C-304 Pass Rate 2026: What the Data Shows

Why There Is No Trustworthy C-304 Pass Rate Number

Candidates searching for a C-304 pass rate usually want one thing: a percentage that tells them how worried to be. Here is the honest answer. No verified pass rate for the Smart Automation Certification Alliance (SACA) C-304 Pneumatic Troubleshooting 1 microcredential has been established from the issuer's public materials. The sources reviewed for this site did not publish a pass percentage, a cohort size, or a score distribution. Nor did they establish an exact written-exam question count, timer, or passing score.

That matters because pass-rate figures circulating on forums and third-party sites are often copied from unrelated exams that happen to share a similar code. This article deliberately avoids that trap. Instead of inventing a number, it shows you what the documented evidence says about the credential, what that implies about difficulty, and how to measure your own readiness against the actual preparation scope.

If you want the broader difficulty picture without relying on an unsupported statistic, read How Hard Is the C-304 Exam? Complete Difficulty Guide 2026, and for the scoring side of the question, see C-304 Passing Score 2026: Exactly What You Need to Pass.

What C-304 Actually Is (and Is Not)

C-304 is a SACA microcredential titled Pneumatic Troubleshooting 1. O*NET's credential record describes its focus as fault diagnosis in electro-pneumatic PLC-controlled systems. The issuer's complete indexed description frames the credential around diagnosing and remedying faults, organized into four skill groups and naming fifteen specific component types.

Equally important is what it is not. It is not a fundamentals credential, and it is not the same thing as other SACA credentials in neighboring numbers. Study materials built for a different troubleshooting syllabus or a general fundamentals course will cover some overlapping ideas but will not map cleanly onto this credential's documented scope.

For a plain-language orientation to the credential, see What Is C-304 Certification? and C-304 Requirements 2026: Eligibility, Prerequisites & How to Qualify.

The Data That Does Exist

When a pass rate is unavailable, the most useful move is to inventory the facts that are documented, and be clear about what each one can and cannot tell you.

The pattern is clear: the documented material is about content scope, not outcome statistics. That tells you something useful. The credential is defined by what you can diagnose and repair, so your preparation should be defined the same way.

Where Candidates Tend to Lose Points

Without published score data, we cannot say which topics produce the lowest scores. What we can do is reason from the structure of the credential. A troubleshooting exam rewards candidates who can move between three layers: the electrical control layer (PLC outputs, solenoids, sensors), the pneumatic power layer (valves, cylinders, air preparation), and the diagnostic method that ties them together. Candidates who studied components in isolation often struggle when a scenario requires reasoning across layers.

Cross-layer faults

A cylinder that fails to extend might be a dead solenoid, a missing PLC output, a blocked flow control valve, a clogged filter starving the supply, or a mechanical problem at the cylinder itself. The skill being tested is narrowing the candidate causes efficiently, not reciting what each part does.

Instrument interpretation

Digital multimeter use and status indicators appear as their own preparation topic. Knowing that a multimeter measures voltage is not enough; you need to know what a reading means at a specific point in a circuit and what to conclude from an indicator light that is on, off, or inconsistent with the commanded state.

For a full walkthrough of how these areas fit together, see C-304 Exam Domains 2026: Complete Guide to All 5 Content Areas.

Domain-by-Domain Readiness Check

Because no official weights exist, treat the five preparation groupings as equal in importance and use them as a self-audit. The groupings below are editorial organizations of the issuer's preparation description, not an official blueprint.

If you can narrate a realistic fault and a test for every item above, you are in better shape than any pass-rate figure could tell you. For a structured way to cover this material, use the C-304 Study Guide 2026: How to Pass on Your First Attempt and keep the C-304 Cheat Sheet 2026: One-Page Review of Must-Know Facts nearby for final review.

Testing Fees and Registration Mechanics

Cost is part of the pass-rate conversation because a failed attempt can mean paying again. The documented pricing comes from one testing provider, CPI. Its Silver testing selector lists C-304 at $139 per test, and it advertises a C-304 Gold test at $175. These are CPI-specific prices. They are not universal SACA fees, and they should not be added together as a combined total.

Practical implications:

• Confirm the exact test level (Silver or Gold) you are registering for before you pay.
• Check your training provider's terms, since institutions can bundle or price testing differently.
• Ask about retake policies directly; the reviewed sources did not establish one.

The full pricing picture, including what is and is not confirmed, is covered in C-304 Certification Cost 2026: Complete Pricing Breakdown. For scheduling, see C-304 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

A Domain-Ordered Preparation Sequence

This is the one place we apply a schedule, and it is tied to how the domains depend on each other. Safety comes first because it governs everything else. Method comes before components so you have a framework to hang component knowledge on. Instruments come before the component deep-dive because they are how you test components.

Adjust the length to your background. A working maintenance technician may compress this considerably, while someone new to PLC-controlled equipment may need longer on Domains 2 and 4. For hands-on tools, see C-304 Training.

Who Values This Credential

The documented focus on fault diagnosis in electro-pneumatic PLC-controlled systems points to a clear audience: people who keep automated machinery running. That includes maintenance technicians, automation and mechatronics technicians, and line support staff in facilities where pneumatic actuation is controlled by PLCs. Employers in those settings care less about a credential's name than about whether a candidate can diagnose a stalled cylinder or a failed sensor without guesswork.

No salary or hiring statistics were established for this credential in the reviewed sources, so this article makes no earnings claims. If you are weighing whether the investment makes sense for your situation, read Is the C-304 Certification Worth It? Complete ROI Analysis 2026 and C-304 Jobs, which approach the question qualitatively.

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