C0269 on 2000-2007 Chevrolet Monte Carlo — Excessive Dump/Isolation Time
1 vehicles · 1 makes · $300-$900 repair
Most Reported On
C0269 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2000-2007 Chevrolet Monte Carlo, with repair costs ranging from $300 to $900.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose C0269, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does C0269 mean?
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.
What are the most common causes of C0269?
The most common causes of C0269 are: 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. The specific cause varies by vehicle.
How much does it cost to fix C0269?
Repair costs for C0269 range from $300 to $900, depending on the vehicle and root cause.
Which vehicles are affected by C0269?
Au7o has documented C0269 across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.