P0155 Cadillac Code - HO2S Heater Performance Bank 2 Sensor 1
Quick Answer
The P0155 code for Cadillac refers to a problem with the HO2S (Heated Oxygen Sensor) heater circuit for Bank 2 Sensor 1. Common causes include Faulty oxygen sensor heater element, Wiring or connector issues in the oxygen sensor circuit, Blown fuse related to the oxygen sensor. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0155 Cadillac indicates HO2S Heater Performance Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty oxygen sensor heater element, Wiring or connector issues in the oxygen sensor circuit, Blown fuse related to the oxygen sensor.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0155 Cadillac Description
The P0155 code for Cadillac refers to a problem with the HO2S (Heated Oxygen Sensor) heater circuit for Bank 2 Sensor 1. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and sending this information to the engine control module to adjust the air-fuel mixture for optimal combustion. The heater element in the sensor helps it reach operating temperature faster for improved accuracy.
Common Causes of P0155 Cadillac
- Faulty oxygen sensor heater element
- Wiring or connector issues in the oxygen sensor circuit
- Blown fuse related to the oxygen sensor
- Engine control module (ECM) malfunction
- Exhaust leak affecting the sensor's readings
Symptoms of P0155 Cadillac
- Decreased fuel efficiency
- Rough idling
- Hesitation during acceleration
- Check Engine Light illuminated
How to Fix P0155 Cadillac
- Diagnose the issue by using a scan tool to verify the P0155 code and checking the oxygen sensor's heater circuit for faults.
- Inspect the wiring and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
- Test the oxygen sensor's heater element for proper functioning and replace if found to be faulty.
- Check the fuse related to the oxygen sensor and replace if blown.
- Clear the code from the ECM's memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0155 Cadillac
The typical repair costs for addressing a P0155 code on a Cadillac can range from $150 to $400, including parts and labor. However, specific costs may vary depending on the location, vehicle make and model, and the shop's labor rates. It is recommended to contact local auto repair shops for accurate estimates.
Tech Notes for P0155 Cadillac
Need more information about the P0155 Cadillac code?
Need more information on how to fix the P0155 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0155 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0155 Cadillac Code
No Frequently Asked Questions about P0155 Cadillac Code found.
Discuss the causes and fixes for P0155 Cadillac OBDII Code
Code P0155 Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.