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1996 Buick Regal
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1996 Buick Regal

1996 Buick Regal Oxygen Sensors

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Before Catalytic Converter Oxygen Sensor, 4-wire, 6 Cyl., 3.1/3.8L Engines
DriveWire
Before Catalytic Converter Oxygen Sensor, 4-wire, 6 Cyl., 3.1/3.8L Engines
Part Number: ARBP960901
Guaranteed to Fit
$19.49
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.8L
  • 1996 Buick Regal Limited 6 Cyl 3.8L
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.1L
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024012Connector Gender : Female 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 and After Catalytic Converter, Center, Driver or Passenger Side Oxygen Sensors, 4-Wire, 6 Cylinder, 3.1L/3.8L Engine
DriveWire
Before Catalytic Converter and After Catalytic Converter, Center, Driver or Passenger Side Oxygen Sensors, 4-Wire, 6 Cylinder, 3.1L/3.8L Engine
Part Number: SET-ARBP960901
Guaranteed to Fit
$39.49
Vehicle Fitment
  • 1996 Buick Regal Custom 6 Cyl 3.1L Engine VIN: FI, M, Naturally Aspirated, GAS
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Limited 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic Converter and After Catalytic Converter, Center, Driver or Passenger SideComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Male and female 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 Sensors, 4-wire, 6 Cyl., (Before Catalytic Converter, Front and Rear, 3.1L, Engine VIN: FI, M, Naturally Aspirated, GAS)/3.8L Engines, Engine VIN: FI, L, Naturally Aspirated, GAS
DriveWire
Before Catalytic Converter Oxygen Sensors, 4-wire, 6 Cyl., (Before Catalytic Converter, Front and Rear, 3.1L, Engine VIN: FI, M, Naturally Aspirated, GAS)/3.8L Engines, Engine VIN: FI, L, Naturally Aspirated, GAS
Part Number: SET-ARBP960901-2
Guaranteed to Fit
$36.99
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Limited 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Engine VIN: FI, M, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 15 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female 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, 6 Cylinder, 3.1/3.8L Engine
DriveWire
Before and After Catalytic Converter, Driver and Passenger Side Oxygen Sensors, 4-Wire, 6 Cylinder, 3.1/3.8L Engine
Part Number: SET-ARBP960901-4
Guaranteed to Fit
$73.99
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Limited 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Engine VIN: FI, M, Naturally Aspirated, GAS
Product Details
Location : Before and After Catalytic Converter, Driver and Passenger SideComponents : (4) Oxygen SensorsType : 4-wireQuantity Sold : Set of 4Product Fit : Direct FitWire Length : 15 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female 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 Sensors, 4-Wire, 6 Cyl., 3.1L/3.8L Engine, Naturally Aspirated, GAS
DriveWire
Before Catalytic Converter Oxygen Sensors, 4-Wire, 6 Cyl., 3.1L/3.8L Engine, Naturally Aspirated, GAS
Part Number: SET-ARBP960901-3
Guaranteed to Fit
$55.49
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Limited 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Engine VIN: FI, K, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Engine VIN: FI, M, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterComponents : (3) Oxygen SensorsType : 4-wireQuantity Sold : Set of 3Product Fit : Direct FitWire Length : 15 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female 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
Oxygen Sensor, 4-Wire, Heated
DriveWire
Oxygen Sensor, 4-Wire, Heated
Part Number: ARBP960914
Guaranteed to Fit
$23.99
Vehicle Fitment
  • 1996 Buick Regal Limited 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.8L
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.1L
Product Details
Location : After Primary Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024340Connector Gender : Female 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
Oxygen Sensors, 3.1(After Catalytic Converter, Front)/3.8L (After Catalytic Converter) Engine, Set of 2
DriveWire
Oxygen Sensors, 3.1(After Catalytic Converter, Front)/3.8L (After Catalytic Converter) Engine, Set of 2
Part Number: SET-ARBP960914-2
Guaranteed to Fit
$38.99
Vehicle Fitment
  • 1996 Buick Regal Limited 6 Cyl 3.8L Engine VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Engine VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Engine VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Engine VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Engine VIN: M, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic Converter, FrontComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : Direct FitWire Length : 13 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeConnector Gender : Female 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
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Walker Products®
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034128
Guaranteed to Fit
$34.99
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Limited 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Eng. VIN: M, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 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
Oxygen Sensor, Sold individually 4-wire
Denso®
Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344012
Guaranteed to Fit
$28.49
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L O.E. Quality Replacement Sensor
  • 1996 Buick Regal Custom 6 Cyl 3.8L O.E. Quality Replacement Sensor
  • 1996 Buick Regal Limited 6 Cyl 3.8L O.E. Quality Replacement Sensor
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L O.E. Quality Replacement Sensor
  • 1996 Buick Regal Custom 6 Cyl 3.1L O.E. Quality Replacement Sensor
Product Details
Location : Before Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 13474Warranty : 1-year Denso 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.

Oxygen Sensor, Sold individually 4-wire
Denso®
Oxygen Sensor, Sold individually 4-wire
Part Number: NP2344000
Guaranteed to Fit
$46.99
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L O.E. Quality Universal Replacement Sensor
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L O.E. Quality Universal Replacement Sensor
  • 1996 Buick Regal Custom 6 Cyl 3.1L O.E. Quality Universal Replacement Sensor
  • 1996 Buick Regal Custom 6 Cyl 3.8L O.E. Quality Universal Replacement Sensor
  • 1996 Buick Regal Limited 6 Cyl 3.8L O.E. Quality Universal Replacement Sensor
Product Details
Location : Before or After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 13231Warranty : 1-year Denso 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.

GM Original Equipment Series Oxygen Sensor, Sold individually 4-wire
AC Delco®
GM Original Equipment Series Oxygen Sensor, Sold individually 4-wire
Part Number: ACAFS123
Guaranteed to Fit
$73.99
Vehicle Fitment
  • 1996 Buick Regal Limited 6 Cyl 3.8L Post Converter
  • 1996 Buick Regal Custom 6 Cyl 3.8L Post Converter
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Post Converter
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Post Converter
  • 1996 Buick Regal Custom 6 Cyl 3.1L Except Leaded Fuel Emis Export (NM8), Post Converter
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 9.55 in. Wire LengthThread Size : 18 mm Thread SizeInterchange Part Number : 15730, SG300Connector Gender : Male ConnectorWarranty : 24-months or unlimited mile AC Delco 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 : GM Original Equipment Series
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Walker Products®
Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: WKP35034076
Guaranteed to Fit
$33.99
Vehicle Fitment
  • 1996 Buick Regal Limited 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L Eng. VIN: K, FI, Naturally Aspirated, GAS
  • 1996 Buick Regal Custom 6 Cyl 3.1L Eng. VIN: M, FI, Naturally Aspirated, GAS
Product Details
Location : After Primary Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.6 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
Oxygen Sensor, Sold individually 4-wire
NTK®
Oxygen Sensor, Sold individually 4-wire
Part Number: NG21006
Guaranteed to Fit
$37.99
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.8L
  • 1996 Buick Regal Limited 6 Cyl 3.8L
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.1L
Product Details
Location : Before Catalytic ConverterNotes : Heated Sensor TypeType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 13.75 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 13474Warranty : NGK 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.

Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Walker Products®
Walker Products Original Equipment Base Sensor Oxygen Sensor, Sold individually 4-wire
Part Number: 25024012
Guaranteed to Fit
$41.49
Vehicle Fitment
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.8L
  • 1996 Buick Regal Limited 6 Cyl 3.8L
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.1L
Product Details
Location : Before Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.76 in. Wire LengthInterchange Part Number : ARBP960901Warranty : 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
Oxygen Sensor, Sold individually 4-wire
Delphi®
Oxygen Sensor, Sold individually 4-wire
Part Number: DELES20317
Guaranteed to Fit
$45.49
Vehicle Fitment
  • 1996 Buick Regal Limited 6 Cyl 3.8L
  • 1996 Buick Regal Olympic Gold Edition 6 Cyl 3.8L
  • 1996 Buick Regal Gran Sport 6 Cyl 3.8L
  • 1996 Buick Regal Custom 6 Cyl 3.1L
  • 1996 Buick Regal Custom 6 Cyl 3.8L
Product Details
Location : FrontType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 12.2 in. Wire LengthThread Size : 18 x 1.5 mm Thread SizeInterchange Part Number : 13474Warranty : 1-year or 12,000-mile Delphi 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.

Page 1 of 4 | Showing 1 - 15 of 50 results

Popular Products

Product Questions & Answers

Delphi Oxygen Sensor, Sold individually 4-wire
$45.49
Q:Will this O2 fit in the position Bank 1 Sensor 3?
Joe A.
A:BEST ANSWERHi Joe, I'm glad to assist you. For us to check carefully and be accurate on the part you need, please provide the complete details of your vehicle (year, make, model, submodel, 2WD/4WD/AWD, and engine size). The VIN would be helpful. You can also call our parts specialist (for real-time live & immediate assistance) on our toll-free number, 1-866-529-0412 (Mon to Sun). Show less
Jeonino E.
 
1 Question, 1 AnswerView all Q&As >

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.