P1198 Code - O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty O2 Sensor, O2 Sensor harness is open or shorted, O2 Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1198 indicates O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction.
- Common causes
- Common causes include Faulty O2 Sensor, O2 Sensor harness is open or shorted, O2 Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1198 Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P1198?
- Faulty O2 Sensor
- O2 Sensor harness is open or shorted
- O2 Sensor circuit poor electrical connection
How to Fix the DTC P1198?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1198 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1198 code?
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Need Help with the Code?
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Information for Specific Makes
- P1198 Audi — O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction
- P1198 BMW — Differential Pressure Sensor Intake Manifold Signal
- P1198 Buick — Exhaust Gas Temperature Sensor 5 Performance Engine Running
- P1198 Cadillac — Exhaust Gas Temperature Sensor 5 Performance Engine Running
- P1198 Chevrolet — Exhaust Gas Temperature Sensor 5 Performance Engine Running
- P1198 Chrysler — Radiator Temp Sensor Input Too High
- P1198 Dodge — Radiator Temp Sensor Input Too High
- P1198 Ford — Pump Rotor Control Underfueling
- P1198 GMC — Exhaust Gas Temperature Sensor 5 Performance Engine Running
- P1198 MINI — Differential Pressure Sensor Intake Manifold Signal
- P1198 Volkswagen — O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction
Frequently Asked Questions about P1198 Code
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