What Does C0268 Mean?
C0268 indicates the Anti-lock Brake System (ABS) module has detected an electrical fault in the hydraulic pump motor circuit. The control module found either an open circuit (broken wire or poor connection) or a short circuit (wire touching ground or power) in the pump motor wiring or the motor itself. This fault prevents the ABS/stability control system from building proper hydraulic pressure for brake modulation during ABS events.
Common Causes
35%
Damaged or corroded wiring harness connections at the ABS pump motor or control module connector
30%
Failed ABS hydraulic pump motor with open or shorted internal windings
20%
Short to ground or power in pump motor circuit wiring due to chafing or damage
10%
Failed ABS control module with damaged pump motor driver circuit
5%
Blown fuse or faulty relay in ABS pump motor power supply circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of ABS pump motor and wiring harness for obvious damage, chafing, corrosion, or loose connections. Check ABS pump motor fuse and relay in fuse box for proper operation and replace if blown.
2
Step 2: Using a digital multimeter, disconnect ABS pump motor connector and measure resistance across pump motor terminals. Typical readings should be 1-5 ohms. Infinite resistance indicates open motor windings; zero ohms indicates shorted windings.
3
Step 3: With pump motor disconnected, check for short to ground by measuring resistance from each motor circuit pin at the ABS module connector to chassis ground. Reading should be infinite (open circuit). Low resistance indicates wiring short to ground.
4
Step 4: Check pump motor power supply by measuring voltage at pump motor connector with key on. Should have battery voltage on power supply pin. No voltage indicates open circuit in wiring or failed ABS module driver circuit.
5
Step 5: If all wiring checks pass, perform resistance test on ABS module side of harness connector to verify control module pump driver circuit integrity. Compare readings to manufacturer specifications.
6
Step 6: After repairs, clear codes and perform ABS system functional test by driving vehicle above 15 mph and performing controlled ABS activation in safe environment to verify proper pump operation and no code return.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
C0268 indicates the Anti-lock Brake System (ABS) module has detected an electrical fault in the hydraulic pump motor circuit. The control module found either an open circuit (broken wire or poor connection) or a short circuit (wire touching ground or power) in the pump motor wiring or the motor itse...
The most common cause of C0268 (Pump Motor Circuit Open/Shorted) is: Damaged or corroded wiring harness connections at the ABS pump motor or control module connector
Typical repair costs for C0268 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable with normal braking function, but ABS and stability control features will be disabled, increasing stopping distances on slippery surfaces and risk of wheel lockup during emergency braking. Repair should be completed promptly, especially before driving in adverse weather conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0268 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS) / Electronic Stability Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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