ModerateAffected: 2013-201730,000–80,000 miles

Ford Fiesta Mk7 1.5 TDCi 75bhp — DPF Blockage and Regeneration Failure

The 1.5 TDCi diesel Fiesta is commonly used for short urban trips — exactly the wrong usage for a DPF-equipped car. Blocked DPF is the number one complaint.

Severity

Moderate

DIY Difficulty

Moderate

Est. Cost

£150–£1200

OBD Codes

P2452P2453P0401

Component Diagram

DPF

Typical layout and location for the DPF assembly.

Reference Illustration

Symptoms

DPF warning light (orange/amber)
Reduced power / limp mode
More frequent 'regeneration' motorway drives needed
Excessive fuel consumption
Black smoke from exhaust
P2452 or P2453 fault code

Root Cause

DPF regeneration requires sustained high exhaust temperatures (above 550°C), only achieved at motorway speeds for 20+ minutes. Urban-only driving accumulates soot faster than passive regen can clear it. Blocked EGR valves worsen the situation.

How To Fix

Attempt an active forced regen using a suitable OBD diagnostic tool (Forscan free option)
If soot load >85%, a forced regen will fail — remove and clean the DPF professionally (£150-300)
Check and clean EGR valve at the same time
As a last resort, replace the DPF — OEM £600-1,200, pattern £300-500
Prevention: take the car on a 20-min motorway run every 2 weeks minimum

Estimated Repair Costs

Repair Option	Est. Cost (GBP)
DIY (parts only)	£60–£480
Independent Garage	£150–£1200
Main Dealership	£240–£1920

Other Faults on This Variant

EGR Valve Failure and Intake Carbonisation

Moderate

2013-201740,000–90,000 miles£80–£350

EGR failure on the 1.5 TDCi Fiesta is a common companion to DPF issues. Carbon deposits block the valve and intake manifold, causing power loss and rough running.

Diesel Injector Failure and Rough Running

Severe

2013-201780,000–160,000 miles£200–£800

Common rail injectors on the 1.5 TDCi can fail, causing misfires, excessive smoke and hard starting. Injector failure can also result in diesel washing the cylinder walls, accelerating engine wear.

Turbocharger Oil Starvation and Failure

Severe

2013-201790,000–170,000 miles£400–£900

Turbo failure on the 1.5 TDCi is typically caused by oil feed pipe blockage or low oil levels. The small-displacement turbo spins at extreme speeds and is vulnerable to oil starvation.

Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.