Coil On Plug (COP) and Signal Probe

The TA204 COP and signal probe from Pico Technology is the easiest and fastest non-intrusive way to check coil-on-plug ignition coils and spark plugs.

  • Find misfires fast
  • Displays scope patterns of the secondary, faster than scoping the primary
  • Works on all automotive scopes capable of displaying ignition patterns
  • Can also be used to investigate injectors and other inductive actuators
  • Flexible design allows for easier access to hard-to-reach components
  • No batteries required

Like distributors, spark plug wires are starting to disappear from cars. With the new COP ignition systems the ignition coils are connected directly to the spark plugs — eliminating the need for the spark plug wires. With no high-voltage spark wires, a COP probe is required to be able to pick up the secondary ignition waveform.

As standard the TA204 COP probe is supplied as a kit (PP357) complete with the TA033 BNC to BNC cable in order to connect to your automotive scope.

In stock. Available for despatch.

How does it work?

The coil–on–plug and signal probe works with most COP systems; it requires no special adaptors, no foil strips, and no batteries. The Pico coil-on-plug and signal probe eliminates the need for back-probing: to use the probe simply press the probe against the coil.

Along with testing COP systems, the coil-on-plug and signal probe can also be used to obtain many other signals, including a secondary ignition waveform on conventional ignition systems.

Designed to save you time, effort and money, the coil-on-plug and signal probe is the fastest way to test both conventional coil-on-plug secondary ignition systems.

Typical Uses

Non-intrusive diagnosis is essential during the initial inspection of a vehicle and the flexible COP/ Signal Probe becomes invaluable in these scenarios. Misfires are a typical example of where the COP probe excels especially with modern multi cylinder engines and restricted access to coil units. The shaft of the signal probe can be formed into any shape in order to access coil units that may be buried under intake ducting or manifold assemblies. Once an offending cylinder has been identified, authorisation can be requested before commencing with a time consuming repair whilst safe in the knowledge the misfire has been delivered before disassembly. The COP/Signal Probe is not only confined to misfire detection:

  • COP units (including restricted access units) HT functionally check
  • HT Leads and coil towers for HT functionality
  • Injectors (Petrol/Diesel) solenoid type for an indication of operation
  • Solenoids for operation check
  • Oil control valves for operation check
  • Throttle motors for activity check
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Coil-on-plug probe Quick Start Guide 1 152 KB Apr 07 2022 Ignition accessories open

Accessories for the Coil On Plug (COP) and Signal Probe

Product Price Quantity
BNC to BNC Cable with Earth Clamp

Customer reviews

7 reviews | Add review

Ron McLeod
Coil On Plug (COP) and Signal Probe

This is my review of the new Pico secondary ignition probe. Ive had a chance to use it a few times and wondering why I put up with the old one for so long, the new probe is amazing and works great seems accurate and is not that fussy where you put it on the coil like the old one. I would recommend you buy one, I’m very impressed with it and look forward to using it on other vehicles.

dennis vandruff
Coil On Plug (COP) and Signal Probe

There are a ton of secondary pickups on the market. most of them will work with your Pico.
This newer style works extremely well. I have one that works almost as good, but it was almost twice the cost also.
So for the money, the low noise waveforms that this wand produces is a good buy.

Elijah Sumner
Coil On Plug (COP) and Signal Probe

I love this COP probe. It makes light work of hard to access coil packs that would require large amounts of component strip to test in other ways. The waveform produced is always clear and it is easy to come to the conclusion that you have a faulty ignition system component.

jerry smith
Coil On Plug (COP) and Signal Probe

This is a great tool for checking waveforms on COP.
The shielding on this tool keeps the noise from affecting
the waveform.

Mark Stammers
Coil On Plug (COP) and Signal Probe

I put this tool to work after receiving it and found it to be really good. I had had questionable reviews on the previous model, whilst looking to buy one. This works very nicely, especially as it has a flexible neck and therefore get in some of the more restricted areas. I find it useful to just leave the software setting to 50~100mv range sometimes, if the COP insulation is too strong for the standard setting.
A definite worthy choice.

Robert Burgy
Coil On Plug (COP) and Signal Probe

I received this COP probe and immediatly put it to work.
It works fantastic! unlike some of the other secondary probes on the market,
with this one, i didn’t need to find a sweet spot to get a waveform. This one
has great response anywhere on the coil. Another great product from Pico

Ahti Hinnov / Volrem Auto / Estonia
Coil On Plug (COP) and Signal Probe

Purchased this to quickly diagnose COP ignition coils but found that it’s very useful for various parts. Common rail injectors, petrol injectors and solenoid valves are just a few to mention. Very good tool for quick evaluation before deeper inspection.

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