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2000 Audi A6 Quattro
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2000 Audi A6 Quattro Oxygen Sensors

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After Catalytic Converter Oxygen Sensor, Sold individually 4-wire
DriveWire
After Catalytic Converter Oxygen Sensor, Sold individually 4-wire
Part Number: ARBV960910
Guaranteed to Fit
$21.76
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 66.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024414Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, 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.

Returns Policy : 30-Day Return Policy
After Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
DriveWire
After Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
Part Number: SET-ARBV960910-2
Guaranteed to Fit
$41.49
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : After Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 66.75 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, 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.

Returns Policy : 30-Day Return Policy
Before and After Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
DriveWire
Before and After Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
Part Number: SET-ARBV960907-4
Guaranteed to Fit
$95.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Before and After Catalytic Converter, Driver and Passenger SideComponents : (4) Oxygen SensorsType : 4-wireQuantity Sold : Set of 4Product Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, 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.

Returns Policy : 30-Day Return Policy
Before Catalytic Converter Oxygen Sensor, Sold individually 4-wire
DriveWire
Before Catalytic Converter Oxygen Sensor, Sold individually 4-wire
Part Number: ARBV960907
Guaranteed to Fit
$38.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 24.5 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024395Connector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, 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.

Returns Policy : 30-Day Return Policy
Before Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
DriveWire
Before Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
Part Number: SET-ARBV960907-2
Guaranteed to Fit
$50.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Before Catalytic Converter, Driver and Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 24.5 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Male ConnectorWarranty : 1-year DriveWire unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, 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.

Returns Policy : 30-Day Return Policy
6-Piece Kit Driver and Passenger Side Catalytic Converter, Federal EPA Standard, 46-State (Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME), includes Oxygen Sensors
Evan Fischer®
6-Piece Kit Driver and Passenger Side Catalytic Converter, Federal EPA Standard, 46-State (Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME), includes Oxygen Sensors
Part Number: KIT-082316-16
Guaranteed to Fit
$580.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Automatic Transaxle, Undercar
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Automatic Transaxle, Undercar
Product Details
Location : Driver And Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Components : (1) Driver Side Catalytic Converter, (1) Passenger Side Catalytic Converter, (2) After Catalytic Converter, Driver Side Oxygen Sensors, (2) Before Catalytic Converter, Driver Side Oxygen SensorsRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitEPA : N/TB6000/501-430, N/TB6000/63005NNGasket 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 : 40463, 40464, 25024414, 25024395Series : Direct Replacement SeriesTube Material : Aluminized Steel
Passenger Side Direct Replacement 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)
Evan Fischer®
Passenger Side Direct Replacement 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: KIT-082316-13
Guaranteed to Fit
$273.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Automatic Transaxle, Undercar
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Automatic Transaxle, Undercar
Product Details
Location : Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 48.5 in. overall lengthComponents : (1) Passenger Side Catalytic Converter, (2) After Catalytic Converter, Driver Side Oxygen SensorsRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitEPA : N/TB6000/501-430, N/TB6000/63005NNGasket Included : Without 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 : 40464, 25024414Series : Direct Replacement SeriesTube Material : Aluminized Steel
Driver Side Direct Replacement 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)
Evan Fischer®
Driver Side Direct Replacement 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: KIT-082316-14
Guaranteed to Fit
$297.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Automatic Transaxle, Undercar
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Automatic Transaxle, Undercar
Product Details
Location : Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 50 in. overall lengthComponents : (1) Driver Side Catalytic Converter, (2) Before Catalytic Converter, Driver Side Oxygen SensorsRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitEPA : N/TB6000/501-430, N/TB6000/63005NNGasket 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 : 40463, 25024395Series : Direct Replacement SeriesTube Material : Aluminized Steel
Driver Side Direct Replacement 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)
Evan Fischer®
Driver Side Direct Replacement 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: KIT-082316-15
Guaranteed to Fit
$273.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Automatic Transaxle, Undercar
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Automatic Transaxle, Undercar
Product Details
Location : Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 50 in. overall lengthComponents : (1) Driver Side Catalytic Converter, (2) After Catalytic Converter, Driver Side Oxygen SensorsRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitEPA : N/TB6000/501-430, N/TB6000/63005NNGasket 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 : 40463, 25024414Series : Direct Replacement SeriesTube Material : Aluminized Steel
Passenger Side Direct Replacement 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)
Evan Fischer®
Passenger Side Direct Replacement 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: KIT-082316-12
Guaranteed to Fit
$297.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Automatic Transaxle, Undercar
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Automatic Transaxle, Undercar
Product Details
Location : Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 48.5 in. overall lengthComponents : (1) Passenger Side Catalytic Converter, (2) Before Catalytic Converter, Driver Side Oxygen SensorsRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : KitEPA : N/TB6000/501-430, N/TB6000/63005NNGasket Included : Without 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 : 40464, 25024395Series : Direct Replacement SeriesTube Material : Aluminized Steel
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Bosch®
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS16073
Guaranteed to Fit
$108.49
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Downstream or UpstreamType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 66.9 in. Wire LengthInterchange Part Number : 25641, 16159Includes : Includes mounting hardwareWarranty : 1-year Bosch 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.

Promotions : European Vehicle PartsSeries : OE Replacement Series
OE Replacement Series Oxygen Sensor, Set of 2 4-wire
Bosch®
OE Replacement Series Oxygen Sensor, Set of 2 4-wire
Part Number: SET-BS16073-2
Guaranteed to Fit
$205.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Downstream and UpstreamNotes : Set Components - (2) Oxygen SensorType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 66.9 in. Wire LengthIncludes : Includes mounting hardwareWarranty : 1-year Bosch 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.

Promotions : European Vehicle PartsSeries : OE Replacement Series
After Catalytic Converter Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Walker Products®
After Catalytic Converter Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024414
Guaranteed to Fit
$83.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 66.54 in. Wire LengthInterchange Part Number : ARBV960910Warranty : 90-day Walker Products 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 : Walker Products Original Equipment Base Sensor
Before Catalytic Converter OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Bosch®
Before Catalytic Converter OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS16287
Guaranteed to Fit
$78.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 16073, 2344812Warranty : 1-year Bosch 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.

Promotions : European Vehicle PartsSeries : OE Replacement Series
After Catalytic Converter Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Walker Products®
After Catalytic Converter Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034138
Guaranteed to Fit
$74.99
Vehicle Fitment
  • 2000 Audi A6 Quattro Base 6 Cyl 2.8L Eng. Designation: ATQ, Eng. VIN: H, FI, Naturally Aspirated, GAS
  • 2000 Audi A6 Quattro Base 6 Cyl 2.7L Eng. Designation: APB, Eng. VIN: D, FI, Turbocharged, GAS
  • 2000 Audi A6 Quattro Avant 6 Cyl 2.8L Eng. Designation: ATQ, Eng. VIN: H, FI, Naturally Aspirated, GAS
  • 2000 Audi A6 Quattro Base 8 Cyl 4.2L Eng. Designation: ART, Eng. VIN: L, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 66.54 in. Wire LengthWarranty : 90-day Walker Products 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 : Walker Products Aftermarket Base Sensor
Page 1 of 3 | Showing 1 - 15 of 44 results

Top Rated Products

DriveWire Before Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 2.7L/2.8L/4.2L Engine
$50.99( Review)
Works perfect! Perfect fit and function! Great parts at a very reasonable rate!
Chris D.
VERIFIED PURCHASER
DriveWire Before Catalytic Converter Oxygen Sensor, Sold individually 4-wire
$38.99( Review)
good price .fixed the check engine light issue
Stephen R.
VERIFIED PURCHASER

Popular Products

Helpful Automotive Resources

P2187 Code: System too Lean at Idle (Bank 1)
P2187 Code: System too Lean at Idle (Bank 1)Note that there is only one bank if your car has a straight engine and the scan tool will always refer to that bank as “Bank 1.” P2187 code indicates that your vehicle’s computer detected a potential issue with the fuel mixture at idle.
P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)
P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)Bank 1 is where the #1 spark plug is. O2 sensor 1/1 is the upstream sensor on Bank 1 (different for a Ford than for a Chevy or a Dodge), and O2 sensor 1/2 is the downstream sensor on Bank 1. O2 2/1 is upstream on Bank 2 and O2
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)With that in mind, it’s important to note that Bank 1 is always where the number 1 cylinder is located. Thus, on Ford pickups, Bank 1 is the passenger side bank, but on Chevy and Dodge pickups, Bank 1 is the driver side bank. You need to know this, or
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.
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)Diagnostic trouble code (DTC) P0135 stands for “Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1).” It is set when the car’s primary computer—also called the powertrain control module or PCM—determines that the heated oxygen sensor (HO2S) 1 heater current is higher or lower than the ideal amp for
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.