Pontypridd Auto Diagnostics

25/09/2026

24/09/2026

🚨 DOUBLE TROUBLE & MISSION ACCOMPLISHED! 🚨

​What a day on the tools! We teamed up with Morgan from Riley's Repairs for a big collaboration day tackling some proper diagnostic head-scratchers across Nelson and Taffs Well.

​🔹 Job 1: 2005 Chrysler Crossfire (Nelson)
Dived deep into diagnosing the PCM and traced the issue down to confirm a full SKREEM replacement. No more guessing, just precise diagnostics!

​🔹 Job 2: Ford Kuga (Taffs Well)
This one was stuck in constant limp mode. Riley’s Repairs got to work with a complete turbo clean, and Pontypridd Auto Diagnostics stepped in to run full adaptations and coding to lock in the fix. Result? Smooth power restored and ZERO limp mode!

​Massive thanks to Morgan cracking day working together fixing customer cars in Pontypridd and the surrounding areas. We definitely need to get another link-up day in the diary soon! 🛠️⚡

​📍 Need auto diagnostics or tricky fault fixes in Pontypridd & surrounding areas? Drop us a message!

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22/09/2026

🚗 CASE STUDY: 2020 Citroën C5 Aircross in Tredegar, dead despite a brand new battery 🔧

No dash lights, no ignition, no crank. The battery had been replaced only a week earlier, but a new battery wasn't the fix, because the battery was never the problem.

🔍 The cause

A fault between the BSI (body control module) and the electronic steering column lock (ESCL) was keeping the lock/unlock modules awake. The car never went to sleep, so it kept draining the battery.

Once the voltage dropped far enough, the BSI lost contact with the steering lock (fault B181A:87), went into anti-theft lockout and cut ignition power.

📋 Also logged by the voltage drop:
🔹 B1400:64 (airbag ECU): CAN+ supply voltage signal not coherent
🔹 U1F00:00 (airbag ECU): fault not recorded in the built-in systems interface log
🔹 B1003:55 (telematics unit): secure special function fault
🔹 B1003:55 (motorised boot unit): special function incorrect or not carried out

🛠️ The fix
✅ Topdon Tornado 9000 used to hold a stable supply throughout diagnostics
✅ Checked all BSI fuses and the steering lock's mechanical operation
✅ Re-established BSI to ESCL communication and cleared the lockout
✅ Drain test confirmed the modules now go to sleep, with no more battery drain
✅ Recalibrated the powered tailgate
✅ Cleared all voltage-related faults, confirmed with a full rescan
✅ Engine and ABS: no faults

🔋 The cost of the drain

Battery tested on a Topdon BT600: 35% state of health. One week old, and permanently damaged by being repeatedly drained. We've advised replacing it now that the cause is fixed.
A new battery treats the symptom. Diagnosis finds the cause. 💡

📍 Mobile EV and vehicle diagnostics across Pontypridd, RCT, Tredegar, Rhymney and the South Wales Valleys. Message us or book at pontypridddiagnostics.co.uk

19/09/2026

Out in Caerphilly removing factory fleet speed limiters! 🔧⚡

​Ever bought an ex-fleet Ford Ranger only to find it’s holding you back on the motorway?

We hooked up the diagnostics and battery support unit to safely code out the old fleet governor.

​Pure stock power unlocked—no tuning required, just clean ECU configuration. 🚙💨

​📍 Caerphilly & Surrounding South Wales Areas

📩 DM us to unleash your ex-fleet vehicle!

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10/09/2026

AVILOO EV Battery Health Test Complete!

​Another certified EV test carried out for Miskin Van Centre!

We performed an AVILOO FLASH Battery Health Test on this Peugeot e-Partner, revealing a healthy 94.4% State of Health (SOH) with zero abnormalities detected.

​Buying, selling, or trade-checking an electric vehicle or commercial van? Get independent, certified proof of battery health with Pontypridd Auto Diagnostics.

​Get in touch today for fast, accurate EV diagnostics across Pontypridd, Miskin, and surrounding areas!

04/09/2026

🚗 Thinking of buying a used diesel, or has a seller promised "it just needs a regen"? Don't take their word for it!

​We were out in the Valleys today assessing a VW Tiguan 2.0 TDI in Wattstown, Porth. The seller initiated a forced DPF (Diesel Particulate Filter) regeneration getting temperatures over 600 °C to burn off soot.

​Here’s what most buyers miss: A forced regen burns away soot, but it does NOT remove oil ash. Once the DPF reaches its maximum ash volume, a regeneration won't save it, and you could be facing a £1,000+ replacement bill shortly after buying.

​What we check on a pre-purchase scan:

✅ Oil Ash Volume: Checks the physical remaining lifespan of the DPF.
✅ Soot Load & Differential Pressure: Confirms if the regen actually worked.
✅ Stored & Cleared Code History: Exposes hidden fault codes the seller reset before your viewing.
✅ Live Data & Full Module Scan: ABS, airbag, transmission, and engine management.

​📍 Mobile across Pontypridd & Rhondda Cynon Taf. We come to the seller so you can buy with confidence.

📱 Pre-Purchase Inspections from £45 | Diagnostic Scans from £35

💬 DM us or visit pontypridddiagnostics.co.uk to book.

28/08/2026

Upgraded the Smart Forfour with a Camecho dual mirror dash cam! Fully tucked wires and reverse trigger tapped into the tail light for a clean finish. 🚗⚡️

22/08/2026

Change of pace today no EV battery health check.

Instead!

No sound in this Land Rover Discovery 4! 🔇

​Out in Treorchy today running diagnostics on the MOST fiber optic network.

A quick loop test confirmed a corrupted audio amplifier. Replacement part is ordered and ready to fit as soon as it arrives 📦

​While on site, we also supplied, and programmed a brand-new spare key for the customer 🔑🚘

​Need diagnostics or a spare key in South Wales? Send us a DM, Call, email or a WhatsApp!

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20/08/2026

⚡ Another Tesla Model 3 Battery Health Check Completed! ⚡

​We’ve just wrapped up another AVILOO Flash Test on a Tesla Model 3 (60.5 kWh) right here in Porth! It’s clear why this remains one of the most popular EVs on the roads around RCT.

​Here are the diagnostic details from today's health check:
​Vehicle: Tesla Model 3 (60.5 kWh)
​Current Odometer: 38,779 miles
​State of Health (SOH): 90.5% (Fair Health — No Abnormalities Detected)
​Tested Energy Capacity: 55 kWh available (out of 61 kWh original capacity)
​Tested Range: 288 miles WLTP (vs. 319 miles original WLTP)
​System Diagnostics: 100% Pass across BMS, sensors, cell voltages, and vehicle communication.

​Thinking of buying or selling a used EV?

Getting an independent, certified battery diagnostic gives total peace of mind before making the deal.

​📍 Pontypridd Auto Diagnostics | Serving Porth & surrounding areas

📲 Send us a message or call today to book your EV battery health check!

​ Check

Aviloo-certified mobile EV battery health check in South Wales. Independent SOH certificate. Mobile, we come to you. From £95.