I’d been using the Power Probe 4 since 2020, and it was one of my go-to tools. Then it started showing some seriously bad voltage readings — 11.4V in reality, 24–30V on the screen. At $350–$400, and with me barely using its extra functions, I figured I’d give the roughly $90 Autel PowerScan PS100 a shot.
After using it in the shop, I was pretty impressed. It handles the basic power, ground, and voltage checks I use all the time, without the extra stuff I rarely touched on the PP4.
Autel PS100 vs. Power Probe 4: One Week in the Shop
This is the comparison that matters most to me.
| Tool | Autel PS100 | Power Probe 4 |
|---|---|---|
| Power / ground check | ✓ | ✓ |
| Voltage reading | ✓ | ✓ |
| Supply power | ✓ | ✓ |
| Supply ground | ✓ | ✓ |
| Advanced functions | Basic | More |
| Size / weight | Smaller / lighter | Larger / heavier |
| Work light | Good | Brighter |
| Price | Lower | Higher |
For the way I actually use a power probe, the PS100 covers the important stuff:
- Core functions: Power, ground, voltage, and power/ground output are all there.
- Advanced modes: I rarely used them on the Power Probe 4 anyway. For injector checks, I’d usually grab a NOID light instead.
- Portability: The PS100 is lighter and easier to carry around the vehicle.
- Component testing: The dedicated ground connection makes it easy to supply power or ground and see if a component works.
- What I miss: The Power Probe 4 still has better advanced testing and a brighter work light.
- Overall: For basic electrical troubleshooting, I haven’t found myself missing much.
Where the Autel PS100 Fits
| Tool | Best use | Main advantage | Main limitation |
|---|---|---|---|
| PS100 | Quick circuit checks | Power, ground, voltage, power/ground output | Fewer advanced modes |
| PP4 | Broader electrical testing | More functions | Higher cost, more complexity |
| Test Light | Basic power/ground checks | Cheap and simple | No voltage display |
| Multimeter | Detailed diagnosis | Most versatile | Slower for quick checks |
Quick take
PS100: Fast, simple electrical checks.
PP4: More capable if you use the extra functions.
Test Light: Basic and reliable, but limited.
Multimeter: Still the tool for detailed electrical diagnosis.
The Autel PS100 sits in a useful middle ground: more capable than a basic test light, much quicker for simple checks than a multimeter, and simpler than a full-featured Power Probe.
Who Should Get the Autel PS100?
I’d recommend the PS100 to:
- Automotive technicians who regularly check power and ground
- Mobile mechanics who want a compact electrical tester
- DIY users doing their own electrical troubleshooting
- Power Probe users who mainly use the basic functions
I’d look elsewhere if you regularly depend on advanced electrical testing functions. And regardless of which power probe you choose, a good multimeter still belongs in the toolbox.
For me, the Autel PS100 gets the important part right: check positive, check negative, supply power, supply ground, read voltage. it keeps the core circuit-diagnostic functions intact, drops the complexity I rarely used, and costs a lot less than the Power Probe 4.
For automotive repair shops and DIYers, the Autel PS100 is an easy recommendation if basic power-and-ground testing is what you actually need.
Contact Info:
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