P2452 on 2007-2009 Suzuki SX4 (Base, GL, GLX, AWD) — Diesel Particulate Filter Pressure Sensor "A" Circuit
1 vehicles · 1 makes · $150-$1,500 repair
How to diagnose and fix P2452: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Suzuki SX4 · 2007–2009
The 1.9 DDiS in the SX4 is the Fiat 1.9 Multijet 8V engine (Suzuki code D19AA), shared with the Fiat Sedici. 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.
Sources for this issue (3)
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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?
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.
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?
Repair costs for P2452 range from $150 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by P2452?
Au7o has documented P2452 across 1 vehicle models from 1 manufacturers: Suzuki.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.