C2005: How to Diagnose & Fix — Right Parking Brake Actuator Circuit
2 vehicles · 2 makes · $150-$900 repair
How to diagnose and fix C2005: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Mazda CX-5 · 2016–2020
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.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
Land Rover Range Rover Sport · 2014–2022
JLR communications for specified 2014-2020 Range Rover Sport vehicles document a Park Brake Needs Calibration warning, temporary failure to release, EPB warnings and actuator-stuck DTCs C2005-71, C2006-71, C2007-72 and C2008-72. They do not establish road salt, connector corrosion, motor burnout, auto-hold impact or a universal one-motor-per-caliper failure across 2014-2022.
How to Fix
Secure the vehicle if the parking brake will not apply or release, record the warning and DTCs, and follow the current VIN-specific JLR EPB diagnostic and calibration procedure. Do not replace an actuator motor or caliper or apply grease from this page; the fault must be isolated first and no universal retail part is linked.
Sources for this issue (1)
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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?
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.
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?
Repair costs for C2005 range from $150 to $900, depending on the vehicle and root cause.
Which vehicles are affected by C2005?
Au7o has documented C2005 across 2 vehicle models from 2 manufacturers: Land Rover, Mazda.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.