P2452 on Suzuki: How to Diagnose & Fix
Diesel Particulate Filter Pressure Sensor "A" Circuit
1 Suzuki model · 1 documented issue · 1 critical · $150-$1,500 repair
P2452 on Suzuki by model: symptoms, diagnosis and fix
The 1.9 DDiS in the SX4 is the Fiat Multijet 8V 939A engine, shared with Croma/Bravo. Same EGR cooler clogging, DPF regeneration failures, and turbo actuator wear issues as in Fiat applications. Short-trip duty cycles especially destructive — DPF cannot complete passive regen.
Common Symptoms
- DPF light
- EGR fault
- power loss
- limp mode
- black smoke
How to Fix
EGR clean: £150-£300. DPF forced regen (dealer): £80-£150 if not yet collapsed; full DPF replacement £700-£1,400. Drive at sustained 70+ mph for 20+ min monthly to enable passive regen. Many independents will EGR/DPF delete + remap — illegal in most markets.
P2452 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2452 mean on a Suzuki?
P2452 stands for "Diesel Particulate Filter Pressure Sensor "A" Circuit." This code applies to diesel vehicles and indicates a general electrical fault in the diesel particulate filter (DPF) differential pressure sensor "A" circuit. This sensor measures the pressure drop across the DPF so the computer can estimate soot load and decide when to run a regeneration cycle. A circuit fault means the computer can't trust the sensor, so it may not regenerate properly. While not an immediate breakdown, it can lead to DPF clogging over time and should be repaired to keep the emissions system working correctly. On Suzuki it is documented across 1 model: SX4.
What are the most common causes of P2452?
The most common causes of P2452 are: Faulty DPF differential pressure sensor, Wiring or connector fault in the sensor circuit, Clogged, cracked, or disconnected sensor pressure hoses, Corrosion or moisture in the connector, Soot contamination of the sensor ports, PCM/ECM circuit fault (rare). The specific cause varies by vehicle.
How much does it cost to fix P2452 on a Suzuki?
Published repair estimates on Suzuki range from $150 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P2452 on a different make?
View P2452 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.