By iCarsoft Official Store Technical Team, Automotive Diagnostics Editors · Updated September 23, 2026 · OEM technical references checked
Quick Answer
The C0019 code means left rear outlet control. It does not prove a seized caliper or failed wheel-speed sensor. Save the scan, identify the exact architecture, and test the physical and electrical paths before selecting a repair.
What Does the C0019 Code Mean?
The C0019 code means Left Rear Outlet Control. It names a monitored result, not a guaranteed failed part. The reporting module, suffix and companion faults determine the relevant test branch.
The outlet branch participates in pressure reduction during conventional ABS modulation. The code identifies its control problem, while the exact electrical and internal tests are defined by the manufacturer. It should not be translated into a claim that the left-rear wheel is mechanically locked or that a pressure value is necessarily too high.
C0019 and C001A must not be treated as synonyms. The first names outlet control; the second names hydraulic release taking too long. A repair that addresses a mechanical drag symptom has not necessarily resolved the control fault, and a clean electrical check has not necessarily explained the drag.
For the 2023 Outlander PHEV, Mitsubishi’s GST table pairs C0019 with C104E-04 and the left-rear ABS OUT valve. Keep that model-specific alias separate from the standardized base code and from diagnostic text used by other brake controllers.
An outlet-control warning and an observed left-rear dragging brake may coexist. A workshop should preserve both observations, inspect the wheel-end condition safely and follow the complete control-circuit tree. Replacing the caliper from the warning alone would leave an untested hydraulic-unit connection or output branch. This is an illustrative decision, not a reported repair.
Save the full module wording and suffix before clearing; they can change the test path.
Separate C0019 from adjacent fault families
| Code | General description | Key distinction |
|---|---|---|
| C0019 | Left Rear Outlet Control | Control-path result. |
| C0018 | Left Rear Inlet Control | Same corner, different valve role. |
| C001A | Left Rear Hydraulic Release Too Long | Different timing/response criterion. |
| C001D | Right Rear Outlet Control | Opposite rear corner. |
Record the complete C0019 description. The suffix, reporting module and companion faults can change the diagnostic path. Use the manufacturer's full wording and test procedure for the exact vehicle.
C0019 Symptoms and Likely Causes
C0019 symptoms depend on fault status and the fallback strategy. Record what the driver and modules reported. A symptom list is not a parts list.
Compare current and history faults with the original conditions. Test a suspected shared cause rather than assuming every companion code needs a separate part.
ABS or stability warnings may appear while ordinary braking still feels familiar. Treat function availability as unverified until diagnosed.
Note whether the fault returns during startup checks or later operation. Its actual confirmation conditions are vehicle-specific.
Heat, drag or pulling must be investigated if reported; none is established merely by reading C0019.
A cluster can indicate a shared condition or a controller fallback. It is not evidence that several separate valves failed simultaneously.
Practical cause-checking order
- Complete fault identity: Confirm the outlet-control suffix and module; do not begin with the neighboring release-time procedure.
- Shared supply and connection: Check common actuator supply, ground, protection and terminal condition before selecting an individual valve or module.
- Electrical control evidence: Investigate the control path using the exact electrical/actuator test the manufacturer specifies, not a generic resistance number.
- Physical response evidence: Keep any actual wheel-end or hydraulic restriction as a separate evidence branch that needs an approved physical test.
- Module and service information: Consider internal unit faults, applicable software or setup only after earlier tests have narrowed the cause.
Did C0019 appear after recent brake, battery, harness or hydraulic-unit service? Recheck the documented connections, parts and setup steps affected by that work. Record battery and software history; a post-repair code does not prove the new part is defective.
How Serious Is C0019, and Can You Drive?
An ABS or stability warning needs prompt professional diagnosis even when the pedal seems normal. Do not assume emergency braking assistance remains available. If pedal effort or travel changes, braking pulls, a wheel drags, fluid leaks or a red brake warning appears, stop safely and arrange recovery. No safe driving distance can be inferred from the code.
Record brake warnings, pedal changes, fluid loss and recent service. Do not induce wheel slip or emergency braking to test assistance on public roads; warning-state assessment comes before any functional verification.
Stop and arrange a tow if pedal feel changes, stopping is impaired, fluid leaks, a wheel drags or a red brake warning appears.
Brake circuits can retain pressure, and electrically controlled brakes can operate unexpectedly. Secure the vehicle and follow the exact shutdown, isolation and pressure-release procedure before touching hydraulic components. Never release a pipe to investigate a hot or dragging wheel, apply battery power to a valve, or trigger ABS on a public road as a diagnostic experiment.
How to Diagnose C0019 in the Right Order
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Save outlet-control and companion records
Capture the full module report, suffix and current/history state. Record warning lamps and recent repairs before disconnecting the battery or clearing anything. Preserve when the fault was first seen and whether brake behavior changed at the same time.
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Identify the left-rear outlet branch
Use the vehicle-specific hydraulic diagram and brake-controller information. Distinguish the left-rear outlet valve from the inlet path, wheel-speed input and parking-brake actuator. The physical proximity of those systems does not make their diagnostic routines interchangeable.
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Test shared supply and connector integrity
Inspect accessible harness and unit connections after the required shutdown. Measure feeds and grounds using the prescribed load and test points. Where multiple valve faults are stored, investigate a common electrical cause before assuming several component failures.
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Follow the complete outlet subfault procedure
Run the OEM procedure for the full suffix. Available scan data can support the sequence, but do not assume every controller exposes valve feedback. Use approved electrical testing and authorized active tests only when the manual and tool coverage support them.
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Check any drag or pressure complaint safely
If a wheel is hot or drags, stop further operation and obtain professional inspection. Distinguish a control fault from a caliper, hose or other hydraulic condition through the specified physical checks. Do not loosen brake fittings to perform an improvised release test.
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Verify the repaired control and brake system
Repair only the demonstrated branch. Complete required bleeding, setup and stationary safety checks before any road verification. Reproduce the approved confirmation conditions, save the final scan and confirm that the original physical complaint has also been resolved.
Specifications are vehicle-specific. Use the exact VIN specifications, approved test points and required operating state. No generic value or drive cycle can replace the applicable procedure. Manufacturer examples here do not establish specifications for other applications.
C0019 Repairs and Cost Planning
The correct C0019 repair follows the failed test. Wiring, a physical repair, a proven component, software and controller work are different outcomes. Do not replace an assembly from the generic code alone.
Recheck installation and required setup after repair. When a repair opens the hydraulic system, plan the required bleed and verification procedure before work starts. A parking-brake service mode is not a substitute for hydraulic bleeding or ABS fault confirmation.
Ask the shop to name the failed branch and the measurement supporting each proposed repair.
Authorize diagnosis before parts while the cause remains uncertain.
| Possible path | Quote basis |
|---|---|
| Repair a connector, feed or ground after its test fails | VIN-specific quote |
| Repair the proven hydraulic or mechanical brake fault | VIN-specific quote |
| Replace the confirmed component using the VIN-specific parts procedure | VIN-specific quote |
| Complete required bleeding, initialization and brake verification | VIN-specific quote |
These are alternative repair paths, not prices to add together. Request a VIN-specific quote separating diagnosis, parts, labor, fluids, taxes, required setup and verification. Ask which failed test supports the proposed repair and whether warranty coverage applies.
Using iCarsoft CR Eagle P for C0019
On a supported vehicle, iCarsoft CR Eagle P can retrieve accessible module faults, save available freeze frame, display ECU-provided live data and create a diagnostic report. For C0019, preserve the original evidence and compare related modules before clearing an erasable record.
Compare available brake-controller records before and after repair. The report supports diagnosis but cannot replace the OEM physical and functional checks.
Preserve the left-rear outlet control evidence
iCarsoft CR Eagle P
Review supported codes and relevant live data together. Confirm the exact VIN, controller access, PIDs and any requested active test with iCarsoft before purchase; generic product capabilities do not guarantee a C0019-specific function.
Check current CR Eagle P price and availabilityCheck CR Eagle P compatibility by VINThe official product page describes supported full-system diagnostics, available live data, freeze frame and diagnostic reports; exact controller coverage and active tests depend on the VIN and software. Confirm the requested function by VIN before purchase. Follow OEM prerequisites and stop for abnormal operation.
Know the measurement boundary. Scan data describes ECU-provided information; it does not directly prove the physical condition of the left-rear outlet control. Where required, use the specified electrical test equipment and, only where required, approved brake-pressure equipment and compare reported values with the relevant measured evidence.
Verify the C0019 Repair
After repair, verify connectors, harness clearance, setup and controller supply. Save post-repair findings, then clear only erasable records through the approved procedure. Battery disconnection is not a repair.
Run the manufacturer's applicable verification conditions in a safe workshop or route. Compare the original operating state with current data for the left-rear outlet control, and check current and pending faults in related modules. One clean start or idle period does not prove that every conditional monitor has completed.
Compare the original and final scans, including fault status, operating conditions and required setup. Record whether the monitor completed and whether the original event returned.
If C0019 returns, compare its suffix, status, failure order and operating conditions with the saved baseline before replacing another part. Revisit the failed branch and inspect anything disturbed. Confirm the prescribed brake-system verification separately from code clearing.
Stored and Active brake-control faults require different decisions. Preserve the original record and follow the OEM confirmation procedure. A cleared display does not prove restored assistance or safe braking.
Related Left-Rear Outlet Control Code Guides
Use related-code pages to compare monitor families, not to merge repairs. A nearby code can share a component, circuit, fluid path or operating condition, but its diagnostic conclusion still depends on its own status, suffix and test evidence.
C0019 Frequently Asked Questions
Does the C0019 code mean the named component is bad?
No. C0019 describes left rear outlet control, not a confirmed part. It also does not prove a seized caliper or failed wheel-speed sensor. Use the OEM test sequence to distinguish the circuit, load and controller before replacing parts.
What should I check first for C0019?
Save every module's codes and freeze frame before clearing. Confirm the full definition, suffix and VIN architecture. Then inspect recent brake, battery, harness or hydraulic-unit service, connectors and shared supplies. Those facts determine whether the next test needs the specified electrical test equipment and, only where required, approved brake-pressure equipment or a manufacturer-specific functional procedure.
Can I drive with the C0019 code?
An ABS or stability warning needs prompt professional diagnosis even when the pedal seems normal. Do not assume emergency braking assistance remains available. If pedal effort or travel changes, braking pulls, a wheel drags, fluid leaks or a red brake warning appears, stop safely and arrange recovery. No safe driving distance can be inferred from the code.
Why did C0019 return after a part was replaced?
The replaced part may not have belonged to the failed branch. Compare full code identity and test results, including shared supply, connector condition and any separately documented wheel-end drag.
What should a C0019 repair estimate include?
Ask for the failed-test evidence and a VIN-specific breakdown of diagnosis, parts, labor, taxes, required setup and verification. A code alone cannot establish the repair price.
Can CR Eagle P diagnose and clear C0019?
On a supported vehicle, CR Eagle P can organize available faults, freeze frame, live data and reports, and can clear erasable records after repair. Confirm exact ECU coverage. It cannot establish safe braking from an erase command or replace physical measurements for the left-rear outlet control.
The iCarsoft Official Store Technical Team maintains the store's fault-code library. This guide organizes published manufacturer evidence and verified product information; it does not document a hands-on test of a particular vehicle or claim an individual engineer's review.
Technical and cost references
- NHTSA DOT HS 812 574 — Hydraulic Braking System Appendices, Appendix K. Selected standardized chassis-code descriptions; not a VIN-specific test procedure.
- Mitsubishi TSB-23-35-002 — 2023 Outlander PHEV service manual revision. GST-to-OEM brake-control mapping for the named model only.
Product information: Official iCarsoft CR Eagle P page.
Editorial note: General diagnostic education, not a substitute for the owner's manual, current VIN-specific service information or professional inspection. Test limits, procedures, coverage and costs vary. Related articles provide context; apply only the specifications and repair procedures that match the vehicle. No universal failure rate, repair price or outcome is implied.
