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Havenholt Diagnostic Code Reader with Live Data

£234.95 £69.95 Save 70%
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NOTICE: This product is one of our bestsellers and is already sold out in our physical store. If the “ADD TO BAG” button still works, it means the product is still in stock online in limited quantities.

Check Engine Issues Faster with This Diagnostic Code Reader

The check engine light won't stop glowing and you're completely stuck guessing what's wrong. You're dreading another expensive trip to the shop just to hear what the problem is. With this diagnostic code reader, you check engine codes at home, clear warning lights after repairs, or monitor live sensor data before issues get worse.

This code reader plugs directly into your car's diagnostic port under the dashboard. The screen shows trouble codes within seconds after you turn the key to the on position. It reads engine data, oxygen sensor values, and fuel system status while your car runs.

It works with cars, trucks, and SUVs made after 1996 that have the standard diagnostic port. The screen displays live readings for engine speed, coolant temperature, and fuel trim values. Powers straight from the diagnostic port with no batteries needed.

The reader stores freeze frame data showing exact conditions when a code triggered. It supports five communication protocols covering most vehicle makes and models. The built-in code library explains what each trouble code means and points you toward the affected system.

  • LIVE DATA MONITORING: Watch real-time engine speed, coolant temperature, oxygen sensor voltage, and fuel system status while your vehicle runs during diagnostics.

  • READ AND CLEAR CODES: Pull diagnostic trouble codes from your engine computer and clear warning lights after completing repairs or maintenance work successfully.

  • FREEZE FRAME DATA: Review stored snapshots showing exact sensor readings and conditions at the moment a trouble code first triggered in your system.

  • FIVE PROTOCOL SUPPORT: Communicates through CAN, J1850 PWM, J1850 VPW, ISO9141, and KWP2000 protocols covering most vehicles from 1996 onward across different manufacturers.

  • OXYGEN SENSOR MONITORING: Track upstream and downstream oxygen sensor voltage and response times to diagnose fuel mixture problems and catalytic converter performance issues.

  • PORT POWERED OPERATION: Draws power directly from your vehicle's diagnostic port eliminating the need for batteries, chargers, or external power sources during use.

  • 1996 AND NEWER COMPATIBILITY: Works with most cars, trucks, and SUVs manufactured after 1996 equipped with standard diagnostic ports for emissions and engine monitoring.

DIAGNOSTIC CODE READER SPECS

  • Compatibility: 1996 And Newer

  • Screen Type: LCD Display

  • Functions: Read Codes, Clear Codes, Live Data

  • Protocols: CAN, J1850 PWM, J1850 VPW, ISO9141, KWP2000

  • Power Source: Diagnostic Port

PACKAGE INCLUDES:

  • 1 x Diagnostic Code Reader

  • 1 x User Manual
4.7 (19.342)
Jack Turner

Confirmation came through straight away, then another email when it was sent. Tracking worked and the parcel arrived when they said it would. Nice and straightforward

Benjamin Foster

Nothing missing and no surprises when I opened the parcel. What turned up matched what I’d seen on the website

Hannah Lewis

Had a look around before buying and this was a fair bit cheaper. Arrived as expected too, so happy with that.

Sophie Bennett

I emailed before ordering because I couldn’t work out which option I needed. Got a proper reply explaining the difference, rather than just a link back to the page I’d already read. Might seem a small thing but it helped me decide. Placed the order that evening and I’m happy with what arrived.

Harry Collins

My first order was only a small one a few months back. That went well, so I checked here when I needed something else. Different sort of purchase this time but everything was just as straightforward. Saved me another evening of looking around!

Daniel Thompson

Ordered Sunday evening and it was here Tuesday morning. Wasn’t expecting that, especially ordering over the weekend

Charlotte Brooks

All arrived, all good 😊

Amelia Scott

Entirely my mistake, I picked the wrong option and only noticed when the confirmation came through. Sent an email and they managed to change it before dispatch. Very relieved I didn’t have to deal with returning it afterwards!

George Wilson

Bought it in the sale. Happy with what I paid and it’s what I was after, which is the main thing.

Grace Mitchell

Hadn’t heard of Havenholt before and wasn’t sure about ordering from somewhere new. Only bought one thing to start with. There was a short wait for dispatch, but they kept me updated and everything arrived as described. Happy with the purchase and I’d be comfortable ordering again.

Emily Carter

There was a mix-up with my order so I had to get in touch. Sent a photo over and they explained what would happen next. Didn’t have to keep repeating myself to different people, which I really appreciated. All sorted now

Samuel Reed

They didn’t have the one I wanted when I went into the shop, but suggested checking online. Managed to order it on the website later that day. Would have preferred to take it home there and then, but this worked out fine.

Havenholt Diagnostic Code Reader with Live Data
Havenholt Diagnostic Code Reader with Live Data
£234.95 £69.95

Information

Our policies

Customer Support

Company name: Havenholt LTD

Address: St Andrew's Street, Cambridge CB2 3BJ, United Kingdom

Email: support@havenholtsoho.com

Phone: +44 1223 302601

Customer Service Hours: 
Mon–Fri: 09:00 am–05:00 pm
Sat & Sun: Closed

Response time: Within 24 hours

© 2026 Havenholt

OBD2 Scanner – Car Diagnostic Code Reader with Live Data