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2006 Nissan 350Z
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2006 Nissan 350Z

2006 Nissan 350Z Oxygen Sensors

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Before Catalytic Converter Oxygen Sensor 5-wire, Wideband Sensor
DriveWire
Before Catalytic Converter Oxygen Sensor 5-wire, Wideband Sensor
Part Number: REPS960910
Guaranteed to Fit
$46.46
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Base 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 23.6 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25025005Connector Gender : Male ConnectorIncludes : Includes installation instructionsWarranty : 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, Set of 4
DriveWire
Oxygen Sensor, Set of 4
Part Number: SET-REPI960904-4
Guaranteed to Fit
$87.49
Vehicle Fitment
  • 2006 Nissan 350Z Base 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Track 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
Product Details
Location : Before and After Catalytic Converter, Driver and Passenger SideComponents : (4) Oxygen SensorQuantity 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
Oxygen Sensor, 4-Wire, Heated
DriveWire
Oxygen Sensor, 4-Wire, Heated
Part Number: ARBN960913
Guaranteed to Fit
$22.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
Product Details
Location : Passenger Side - After Catalytic ConverterNotes : Downstream (After Catalytic converter)Type : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 19 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024403Connector 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, Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
DriveWire
After Catalytic Converter, Driver and Passenger Side Oxygen Sensors 4-wire, Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
Part Number: SET-ARBN960913
Guaranteed to Fit
$45.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Base 6 Cyl 3.5L Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L Engine Designation: VQ35DE, FI, Naturally Aspirated, GAS
Product Details
Location : After Catalytic Converter, Driver and 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 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 - After Catalytic Converter, Driver and Passenger Side
DriveWire
After Catalytic Converter, Driver and Passenger Side Oxygen Sensors 4-wire - After Catalytic Converter, Driver and Passenger Side
Part Number: SET-ARBN960913-4
Guaranteed to Fit
$69.49
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
Product Details
Location : After Catalytic Converter, Driver and Passenger SideComponents : (4) Oxygen SensorType : 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
After Catalytic Converter, Driver Side Oxygen Sensor, 4-Wire, Heated
DriveWire
After Catalytic Converter, Driver Side Oxygen Sensor, 4-Wire, Heated
Part Number: REPI960904
Guaranteed to Fit
$26.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
Product Details
Location : Driver Side - After Catalytic ConverterNotes : Downstream (After Catalytic converter)Type : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024448Connector 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 5-wire
NTK®
Before Catalytic Converter Oxygen Sensor, Sold individually 5-wire
Part Number: NG24320
Guaranteed to Fit
$108.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
Product Details
Location : Before Catalytic ConverterNotes : 0.38 in. Thread Length; Heated Sensor TypeType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 23.5 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Non-flanged Mounting StyleWarranty : 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.

OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Bosch®
OE Replacement Series Oxygen Sensor, Sold individually 4-wire
Part Number: BS15522
Guaranteed to Fit
$79.49
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L OE sensor technology
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L OE sensor technology
  • 2006 Nissan 350Z Base 6 Cyl 3.5L OE sensor technology
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L OE sensor technology
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L OE sensor technology
Product Details
Location : Downstream, Passenger SideType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 15.9 in. Wire LengthInterchange Part Number : 2344210Warranty : 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
Before Catalytic Converter Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 5-wire
Walker Products®
Before Catalytic Converter Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 5-wire
Part Number: WKP35035009
Guaranteed to Fit
$81.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Base 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L Enginedesignationname: VQ35DE, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : Wideband sensorType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 23.62 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: NP2344312
Guaranteed to Fit
$87.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Base 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L O.E. Quality Replacement Sensor
Product Details
Location : After Catalytic Converter, Passenger SideType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitInterchange Part Number : 15730, SG300Warranty : 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.

Before Catalytic Converter Oxygen Sensor, Sold individually 5-wire
Denso®
Before Catalytic Converter Oxygen Sensor, Sold individually 5-wire
Part Number: NP2345061
Guaranteed to Fit
$107.49
Vehicle Fitment
  • 2006 Nissan 350Z Base 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Track 6 Cyl 3.5L O.E. Quality Replacement Sensor
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L O.E. Quality Replacement Sensor
Product Details
Location : Before Catalytic ConverterType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 20.5 in. Wire LengthInterchange Part Number : 2344210Warranty : 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.

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: 25024403
Guaranteed to Fit
$65.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
Product Details
Location : Passenger Side - After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.9 in. Wire LengthInterchange Part Number : ARBN960913Warranty : 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
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: WKP35034384
Guaranteed to Fit
$39.99
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L Eng. Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L Eng. Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L Eng. Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Base 6 Cyl 3.5L Eng. Designation: VQ35DE, FI, Naturally Aspirated, GAS
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L Eng. Designation: VQ35DE, FI, Naturally Aspirated, GAS
Product Details
Location : Passenger Side, After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 18.9 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: NG24408
Guaranteed to Fit
$93.49
Vehicle Fitment
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
Product Details
Location : Passenger Side, After Catalytic ConverterNotes : Heated Sensor TypeType : 4-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 14.5 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 2344210Warranty : 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.

Upstream OE Replacement Series Oxygen Sensor, Sold individually 5-wire
Bosch®
Upstream OE Replacement Series Oxygen Sensor, Sold individually 5-wire
Part Number: BS15667
Guaranteed to Fit
$110.49
Vehicle Fitment
  • 2006 Nissan 350Z Base 6 Cyl 3.5L
  • 2006 Nissan 350Z Touring 6 Cyl 3.5L
  • 2006 Nissan 350Z Enthusiast 6 Cyl 3.5L
  • 2006 Nissan 350Z Track 6 Cyl 3.5L
  • 2006 Nissan 350Z Grand Touring 6 Cyl 3.5L
Product Details
Location : UpstreamType : 5-wireQuantity Sold : Sold individuallyProduct Fit : Direct FitWire Length : 22 in. Wire LengthWarranty : 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
Page 1 of 4 | Showing 1 - 15 of 54 results

Top Rated Products

DriveWire Oxygen Sensor, 4-Wire, Heated
$22.99( Review)
Great product
Laventrice P.
VERIFIED PURCHASER
DriveWire Before Catalytic Converter Oxygen Sensor 5-wire, Wideband Sensor
$46.46( Review)
Part was exactly as described. Great pricing! I would recommend to anyone.
La Motors L.
VERIFIED PURCHASER

Popular Products

Product Questions & Answers

Bosch Upstream OE Replacement Series Oxygen Sensor, Sold individually 5-wire
$110.49
Q:I have a Infiniti 2004 change the sensor twice check engine light still come on will this sensor work dealer want 297 ? Show Less
Thomas E.
A:BEST ANSWERHi Tom, thank you for reaching out. We are unable to answer your question accurately due to a lack of information. Kindly call our parts team at 1-866-529-0412 and tell us more about your vehicle. Hope to hear from you soon. Show less
Aldrin P.
 
1 Question, 1 AnswerView all Q&As >
Walker Products Walker Products Aftermarket Base Sensor Oxygen Sensor, Sold individually 4-wire
$39.99
Q:where do wkp35034384 goes at rear or front catalic converter ?
Donyae B.
A:BEST ANSWERHi Donyae, thank you for reaching out. This is a downstream sensor. It's located at the rear of the converter. Use the link below to order the part and take advantage of the sale price. Have a good one. https://www.carparts.com/oxygen-sensor/walker-products/wkp35034384?can=cpab2020 Show less
Andrew B.
 
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.