P2202 & P2203 NOx Sensor Circuit Faults: Causes & Fix Routes
NOx sensor circuit faults • P2202 / P2203 • SCR warnings P2202 & P2203 NOx Sensor Circuit Faults: Causes & Fix Routes P2202 and P2203 usually do not start as “an AdBlue problem”. They start as an electrical or communication issue. Then your SCR system loses confidence and warnings follow. Call 07349 821 999 Book […]
AdBlue No-Start Countdown Explained: What Triggers It
Start prevented • Countdown active • What to do AdBlue No-Start Countdown Explained: What Triggers It “Start prevented in 700 miles.” “No restart in 500 miles.” This guide explains why the countdown starts, what the car is checking in the background, and how to stop it before you’re locked out. Call 07349 821 999 Book […]
AdBlue Heater Circuit Faults (P202A, P202B, P202C): Winter Failure Guide
Heater circuit faults • P202A / P202B / P202C • Winter warnings AdBlue Heater Circuit Faults (P202A, P202B, P202C): Winter Failure Guide Heater faults often show up when the weather turns. Your van might start fine today, then throw warnings tomorrow. This guide explains what the codes mean and what to check first. Call 07349 […]
Cold Weather AdBlue Faults: Why Winter Makes It Worse
Winter issues • AdBlue faults • January guide Cold Weather AdBlue Faults: Why Winter Makes It Worse AdBlue warnings often show up when the temperature drops. This guide explains why winter exposes weak points in the system, what symptoms to watch for, and how to deal with them before a no-start message appears. Call 07349 […]
AdBlue Pressure Sensor vs Pump Fault: How to Tell the Difference
U-code diagnostics • NOx comms loss • SCR warnings U029D Fault Code: NOx Sensor Communication Lost (Meaning, Causes, Fix Steps) U029D is not “a bad reading”. It’s a lost conversation between modules. Fixing the comms issue often stops the repeat AdBlue warnings. Call 07349 821 999 Book a mobile visit Mobile across Leicester, Loughborough & […]
SCR System Fault After AdBlue Refill: Why It Still Warns
Refilled AdBlue • Warning still on • What it means SCR System Fault After AdBlue Refill: Why the Warning Stays On You topped up the AdBlue. The dash still shows an SCR or emissions fault. This guide explains why refilling often doesn’t clear the warning, what the system is really checking, and what to do […]
AdBlue Warning Still On After Refill? What It Means
AdBlue troubleshooting • Warning light guide • Updated for 2026 AdBlue Warning Still On After Refill? What It Means You filled the tank. The warning stayed on. Now you are wondering if something is actually wrong. Call 07349 821 999 Book a mobile visit Mobile across Leicester, Loughborough & surrounding Midlands • Mon–Sun 09:00–20:00 One […]
NOx Sensor Fault Symptoms on Diesels: What to Look For
NOx sensor • Diesel faults • What to look for NOx Sensor Fault Symptoms on Diesels: What to Look For A failing NOx sensor can cause AdBlue warnings, limp mode, and no-start countdowns. This guide shows the early symptoms, why they happen, and how to confirm the fault before costs spiral. Call 07349 821 999 […]
AdBlue Crystallisation: Causes, Symptoms and SCR Damage
SCR fault diagnosis • injector blockage • repeat warning lights AdBlue Crystallisation: Causes, Symptoms and How to Prevent SCR Damage AdBlue crystallisation is one of the most common reasons an SCR system starts playing up. It can block the injector, upset dosing, trigger low-pressure faults, and bring the warning back even after a reset. This […]
AdBlue Fault Codes on Vans: What They Mean and How to Reset Them
If your van is showing repeated AdBlue fault codes, the main thing to know is this: clearing the warning is not the same as fixing the problem. In many cases, the code returns because the ECU still sees a live fault in the SCR system. That can lead to repeat warnings, reduced power, or a […]