2007 Subaru Impreza Oxygen Sensors

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Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L
DriveWire
Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L
Part Number: REPS960913
Guaranteed to Fit
$49.62
Vehicle Fitment
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L B1S1
Product Details
Location : Before Catalytic ConverterType : 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 : 25054027Connector 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
After Catalytic Converter Oxygen Sensor, EJ257 Engine, Turbocharged, GAS, B1S2, Sold Individually, 4-wire, 2.5L 4Cyl
DriveWire
After Catalytic Converter Oxygen Sensor, EJ257 Engine, Turbocharged, GAS, B1S2, Sold Individually, 4-wire, 2.5L 4Cyl
Part Number: REPS960907
Guaranteed to Fit
$19.49
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L EJ257 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L EJ257 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
Product Details
Location : After Catalytic ConverterType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 21.26 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25024440Connector 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, 4-Wire, Heated, Air Fuel Ratio Sensor, 4 Cyl., 2.5L Engine
DriveWire
Before Catalytic Converter Oxygen Sensor, 4-Wire, Heated, Air Fuel Ratio Sensor, 4 Cyl., 2.5L Engine
Part Number: REPS960909
Guaranteed to Fit
$49.99
Vehicle Fitment
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L B1S1
Product Details
Location : Before Catalytic ConverterNotes : Air/Fuel sensorType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 30.7 in. Wire LengthThread Size : M18-1.5 Thread SizeMounting Style : Threaded-in Mounting StyleHex Size : 7/8 in. Hex SizeInterchange Part Number : 25054058Connector 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 Oxygen Sensor, B1S2, Set of 2, 4-wire, 4 Cyl 2.5L
DriveWire
Before and After Catalytic Converter Oxygen Sensor, B1S2, Set of 2, 4-wire, 4 Cyl 2.5L
Part Number: SET-REPS960907-2
Guaranteed to Fit
$62.99
Vehicle Fitment
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
Product Details
Location : Before And After Catalytic ConverterComponents : (2) Oxygen SensorType : 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 SizeInterchange Part Number : 25024440, 25054027Warranty : 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 Oxygen Sensor, Set of 2, 4-wire, 4, 2.5
DriveWire
Before and After Catalytic Converter Oxygen Sensor, Set of 2, 4-wire, 4, 2.5
Part Number: SET-REPS960909-2
Guaranteed to Fit
$63.49
Vehicle Fitment
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L B1S1
Product Details
Location : Before And After Catalytic ConverterComponents : (2) Oxygen SensorType : 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 SizeInterchange Part Number : 25024440, 25054058Warranty : 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 Oxygen Sensor, EJ257 Engine, Turbocharged, GAS, B1S2, Sold Individually, 4-wire, 2.5L 4Cyl, Walker Products Original Equipment Base Sensor - After Catalytic Converter
Walker Products®
After Catalytic Converter Oxygen Sensor, EJ257 Engine, Turbocharged, GAS, B1S2, Sold Individually, 4-wire, 2.5L 4Cyl, Walker Products Original Equipment Base Sensor - After Catalytic Converter
Part Number: 25024440
Guaranteed to Fit
$66.99
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L EJ257 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L EJ253 Engine, Naturally Aspirated, GAS, B1S2
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L EJ257 Engine, Turbocharged, GAS, B1S2
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L EJ255 Engine, Turbocharged, GAS, B1S2
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 27.56 in. Wire LengthInterchange Part Number : ARBS960916, 15730, 2344732Warranty : 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
After Catalytic Converter Oxygen Sensor, Eng. Designation: EJ257, FI, Turbocharged, GAS, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Aftermarket Base Sensor - After Catalytic Converter
Walker Products®
After Catalytic Converter Oxygen Sensor, Eng. Designation: EJ257, FI, Turbocharged, GAS, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Aftermarket Base Sensor - After Catalytic Converter
Part Number: WKP35034322
Guaranteed to Fit
$56.49
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L Eng. Designation: EJ257, FI, Turbocharged, GAS
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L Eng. Designation: EJ253, FI, Naturally Aspirated, GAS
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L Eng. Designation: EJ253, FI, Naturally Aspirated, GAS
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L Eng. Designation: EJ257, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
Product Details
Location : After Catalytic ConverterNotes : HeatedType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 27.56 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
Before Catalytic Converter Oxygen Sensor, Eng. Designation: EJ253, FI, Naturally Aspirated, GAS, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Aftermarket Base Sensor
Walker Products®
Before Catalytic Converter Oxygen Sensor, Eng. Designation: EJ253, FI, Naturally Aspirated, GAS, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Aftermarket Base Sensor
Part Number: WKP35064005
Guaranteed to Fit
$96.99
Vehicle Fitment
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L Eng. Designation: EJ253, FI, Naturally Aspirated, GAS
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L Eng. Designation: EJ253, FI, Naturally Aspirated, GAS
Product Details
Location : Before Catalytic ConverterNotes : Air/Fuel sensorType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 22.64 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
Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Original Equipment Base Sensor
Walker Products®
Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Original Equipment Base Sensor
Part Number: WKP25054058
Guaranteed to Fit
$128.46
Vehicle Fitment
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L B1S1
Product Details
Location : Before Catalytic ConverterNotes : Air/Fuel sensorType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 31.5 in. Wire LengthInterchange Part Number : REPS960909Warranty : 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
Rear Oxygen Sensor, Sold individually, 4-wire, 4 Cyl 2.5L - Rear
Delphi®
Rear Oxygen Sensor, Sold individually, 4-wire, 4 Cyl 2.5L - Rear
Part Number: DELES20219
Guaranteed to Fit
$72.49
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L
Product Details
Location : RearType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 27.56 in. Wire LengthThread Size : 18 x 1.5 mm Thread SizeInterchange Part Number : 15730, SG300Warranty : 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.

After Catalytic Converter Oxygen Sensor, Sold individually, 4-wire
NTK®
After Catalytic Converter Oxygen Sensor, Sold individually, 4-wire
Part Number: NG24642
Guaranteed to Fit
$79.99
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L
Product Details
Location : After Catalytic ConverterNotes : Heated Sensor TypeType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 27.5 in. wire lengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleInterchange Part Number : 2344212Warranty : 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.

Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Original Equipment Base Sensor
Walker Products®
Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L, Walker Products Original Equipment Base Sensor
Part Number: 25054027
Guaranteed to Fit
$133.99
Vehicle Fitment
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L B1S1
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L B1S1
Product Details
Location : Before Catalytic ConverterNotes : Air/Fuel sensorType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 22.64 in. Wire LengthInterchange Part Number : REPS960913Warranty : 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
After Catalytic Converter Naturally Aspirated, SOHC, GAS, Oxygen Sensor Compatible with 234-4732, Sold individually, 2.5L
Aceon®
After Catalytic Converter Naturally Aspirated, SOHC, GAS, Oxygen Sensor Compatible with 234-4732, Sold individually, 2.5L
Part Number: ACB88263814
Guaranteed to Fit
$66.63
Vehicle Fitment
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L Turbocharged, DOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L Naturally Aspirated, SOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L Naturally Aspirated, SOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L Turbocharged, DOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L Turbocharged, DOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L Turbocharged, DOHC, GAS, Oxygen Sensor Compatible with 234-4732
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L Turbocharged, DOHC, GAS, Oxygen Sensor Compatible with 234-4732
Product Details
Location : After Catalytic ConverterQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWarranty : Aceon 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, 4, 2.5
NTK®
Oxygen Sensor, Sold individually, 4-wire, 4, 2.5
Part Number: NG24696
Guaranteed to Fit
$124.99
Vehicle Fitment
  • 2007 Subaru Impreza Outback Sport 4 Cyl 2.5L Naturally Aspirated
  • 2007 Subaru Impreza 2.5i 4 Cyl 2.5L Naturally Aspirated
Product Details
Location : Before Catalytic ConverterNotes : 0.38 in. Thread Length; Heated Sensor TypeType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 22.8 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Non-flanged Mounting StyleInterchange Part Number : 2344212Warranty : 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.

Before Catalytic Converter Oxygen Sensor, Sold individually, 4-wire, 4, 2.5, Walker Products Aftermarket Base Sensor
Walker Products®
Before Catalytic Converter Oxygen Sensor, Sold individually, 4-wire, 4, 2.5, Walker Products Aftermarket Base Sensor
Part Number: WKP35064021
Guaranteed to Fit
$101.49
Vehicle Fitment
  • 2007 Subaru Impreza WRX TR 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX STI 4 Cyl 2.5L Eng. Designation: EJ257, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX Limited 4 Cyl 2.5L Eng. Designation: EJ255, FI, Turbocharged, GAS
  • 2007 Subaru Impreza WRX STI Limited 4 Cyl 2.5L Eng. Designation: EJ257, FI, Turbocharged, GAS
Product Details
Location : Before Catalytic ConverterNotes : Air/Fuel sensorType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWire Length : 31.5 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 42 results

Top Rated Products

DriveWire Before Catalytic Converter Oxygen Sensor, B1S1, Sold individually, 4-wire, 4 Cyl 2.5L
$61.99( Review)
Works at a great price. Does not have the heat shield as the OEM had. Hopefully lastsSee More
Anonymous
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.