How much does p0420 catalyst fault diagnosis cost in Hyderabad? GarageNation publishes transparent pricing for all catalytic converter services. P0420 Catalyst Fault Diagnosis repair range: ₹2,000 – ₹6,000. Turnaround: 2–4 hours. Warranty: Diagnosis report included.
Diagnosis: ₹1,500–₹2,500 (deducted from repair cost if you proceed)
Repair/cleaning: This is the lower end of the ₹2,000 – ₹6,000 range — applicable when the component can be serviced without full replacement.
Component replacement: This is the upper end of the range — applicable when the component has failed beyond service or cleaning.
Warranty: Diagnosis report included.
Many workshops in Hyderabad quote p0420 catalyst fault diagnosis replacement over the phone without seeing the car. GarageNation never does this — we scan the car with our OEM diagnostic tool first. 30–40% of customers who come in expecting expensive replacement find a cleaning or adaptation reset resolves the fault at a fraction of the cost.
Why does the P0420 code keep coming back after being cleared?
P0420 is a monitored code — the ECU runs the catalyst efficiency test on every cold-start cycle and sets the code when catalyst efficiency falls below the threshold. Clearing the code only resets the test; it doesn't fix the underlying cause. GarageNation's P0420 diagnosis determines whether it's a ₹3,500 O2 sensor or a ₹25,000+ catalyst replacement.
Can I pass PUC with P0420?
PUC testing in India measures tailpipe emissions (CO, HC) rather than reading OBD codes. A mildly degraded catalyst may still pass PUC but set P0420. However, if the catalyst is significantly degraded, both the P0420 code and PUC failure occur together. GarageNation resolves P0420 to ensure long-term emission compliance.
Is p0420 catalyst fault diagnosis covered by car insurance in India?
Standard comprehensive motor insurance covers p0420 catalyst fault diagnosis only if the damage was caused by an accident or a specified peril (fire, flood). Mechanical failure from wear is not covered. Some premium insurance add-ons (engine protect, gearbox protect) do cover catalytic converter failures — check your policy document. GarageNation provides detailed repair reports for insurance claims.
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