Guides
Turbo : symptômes de turbo HS, causes et coût de réparation
Un turbo qui siffle et une chute soudaine en mode dégradé trahissent souvent un de six défauts. Voici ce que fait un turbo HS et ce que coûte la réparation.
26 juin 202610 min
Topic Cluster/Groupe thematique : diagnostic OBD2
Diagnostic OBD2 et codes defaut
Guide complet des codes de diagnostic OBD2. Decouvre ce que signifient P0300, P0171, P0420 et les autres codes defaut, comment les diagnostiquer, les couts de reparation et quand il est sans risque de conduire.
Tous les articles de ce groupe
Guides
DPF Regeneration: What It Is, the Signs, and Can You Drive?
DPF regeneration is your diesel burning soot out of its filter at over 600C. Here are the three types, the signs it is happening, and whether you can keep driving.
25 juin 20268 min
Guides
Where Is the OBD2 Port? How to Find It Fast in Any Car
The OBD2 port sits under the dash within about 45 cm of the steering wheel in nearly every car built since 2001. Here is where to look, by spot and by make.
24 juin 20268 min
Guides
Problèmes d'arbre à cames : symptômes, causes, codes et coût
Ralenti instable, cliquetis à froid ou un code P0010 ? La plupart des problèmes d'arbre à cames sont une électrovanne ou un capteur pas cher, pas l'arbre usé.
24 juin 202611 min
Guides
Bad Ignition Coil Symptoms (and How to Confirm It With OBD2)
A failing ignition coil shows up as a misfire, rough idle, and a flashing engine light. Here are the symptoms, the codes that name the cylinder, and the cost.
21 juin 20268 min
Guides
FIXD Alternative 2026: No Sensor Lock-In, No Subscription
Looking for a FIXD alternative because of the proprietary sensor or the Premium subscription push? Here are the honest options and who each one suits.
20 juin 20269 min
Guides
Bobine d'allumage : rôle, signes de panne, codes et coût
Une bobine d'allumage alimente la bougie, et quand elle faiblit le moteur rate. Son rôle, pourquoi elle lâche, les codes qui nomment le cylindre et le coût.
19 juin 202610 min
Guides
Bad Torque Converter Symptoms: Signs, Codes and Repair Cost
Shudder at 30-50 mph, RPM flare without acceleration, and harsh Park-to-Drive shifts point to a failing torque converter. Here are the signs, codes and costs.
18 juin 202610 min
Guides
Vanne EGR : rôle, symptômes, codes et coût
Une vanne EGR défectueuse donne un ralenti instable, des à-coups et un code P0401. Voici son rôle, les symptômes bloquée ouverte ou fermée, et le coût.
17 juin 202610 min
Guides
I Cleared the Fault Code and It Came Back: What It Means
Clearing a fault code does not fix the fault. If the code comes back, it is an active problem, not a reset failure. Read it yourself for 15 euros to know which.
16 juin 20268 min
Guides
BlueDriver Alternative 2026: Cheaper, Free, and No Lock-In
Looking for a BlueDriver alternative because the bundle costs around 100 euros or you already own an ELM327? Here are the honest options and who each suits.
15 juin 20268 min
Guides
How to Negotiate a Used Car Price With OBD2 Scan Evidence
Two stored fault codes can be worth several hundred euros off the asking price if you present them right. Here is how to turn a pre-purchase OBD2 scan into a documented discount.
12 juin 202610 min
Guides
Catalyseur : symptômes, causes et le prix d'un catalyseur HS
Un catalyseur défaillant déclenche le P0420, sent l'oeuf pourri et recale au contrôle technique. Voici comment lire les symptômes, les codes et le vrai coût.
12 juin 202610 min
Guides
How to Check a Used Car Before Buying: The Full Checklist
Most used-car checklists cover paint and a test drive but skip the one check sellers fear: a 5-minute OBD2 scan that reads the faults the eye cannot see.
11 juin 20269 min
Guides
Car Hard to Start But Runs Fine? Causes, Fixes and Cost
Your car cranks several times before it fires, then drives perfectly. Here is what makes a car hard to start, how to find the fault, and what each fix costs.
11 juin 202611 min
Guides
Will Your Car Pass the Emissions Test? Check Readiness Monitors First
A car can fail its emissions test for incomplete readiness monitors even with nothing wrong. Check them yourself for 15 euros before you book the test.
11 juin 20268 min
Guides
Which OBD2 Codes Fail Inspection (And Why Clearing Them Fails Too)
Clearing a code before inspection resets the readiness monitors, and stations check those. Here are the OBD2 codes that fail, and why a fresh clear fails anyway.
10 juin 20269 min
Guides
Recently Cleared Codes: How Readiness Monitors Expose It
A used car that scans clean can still have its codes wiped minutes before you arrived. Readiness monitors are how you catch it. Here is the check.
9 juin 20269 min
Guides
How to Find Out What Is Wrong With Your Car for 15 Euros
A 15 euro Bluetooth adapter and a free phone app read the exact fault code a shop charges 30 to 100 euros to pull. Here is how to do it yourself in 5 minutes.
8 juin 20269 min
Guides
OBD2 Red Flags When Buying a High-Mileage Imported Diesel
A 210,000 km imported diesel that looks too clean hides its faults in the OBD2 data. Here are the red flags a scan catches before you wire the money.
7 juin 202610 min
Guides
Why Does My Car Shut Off When I Stop? Causes, Fixes and Cost
Your car dies at every red light, then restarts fine. Here is what causes a car to shut off when you stop, how to find the fault, and what fixes cost.
7 juin 202610 min
Guides
VIN Decode Plus OBD2: The Two-Step Pre-Purchase Check
Decode the VIN to confirm the car is the spec the ad claims, then run an OBD2 scan to read its condition. Two steps, fifteen minutes, before you pay.
6 juin 20269 min
Guides
Torque Pro Alternative 2026: iPhone, Free, and Explained Picks
Looking for a Torque Pro alternative because you have an iPhone or want the data explained? Here are the honest options, what each does, and who they suit.
6 juin 20268 min
Guides
Boost Pressure Sensor Symptoms: Diagnose Limp Mode (2026)
A failing boost or MAP sensor drops a turbodiesel into limp mode on motorway on-ramps. Here are the symptoms, the test, and how to confirm it with OBD2.
5 juin 202612 min
Guides
Camshaft and Crankshaft Position Sensors: Symptoms and Test
Intermittent no-start or random stall? Learn the symptoms of bad camshaft and crankshaft position sensors, how to tell them apart, and how to verify with OBD2.
4 juin 202612 min
Guides
Coolant Temperature Sensor Symptoms: How to Spot a Bad ECT
A bad coolant temperature sensor causes poor fuel economy, hard starts, black smoke, and false overheating. Here are the symptoms and how to confirm it.
2 juin 202611 min
Guides
Why Is My Car Shaking? The 9 Causes and What Each One Costs
Your car shakes at idle, under braking, or at 90 km/h. Here are the nine real causes, which ones an OBD2 scan reads, and what each repair costs.
1 juin 202610 min
Guides
Diesel Injector Failure Symptoms: Diagnose Before You Buy
A failing diesel injector knocks on cold start, smokes, and idles rough. Here are the symptoms, the cylinder-balance test, and how to confirm it with OBD2.
1 juin 202612 min
Guides
EGR Valve Cleaning: DIY Steps, Cost, and OBD2 Check
Clean a carboned diesel EGR valve yourself for €10-30. Symptoms, step-by-step removal, when to clean vs replace, and how to verify the fix with OBD2.
30 mai 202613 min
Guides
Glow Plug Testing and Replacement: A Diesel Cold-Start Guide (2026)
Long cranking on cold mornings and a flickering coil light point to glow plugs. Test each one with a multimeter, read the circuit codes, and know when to replace.
29 mai 202612 min
Guides
Oxygen Sensor Testing and Replacement: A DIY Guide
Test a lambda sensor with OBD2 live voltage or a multimeter, learn why cleaning is a myth, and see what replacement actually costs. Petrol and diesel covered.
26 mai 202613 min
Guides
Alternative à OBDeleven sans abonnement : 5 applis comparées (2026)
Alternatives à OBDeleven sans abonnement en 2026. BimmerCode, Carista, Torque Pro, Car Scanner ELM, Skanyx comparées. Achat unique contre crédits.
24 mai 202611 min
Guides
Throttle Body Cleaning: Steps, Relearn, OBD2 Verify
Clean a sooty throttle body in under an hour for around 15 euros, handle the idle-relearn question honestly, and verify the fix with OBD2 live data.
24 mai 202612 min
Guides
Carly vs OBDeleven 2026: Cost, Coding Depth and Which to Choose
Carly vs OBDeleven head-to-head 2026: pricing, BMW/Mercedes vs VAG coding depth, adapter lock-in, ongoing costs. Side-by-side comparison and verdict.
21 mai 202611 min
Guides
Carly Alternative Without Subscription: 5 Apps for BMW & Mercedes (2026)
Carly alternatives without subscription in 2026 for BMW and Mercedes owners. BimmerCode, BimmerLink, OBDeleven, Skanyx, Torque Pro compared. One-time payment options.
18 mai 202610 min
Guides
Car Scanner ELM vs Torque Pro 2026: Free, Android, iPhone Compared
Car Scanner ELM OBD2 vs Torque Pro 2026: free tier, platforms, customization, raw data. Side-by-side comparison with verdict and adapter pairing guide.
14 mai 20269 min
Guides
Used BMW i3 Buyer's Guide: Battery Health and Range Check
Three battery generations, REX quirks, and four OBD2 checks that separate a healthy used BMW i3 from a tired one. Before you pay 8,000 to 28,000 euros.
6 mai 202610 min
Guides
AdBlue Tampering: A 5-Minute OBD2 Check Before You Buy an EU Diesel
An AdBlue emulator or SCR delete is invisible on the dashboard but leaves stored DEF codes a generic OBD2 scan catches in five minutes. A specialist NOx read confirms the rest.
28 avril 20269 min
Guides
EGR Delete Detection: What OBD2 Will (And Won't) Show on a Used Diesel
EGR deletion is the hardest of the three diesel emissions cheats to detect with OBD2. Here is what the scan tool reveals, what it cannot, and three physical checks that close the gap.
23 avril 20269 min
Guides
How to Spot a Deleted DPF on a Used Diesel Before You Buy
A removed diesel particulate filter is illegal across the EU and costs EUR 1,500 to 3,500 to refit. Six checks (three visual, three OBD2) catch it before you pay.
18 avril 20269 min
Guides
How to Check a German Used Car With OBD2 Before You Buy It
A 15-minute pre-purchase OBD2 scan tells you most of what the seller of an imported German used car would rather you didn't ask. Here is the exact checklist.
12 avril 20269 min
Guides
How to Fix P0430: Catalyst Bank 2 Repair Cost
Fixing P0430 costs 110-270 euros if it is the Bank 2 oxygen sensor, or 300-1,900 euros for the converter. Here is how to tell which one before you pay.
17 mars 20268 min
Guides
How to Fix P0507: High Idle RPM Causes and Repair Cost
Fixing P0507 ranges from free for a loose vacuum hose to around 400 euros for a throttle body. Here is how to find the cause of a high idle before buying parts.
14 mars 20264 min
Guides
How to Fix P0401: EGR Cleaning vs Replacement Cost
Fixing P0401 starts with cleaning the EGR valve, under 20 euros if you do it yourself. Replacement runs 160-550 euros. Here is how to know which one you need.
12 mars 20268 min
Guides
How to Fix P0446: EVAP Vent Solenoid Repair Cost
Fixing P0446 costs 60-180 euros total to replace the EVAP vent solenoid. Check the connector for corrosion first, as wiring is the second most common cause.
10 mars 20265 min
Guides
How to Fix P0174 (Too Lean, Bank 2): Causes and Repair Cost
P0174 repair often costs under €200, starting with a €15 MAF clean, up to €500 for fuel pressure. How to diagnose the Bank 2 lean condition and fix it.
8 mars 20268 min
Guides
How to Fix P0340: Camshaft Sensor Replacement Cost
Fixing P0340 usually costs 50-200 euros to replace the camshaft position sensor. Check the connector for corrosion first, then confirm the sensor failed.
7 mars 20264 min
Guides
How to Fix P0172 (System Too Rich): Repair Cost and Steps
P0172 repair often costs under €15 if a dirty MAF sensor is the cause, with most fixes under €300. How to diagnose the rich condition and fix it yourself.
5 mars 20267 min
Guides
How to Fix Misfire Codes P0300 to P0304: Repair Cost by Cause
Fixing a P0300 to P0304 misfire costs 40-250 euros for most cases. Here is how to tell which part failed - plug, coil, or injector - before paying for parts.
3 mars 20267 min
Guides
How to Fix P0141: O2 Heater Repair Cost (Bank 1, Sensor 2)
P0141 repair starts with a pennies fuse check, then downstream O2 sensor replacement at €110 to €270 if needed. How to test the heater and fix it yourself.
1 mars 20267 min
Guides
How to Fix P0135: O2 Sensor Heater Repair Cost (Bank 1)
P0135 repair starts with a pennies fuse check, then upstream O2 sensor replacement at €120 to €300 if needed. How to test the heater and fix it yourself.
26 février 20263 min
Guides
How to Fix P0128: Thermostat Replacement Cost and Steps
P0128 repair means a thermostat replacement costing €95 to €260 in most cases. How to confirm the stuck-open thermostat and fix it before winter sets in.
24 février 20268 min
Guides
How to Fix P0101: MAF Sensor Cleaning and Repair Cost
P0101 repair often costs under €15: cleaning the MAF sensor fixes about half of cases. If that fails, replacement runs €70 to €380. Step-by-step fix guide.
19 février 20269 min
Guides
How to Fix P0016: Camshaft Correlation Causes and Cost
P0016 repair cost runs from €50 for an oil change to €3,000 for a timing chain, depending on whether the fault is oil, a VVT solenoid, or chain stretch.
15 février 20268 min
Guides
BMW Fault Codes by Engine: N52, N54, N55 and What to Expect
BMW fault codes explained by engine family. VANOS, HPFP, turbo, oil leak, and DME codes for N52, N54, N55 with EU repair costs and diagnostic tool options.
25 octobre 202514 min
Guides
EVAP Leak: Common Causes & How to Find It (P0442/P0456 Guide)
EVAP leak causing a check engine light? P0442, P0455, P0456 explained. Start with the gas cap. Causes, diagnosis, and repair costs in euros.
5 mai 202512 min
Guides
Lire les données en direct OBD2 : paramètres, plages normales et ce que chaque valeur signifie (2026)
Comment lire les données en direct OBD2 : ajustements de carburant, tensions sonde lambda, MAF, température moteur, position papillon, avance à l'allumage. Plages normales par PID et ce que veulent dire les valeurs anormales, en langage clair.
15 avril 202521 min
Guides
Réparer le P0171 (mélange trop pauvre) : causes et coût
Réparer un P0171 coûte de 50 à 800 € : une prise d'air ou un débitmètre encrassé sont les causes les moins chères et les plus fréquentes. Diagnostic par les corrections de richesse.
20 février 202516 min
Guides
What is OBD2? Complete Beginner's Guide to Car Diagnostics
Learn how OBD2 works, find the port in your car, understand diagnostic trouble codes, know which problems you can fix yourself, and when to see a mechanic.
10 février 202514 min
Guides
How Much Does P0420 Cost to Fix? Catalytic Converter Guide
P0420 repair cost runs from 150 euros for an oxygen sensor to 2,500 euros or more for a catalytic converter. Here is how to work out which repair you need.
20 janvier 202514 min
How-To Guides
Check Engine Light: What It Means, Common Causes, and Repair Costs
Your check engine light is on. Learn what solid vs flashing means, the most common codes, how to diagnose them, and what repairs typically cost.
15 septembre 202415 min
Guides
Meilleurs outils de diagnostic auto 2026 : prix, couverture multimarque et choix pour garages
Comparatif des meilleurs outils de diagnostic auto 2026 : scanners, applis, codage multimarque et tablettes pro. Prix réels en euros, de 30 € à 1 500 €.
30 août 202425 min
Guides
OBDeleven Review 2026: Price, Carly Comparison, and Is It Worth It?
Honest OBDeleven review for 2026: real prices (device + PRO/ULTIMATE subscription), comparison with Carly, VCDS, BimmerCode, and Skanyx, plus what it does and doesn't do on VW Group, BMW, Toyota, and Mercedes.
25 août 202414 min
Guides
Meilleure appli OBD2 2026 : gratuite, Android, iPhone comparées
Meilleure appli OBD2 2026 : gratuite, Android, iPhone testées. Car Scanner ELM, Torque Pro, OBDeleven, Carly, BlueDriver, Skanyx comparées. Choisis la bonne pour ta voiture.
20 août 202417 min