C0269 on Chevrolet
Excessive Dump/Isolation Time
C0269 on Chevrolet vehicles indicates excessive dump/isolation time. Au7o has documented this code across 1 Chevrolet model — most commonly on Monte Carlo. This code, common on GM vehicles, sets when the ABS module commands the dump or isolation valves to release/hold brake pressure for too long (typically more than several seconds) on one or more wheels. The dump valve releases pressure to prevent wheel lockup and the isolation valve holds pressure on a circuit; excessive activation usually means the system is reacting to a wheel that is locking or to a bad wheel-speed reading. The module disables ABS, traction, and stability control and lights the warnings. The root cause is frequently a dirty/faulty wheel speed sensor or a mechanically dragging/locking brake rather than the valves themselves. Typical repair costs on Chevrolet range from $300 to $900, depending on the specific model and root cause.
Common Causes of C0269
- •Dirty or faulty front wheel speed sensor (most common)
- •Mechanically locking or dragging brake/caliper
- •Debris at the sensor/tone ring causing false readings
- •Damaged tone (reluctor) ring
- •Sticking dump/isolation solenoid valve in the ABS unit
- •Wiring/connector corrosion at a wheel sensor
- •Internal EBCM/hydraulic unit fault
C0269 on Chevrolet by Model
Chevrolet Monte Carlo(1 issue)
- ABS/EBCM Module Failure and Brake Lamp Warning2000-2007
The Electronic Brake Control Module (EBCM) mounted on the ABS hydraulic unit is prone to failure due to internal solder joint cracking from vibration and thermal cycling. When it fails, ABS, traction control, and stability control all stop functioning. The brake warning light, ABS light, and traction control light all illuminate.
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View C0269 across all makes →Frequently Asked Questions
What does C0269 mean on Chevrolet?▼
C0269 stands for "Excessive Dump/Isolation Time." This code, common on GM vehicles, sets when the ABS module commands the dump or isolation valves to release/hold brake pressure for too long (typically more than several seconds) on one or more wheels. The dump valve releases pressure to prevent wheel lockup and the isolation valve holds pressure on a circuit; excessive activation usually means the system is reacting to a wheel that is locking or to a bad wheel-speed reading. The module disables ABS, traction, and stability control and lights the warnings. The root cause is frequently a dirty/faulty wheel speed sensor or a mechanically dragging/locking brake rather than the valves themselves. On Chevrolet specifically, this code is documented across 1 model.
What causes C0269 on Chevrolet vehicles?▼
Common causes on Chevrolet: Dirty or faulty front wheel speed sensor (most common), Mechanically locking or dragging brake/caliper, Debris at the sensor/tone ring causing false readings, Damaged tone (reluctor) ring, Sticking dump/isolation solenoid valve in the ABS unit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0269 on a Chevrolet?▼
Repair costs on Chevrolet range from $300 to $900, depending on the specific model and root cause.
Which Chevrolet models have C0269 documented?▼
Au7o has documented C0269 on 1 Chevrolet model: Monte Carlo.