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VOLVO
ECM-2187
ECM-2171
ECM-2195

ECM-2187, ECM-2171, ECM-2195 Volvo 2.5T / T5 / T6 – Vevhusventilation (PCV) Technical Diagnostic Guide

Diagnostic Priority: High
Complexity Level: Advanced

Technical diagnostic guide for Volvo 2.5T / T5 / T6 covering fault codes ECM-2187, ECM-2171, ECM-2195. Factory live data tolerances and repair procedures.

Vehicle

VOLVO

Codes

3 units

Analysis Type

Technical Expert

Status

Analyzed

Technical Analysis

REF: #2D9C0B

The fault combination ECM-2187, ECM-2171, ECM-2195 on Volvo 2.5T / T5 / T6 points to a validated mechanical or sensor failure requiring systematic diagnostic verification.

Expected Symptoms

Check Engine lamp active and turbo boost pressure drops under hill climbing (DTCs: ECM-2187, ECM-2171, ECM-2195)
Hissing or rushing air noise audible from engine bay under acceleration
Hesitation and surging at steady motorway cruising speeds (90–110 km/h)

System Impact

Drivetrain
Engine Control
Emission Control

Potential Fault Sources

01Split intercooler boost hose or ruptured charge air cooler core with oil weeping (affecting circuit for ECM-2187, ECM-2171, ECM-2195)
02Sticking variable turbine geometry (VNT) vanes or failing electronic boost actuator
03Soot-choked exhaust gas recirculation (EGR) valve sticking in partially open state (logged fault: ECM-2187)

Workflow / Methodology

01

Verify supply voltage and reference ground for ECM-2187, ECM-2171, ECM-2195 with multimeter at key ON.

02

Pressure-test induction tract with smoke tester or compressed air at 1.5 bar to pinpoint leaks.

03

Verify VNT electronic actuator stroke and angular position feedback throughout full travel.

04

Clean or replace EGR valve and reset adaptation values in engine control module.

Live Data & Mätvärdestoleranser (Är/Bör-värden)

Fabriksgodkända referensvärden vid diagnos och live-avläsning

Mätvärdesblock
Parameter / SignalTestvillkorBör-värde (Normalt)Avvikelse / Varning
VevhusundertryckTomgång-15 till -25 mbar> 0 mbar
Laddtryck Bör vs ÄrFullgas 2 500 rpm2 200 – 2 550 hPa absAvvikelse > 300 hPa
Luftmassa MAF vid TomgångVarm tomgång EGR stängd450 – 550 mg/slag< 380 mg/slag (Läckage)

Assessment & Action Proposal

Technical Recommendation

Byte av oljefällemodul (oljefilterhus) med integrerat gummimembran. (1:1 Cloning available at OBD Tuning for damaged ECU/TCU/CEM modules).

Need a deeper analysis? Use our advanced fault code analyzer to find likely connections and in-depth guidance.

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Vanliga frågor om dessa felkoder

Vad är den primära orsaken till felkoderna?

The fault combination ECM-2187, ECM-2171, ECM-2195 on Volvo 2.5T / T5 / T6 points to a validated mechanical or sensor failure requiring systematic diagnostic verification.

Kan man köra vidare med tänd motorlampa / varningslampa?

Körning med aktiva felkoder kan leda till strypt motoreffekt (nödläge / Limp Home), blockerad partikelfilterregenerering eller följdskador på mekaniska komponenter. Felsökning bör genomföras omgående.

Hur åtgärdas kombinationen på säkrast sätt?

Byte av oljefällemodul (oljefilterhus) med integrerat gummimembran. (1:1 Cloning available at OBD Tuning for damaged ECU/TCU/CEM modules).