Quick answer
CNG Car Not Starting: the most common causes are cng solenoid valve failure, cng ecu fault or corrupted map after battery disconnect, clogged cng filter reducing gas flow to injectors. Metre Per Second (KPHB, Hyderabad) diagnoses the exact fault and repairs it same-day — typical work runs ₹500 – ₹1,500, with free pickup and drop across Hyderabad, OEM-grade parts and a 1-year warranty. Call +91 8555824915.
What causes CNG Car Not Starting?
These are the faults we most often find behind this symptom on cars driven in Hyderabad's heat and stop-go traffic:
- CNG solenoid valve failure – gas not flowing from cylinder to engine
- CNG ECU fault or corrupted map after battery disconnect
- Clogged CNG filter reducing gas flow to injectors
- CNG reducer/regulator failure causing insufficient gas pressure
- Gas cylinder shutoff valve accidentally closed or empty cylinder
Repairs & indicative pricing (INR)
| Repair | Indicative price |
|---|---|
| CNG system diagnosis | ₹500 – ₹1,500 |
| CNG solenoid valve replacement | ₹2,000 – ₹5,000 |
| CNG filter replacement | ₹500 – ₹1,500 |
| CNG reducer/regulator service | ₹2,000 – ₹6,000 |
| CNG ECU reprogramming | ₹2,000 – ₹4,000 |
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 CNG car starts on petrol but not on CNG — what's the problem?
If your car runs on petrol but not CNG, the issue is specific to the CNG system: most commonly a failed CNG solenoid valve (which controls gas flow), a clogged CNG filter, or a faulty CNG reducer. These can be diagnosed with a pressure test. Metre Per Second services all major CNG brands including Lovato, Tomasetto, BRC, and Sequent. Diagnosis takes 30–60 minutes.
CNG car won't switch from petrol to CNG mode — why?
This is usually caused by: 1) Low CNG rail pressure (reducer issue), 2) CNG ECU fault, 3) Faulty selector switch or wiring. The CNG ECU monitors multiple parameters before allowing gas mode — if any sensor is out of range, it stays on petrol. Metre Per Second uses dedicated CNG diagnostic tools to read ECU fault codes and pinpoint the issue.
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.