MM-ST05 Oxygen Sensor Tester Simulator

MM-ST05 Oxygen Sensor Tester Simulator – Universal Automotive O2 Sensor Diagnostic Tool

The MM-ST05 Oxygen Sensor Tester Simulator is a professional-grade diagnostic tool used to test and simulate the operation of various oxygen (O2) sensors in automotive systems. Compatible with zirconium, titanium (1V and 5V), wideband dual-cell, heated, and unheated sensors, this unit offers fast, accurate results—whether the sensor is still installed or removed from the vehicle.

Designed for mechanics, workshops, and auto electricians, the MM-ST05 allows real-time monitoring with a bar graph display and provides instant PASS/FAIL readings. It’s the ideal tool to identify “lazy” sensors that may not trigger fault codes but still impact fuel efficiency and emissions.

Key Features

Universal Sensor Compatibility – Works with zirconium, titanium (1V/5V), wideband, and dual-cell sensors
Tests Heated & Unheated Sensors – Supports 1–5 wire sensors in all common configurations
Use On or Off the Vehicle – Flexible testing wherever it’s most convenient
Real-Time Cross Count Display – Live bar graph gives instant visual feedback
PASS/FAIL Alpha Display – Instantly know whether a sensor meets operational specs
No Setup Required – Plug in and test without complex configurations
Stand-Alone or Scanner Companion – Works independently or as a supplement to scan tools
User-Friendly Interface – Simplified controls for quick diagnostic workflow
Compact and Portable – Comes with its own protective carry case

Benefits

Saves Time in the Workshop
Forget the lengthy setup or reliance on engine codes alone. This tester provides accurate, real-time feedback without the need to run the engine or simulate driving conditions.

Identifies Hard-to-Detect Sensor Issues
Lazy or slow sensors might not trigger DTCs (diagnostic trouble codes), but they can impact vehicle performance. The MM-ST05 helps detect these faults early.

Multi-Sensor Support in One Tool
No need for multiple devices—this unit supports a wide range of sensor types, including newer wideband models and older 1-volt variants.

Ideal for Technicians at All Levels
Whether you’re a seasoned automotive diagnostician or just getting into advanced diagnostics, the MM-ST05 makes sensor testing straightforward and reliable.

Compact for Mobile Use
Take it on the road or to off-site jobs. It’s lightweight and protected in a compact carry case that fits easily into tool bags or workshop drawers.

Technical Specifications

• Sensor Types Supported: 
  • Zirconium 
  • Titanium (1V and 5V) 
  • Wideband / Dual-Cell 
  • Heated & Unheated (1 to 5 wires) 
• Functions: 
  • On-Vehicle and Off-Vehicle Testing 
  • No Programming or Setup Required 
  • Real-Time Cross Count Display (Live Bar Graph) 
  • Instant PASS/FAIL Results (Alpha-Numeric Display) 

Physical and Dimensional Properties

• Weight: 0.406 kg 
• Device Dimensions: 67 mm (W) × 34 mm (L) × 190 mm (H) 
• Carry Case Dimensions: 210 mm × 250 mm × 70 mm 

How to Use the MM-ST05 Oxygen Sensor Tester

1. Connect the Sensor – Attach the sensor wires according to the manual. This can be done on or off the vehicle. 
2. Power On the Device – No complex setup is required—just switch it on. 
3. Begin the Test – Observe the real-time cross count bar graph and wait for the alpha-numeric display to show PASS or FAIL results. 
4. Interpret Results – If a sensor fails, replace or clean it depending on the issue. For lazy sensors, confirm results with scan tool data where available. 
5. Store Safely – Pack the tester back into the supplied case when not in use.
   

Always follow correct workshop safety procedures during use.

FAQs about MM-ST05 Oxygen Sensor Tester Simulator

1. What sensors does the MM-ST05 support?
   It supports a full range including zirconium, titanium (1V and 5V), wideband, and dual-cell sensors. It also works with both heated and unheated types.
2. Can it test sensors while still installed in the vehicle?
   Yes. The unit allows on-vehicle testing, but it also works off-vehicle if the sensor has been removed.
3. Does this replace a scan tool?
   Not exactly—it complements scan tools. While scan tools check ECU outputs and codes, the MM-ST05 lets you directly test sensor performance in real time.
4. How do I know if a sensor is “lazy”?
   If the bar graph shows slow response or inconsistent cross counts and no fault codes are present, it may indicate a lazy sensor that’s affecting fuel efficiency.
5. Is the tester easy to use for beginners?
   Yes. With no setup and a clear PASS/FAIL display, it’s suitable for both professionals and technicians still building their diagnostic skills.

Order the MM-ST05 Oxygen Sensor Tester from Power Start

Upgrade your diagnostic tools with the MM-ST05 Oxygen Sensor Tester Simulator. Fast, reliable, and built to work with nearly every sensor on the market, this unit saves time and delivers results you can trust. Order now from Power Start and make sensor testing a quick, confident process in your workshop.

Note: Free shipping does not apply to very heavy items that require skids or pallets.

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