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1999 Honda Civic

1999 Honda Civic Catalytic Converters

If your car’s catalytic converter runs too hot, hampers the engine’s performance, or becomes clogged, it's important to replace it as soon as possible. When looking for a 1999 Honda Civic catalytic converter, CarParts.com is the place to shop. We carry only the best products from the most trusted brands in the aftermarket industry. Shop for a 1999 Honda Civic catalytic converter at CarParts.com today and enjoy big savings and fast shipping on your order.
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Front Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME), With Integrated Exhaust Manifold, 1.6L Engine
Part Number: JH960305
Guaranteed to Fit
$159.99
Vehicle Fitment
  • 1999 Honda Civic LX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic Value Package 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic DX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic EX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic CX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic GX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic Si 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic HX 4 Cyl 1.6L Manifold Converter
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Manifold Converter; 13.75 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/31075NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile JC Whitney limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 13096, 40248, 16096Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME), With Integrated Exhaust Manifold, 1.6L Engine
Part Number: REPH960305
Guaranteed to Fit
$179.86
Vehicle Fitment
  • 1999 Honda Civic GX 4 Cyl 1.6L
  • 1999 Honda Civic LX 4 Cyl 1.6L
  • 1999 Honda Civic DX 4 Cyl 1.6L
  • 1999 Honda Civic CX 4 Cyl 1.6L
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Manifold Converter; 13.75 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/31075NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40248Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV13096
Guaranteed to Fit
$181.99
Vehicle Fitment
  • 1999 Honda Civic LX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic Value Package 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic DX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic EX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic CX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic GX 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic Si 4 Cyl 1.6L Manifold Converter
  • 1999 Honda Civic HX 4 Cyl 1.6L Manifold Converter
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 14.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40248Series : Standard SeriesTube Material : Aluminized Steel
Center Exact Fit Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV48014
Guaranteed to Fit
$289.99
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Without air tube port provision; 17 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
Center Exact Fit Series Direct Fit Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Part Number: DAV174746
Guaranteed to Fit
$829.99
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L Emission Std: LEV1 LEV; Engine Family: Xhnxv01.6Ta3; Weight Class: Pc
Product Details
Location : CenterEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : 5 in. W x 5.25 in. H; 17 in. overall lengthType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-562-68Gasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
Center Exact Fit Series Direct Fit Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Part Number: DAV174774
Guaranteed to Fit
$866.99
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L Emission Std: TLEV; Engine Family: Xhnxv01.6Va2; Weight Class: Pc
Product Details
Location : CenterEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : 5 in. W x 5.25 in. H; 17 in. overall lengthType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-562-68Gasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Exact Fit SeriesTube Material : Aluminized Steel
Center Standard Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV18014
Guaranteed to Fit
$159.49
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L
Product Details
Location : CenterEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 17 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 22628Series : Standard SeriesTube Material : Aluminized Steel
Heavy Metal Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6699354HM
Guaranteed to Fit
$188.00
Vehicle Fitment
  • 1999 Honda Civic Si 4 Cyl 1.6L Cutting And Welding Required
  • 1999 Honda Civic EX 4 Cyl 1.6L Cutting And Welding Required
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 2 in. Inlet/Outlet; 15 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Heavy Metal SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME), Semi-Universal (Welding Required)
Part Number: M6651354
Guaranteed to Fit
$202.00
Vehicle Fitment
  • 1999 Honda Civic Si 4 Cyl 1.6L Cutting And Welding Required
  • 1999 Honda Civic EX 4 Cyl 1.6L Cutting And Welding Required
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 2 in. Inlet/Outlet; 15 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OEM Grade SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: M66418054
Guaranteed to Fit
$450.00
Vehicle Fitment
  • 1999 Honda Civic GX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic LX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic Value Package 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic DX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic EX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic Si 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic CX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
  • 1999 Honda Civic HX 4 Cyl 1.6L EO# D-193-119; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3; Cutting And Welding Required
Product Details
Emissions : CARB and Federal EPA Standards, 50-state LegalNotes : 2 in. Inlet/Outlet; 15 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-93-119Gasket Included : Without GasketWarranty : 5-year or 50,000-mile Magnaflow limited warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
HM Grade Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6622630
Guaranteed to Fit
$698.00
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L
  • 1999 Honda Civic Si 4 Cyl 1.6L
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Gaskets Included; 16.5 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 25,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 22628Series : HM Grade SeriesTube Material : Stainless Steel
HM Grade Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6650602
Guaranteed to Fit
$1,016.00
Vehicle Fitment
  • 1999 Honda Civic GX 4 Cyl 1.6L
  • 1999 Honda Civic LX 4 Cyl 1.6L
  • 1999 Honda Civic DX 4 Cyl 1.6L
  • 1999 Honda Civic CX 4 Cyl 1.6L
  • 1999 Honda Civic HX 4 Cyl 1.6L
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Exhaust Manifold with Integrated Catalytic Converter Federal (Exc.CA); 14.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 25,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40248Series : HM Grade SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: M66448304
Guaranteed to Fit
$718.00
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L EO# D-193-113; Eng Fam No: Xhnxv01.6Ta3; Eng Fam No: Xhnxv01.6Va2; Cutting And Welding Required
  • 1999 Honda Civic Si 4 Cyl 1.6L EO# D-193-113; Eng Fam No: Xhnxv01.6Ta3; Eng Fam No: Xhnxv01.6Va2; Cutting And Welding Required
Product Details
Emissions : CARB and Federal EPA Standards, 50-state LegalNotes : 16 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-113Gasket Included : Without GasketWarranty : 5-year or 50,000-mile Magnaflow limited warrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
California Series Direct Fit Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Part Number: M66452029
Guaranteed to Fit
$792.00
Vehicle Fitment
  • 1999 Honda Civic LX 4 Cyl 1.6L EO# D-193-116; Eng Fam No: Xhnxv01.6Ca3
  • 1999 Honda Civic DX 4 Cyl 1.6L EO# D-193-116; Eng Fam No: Xhnxv01.6Ca3
  • 1999 Honda Civic CX 4 Cyl 1.6L EO# D-193-116; Eng Fam No: Xhnxv01.6Ca3
  • 1999 Honda Civic HX 4 Cyl 1.6L EO# D-193-116; Eng Fam No: Xhnxv01.6Jl2
Product Details
Emissions : CARB and Federal EPA Standards, 50-state LegalNotes : 2 in. Main Piping Diameter; (1) Converter Quantity; Pre and Post Converter Oxygen Sensor Location; Ceramic Substrate Material; 14.25 in. overall lengthType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-108Gasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
California Series Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal
Part Number: M664481630
Guaranteed to Fit
$993.00
Vehicle Fitment
  • 1999 Honda Civic EX 4 Cyl 1.6L EO# D-193-139; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3
  • 1999 Honda Civic Si 4 Cyl 1.6L EO# D-193-139; Eng Fam No: Xhnxv01.6Va2; Eng Fam No: Xhnxv01.6Ta3
Product Details
Emissions : CARB and Federal EPA Standards, 50-state LegalNotes : Stainless Steel MaterialType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-139Gasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 5-year or 50,000-mile Magnaflow limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : California SeriesTube Material : Stainless Steel
Page 1 of 5 | Showing 1 - 15 of 63 results

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P0430 Code: Catalyst System Efficiency Below Threshold  (Bank 2)
P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2)In most cases, a vehicle with an inefficient catalytic converter will continue to run just fine. But if the converter is obstructed internally, it can cause poor engine performance and may even damage the engine in the long run.
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3Bank 1 is the side of the engine where the #1 cylinder is located. P0042 code is set when your car’s PCM determines a potential problem with the heater element circuit of the oxygen sensor.
Can You Drive Without a Catalytic Converter?
Can You Drive Without a Catalytic Converter?Technically, yes. Older cars ran just fine before catalytic converters became commonplace in the 1970s. So, if your question is whether your car will run without one, then it most certainly will. But the other question you should be asking is—should you risk it?  Removing or disabling the catalytic converter could
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)The PCM may disable the misfiring cylinder or cylinders in order to prevent further damage to the engine. Code P0316 is often listed in addition to one or more of the P0300 series codes that are associated with the misfiring cylinder/s.
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)The Bank 1 portion of the code refers to the side of the engine with the number one cylinder. Sensor 1 refers to the upstream O2 sensor.
How to Tell If the Catalytic Converter is Clogged
How to Tell If the Catalytic Converter is CloggedA clogged catalytic converter will present symptoms, while a chemically failed cat con that’s not clogged typically just illuminates the check engine light or malfunction indicator lamp (MIL). Also, if the cat con that just fails chemically but doesn’t clog is not the light-off cat con (the cat con closest