct dealer page identifies genuine KA0G-26-8EXA for the CX-5, priced with Add to Cart.
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Sources for this issue (3)
C2005 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C2005 mean on a Mazda?
C2005 stands for "Right Parking Brake Actuator Circuit." A chassis code, most commonly documented on Ford vehicles with an electronic parking brake, indicating the ABS or EPB control module detected a fault in the right-side parking brake actuator motor circuit. The motor is either mechanically jammed, has a wiring fault, or is not responding to apply/release commands. Symptoms include a parking brake warning light and an EPB that will not fully apply or release; service braking is normally unaffected. Sub-codes narrow it down: :11 short to ground, :12 short to battery, :13 open circuit, :15 short to battery or open, :31 no signal, :92 performance or incorrect operation. C2006 is the same fault for the left-side actuator. On Mazda it is documented across 1 model: CX-5.
What are the most common causes of C2005?
The most common causes of C2005 are: Failed right rear electronic parking brake actuator motor, Open, shorted or corroded wiring to the rear caliper actuator, Corroded or water-damaged actuator connector, Seized caliper or parking brake mechanism raising motor current, High circuit resistance from a poor ground, Low system voltage / weak 12-volt battery, Internal ABS or EPB module failure. The specific cause varies by vehicle.
How much does it cost to fix C2005 on a Mazda?
Published repair estimates on Mazda range from $150 to $900 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for C2005 on a different make?
View C2005 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.