Quick answer
Car Failed Emission Test / PUC Hyderabad: the most common causes are dirty fuel injectors causing rich mixture and high hc/co emissions, faulty oxygen sensor causing ecu to run incorrect fuel trim, catalytic converter degraded — no longer converting exhaust pollutants. Metre Per Second (KPHB, Hyderabad) diagnoses the exact fault and repairs it same-day — typical work runs ₹1,000 – ₹2,000, with free pickup and drop across Hyderabad, OEM-grade parts and a 1-year warranty. Call +91 8555824915.
What causes Car Failed Emission Test / PUC Hyderabad?
These are the faults we most often find behind this symptom on cars driven in Hyderabad's heat and stop-go traffic:
- Dirty fuel injectors causing rich mixture and high HC/CO emissions
- Faulty oxygen sensor causing ECU to run incorrect fuel trim
- Catalytic converter degraded — no longer converting exhaust pollutants
- EGR system blocked — NOx not being recirculated for reduction
- Engine running rich from other faults — fuel consumption high, emissions high
Repairs & indicative pricing (INR)
| Repair | Indicative price |
|---|---|
| Emission diagnostic + OBD readiness test | ₹1,000 – ₹2,000 |
| Fuel injector cleaning | ₹3,000 – ₹6,000 |
| O2 sensor replacement | ₹3,000 – ₹9,000 |
| Catalytic converter inspection/replacement | ₹1,000 – ₹30,000 |
| EGR service | ₹2,500 – ₹8,000 |
Final price depends on diagnosis. We share a written estimate before any work — no surprises. Free pickup & drop across Hyderabad, OEM-grade parts and a 1-year warranty.
Frequently asked questions
My car keeps failing PUC in Hyderabad — what's the fix?
Repeated PUC failure means a persistent emission system fault. Most common causes: O2 sensor failure (ECU runs wrong fuel mixture), dirty injectors (unburnt fuel in exhaust), degraded catalytic converter (no longer converting HC/CO/NOx). Metre Per Second performs an emissions diagnostic scan that shows exactly which pollutant is elevated (HC, CO, or NOx) — this narrows down the faulty component before any parts are ordered.
Related car problems we fix in Hyderabad
Why Hyderabad drivers choose Metre Per Second
- Factory-grade diagnostics — we read the real fault, not just a generic code.
- Free pickup & drop across all of Hyderabad — KPHB, Kukatpally, Miyapur, Hitech City, Gachibowli, Banjara Hills, Secunderabad and more.
- 1-year unconditional warranty on parts and labour.
- Transparent, written estimates — typically 30–50% below authorised dealers.