Peugeot Boxer AdBlue Fault Fixed: P2047 Rodent-Chewed Wiring Loom on a 2024 Van

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Peugeot Boxer AdBlue Fault Fixed: Rodent-Chewed Wiring Loom on a 2024 Van

A nearly new 2024 Peugeot Boxer came in with a flashing emissions light and the engine light on. It had about 17,000 miles on it and was only around a year and a half old, yet it was already showing an AdBlue-related fault and a mileage countdown that could stop it restarting.

The awkward part was the timing. Although the van was under warranty, the local Peugeot dealer reportedly had a backlog of months. With only a few hundred miles left on the countdown, waiting wasn't realistic.

Why AdBlue countdowns feel like the van is holding you hostage

On many modern vans, an AdBlue system fault can trigger a countdown that limits how long you can keep driving before the vehicle refuses to restart. That forces a quick repair, even if the root cause is something simple like wiring or a sensor.

There's an argument for it, because if emissions control isn't working, the van isn't operating as designed. Still, it can feel harsh when the vehicle runs fine otherwise.

Here's the trade-off in plain terms:
AspectWhat it means in real lifeProPushes drivers to fix emissions faults quicklyConA small fault can lead to a non-start situation

if the sensor wasn't there, the van might drive normally, but the system won't allow it.

Scanning the Peugeot Boxer with a Launch X431 and finding the real fault

Diagnostics started with a Launch UK X431 Euro scan tool to see what was behind the warning lights. The scan logged multiple permanent faults, including an incorrect immobiliser fault and P2047 (control of the UREA injector), plus URA reservoir heating and low UREA solution pressure.

Permanent faults matter because they can stop the system working even after parts are replaced. So the next step was to reset and reinitialise the system, then clear codes and check live data.

The process was straightforward:

1. Read the faults (you often can't clear them unless you read them first).
2. Attempt to clear everything.
3. Watch which code refuses to clear.

Most faults cleared, but the URA injector control fault stayed. That pointed to a circuit problem, so attention shifted from parts to wiring.

The fix: replacing a missing section of AdBlue wiring

Under the van, the cause was obvious: around 12 inches of the wiring loom had been chewed away. Foxes, rats, or other rodents were the likely culprits. One reason this happens more now is that some looms use an "eco" coating (reported as soya-based), which animals seem to treat like food.

A new section of wire was made up and joined in, then protected with conduit. Instead of traditional soldering alone, solder seal wire connectors (heat shrink with solder in the middle) were used, and you could see the solder melt as it heated.

Once refitted, the repair blended in well, it looked factory.

Back in the cab, faults cleared properly and the engine started. This newer Boxer also showed an AdBlue level gauge on the dash, and the old temperature gauge wasn't visible in the same way.

Live data still showed 0 bar AdBlue tank pressure. On older models, software could misleadingly show about 4 bar even with the tank disconnected, but this 2024 model appeared to report more honestly. The target is typically 5 to 6 bar once the system pressurises.

A 10-mile test drive showed no fault codes, but the tank stayed at zero while showing "pressurisation phase". A DNOX reinitialisation was attempted (including an ignition-off wait of about 6 minutes), plus more driving, yet pressure still didn't rise and no faults returned.

Conclusion

The immediate problem, rodent-damaged wiring, was fixed and the warning lights and fault codes cleared, including the BSI fault. The remaining question is why the tank pressure stayed at zero without logging a new fault, so the next step was simple: drive it normally and only chase a new tank if the van sets a clear code. In short, this Peugeot Boxer shows how a "big" AdBlue crisis can start with a small wiring break.

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