The code P013D: Oxygen Sensor Circuit Slow Response in Bank 2 Sensor 2 indicates a problem with the oxygen sensor located downstream in the exhaust system, on the side of the engine that does not include Cylinder 1 (Bank 2). This code typically points to a slow response from the sensor, which is often caused by a faulty sensor or issues with the sensor’s wiring or connections.
P013D quick overview
| Meaning | O2 Sensor Slow Response – Lean to Rich (Bank 2 Sensor 2) |
| Is it serious? | Yes, if left unaddressed, it can lead to poor fuel economy and possible damage to other engine components over time. |
| Possible causes | -Faulty downstream oxygen sensor (Bank 2 Sensor 2) -Damaged or corroded wiring or connectors -Exhaust leaks near the sensor -Contaminated or worn-out oxygen sensor |
| How to diagnose? | Begin with a visual inspection of wiring harnesses and connectors, especially near exhaust components. Search for technical service bulletins (TSBs) related to this code for additional guidance. Retrieve and record all stored trouble codes and freeze frame data using a diagnostic scanner. Clear the codes and monitor the O2 sensor input data during engine idle to observe voltage fluctuations. Use a DVOM to test resistance of the O2 sensor, as well as check voltage and ground signals. Disconnect related controllers before testing system circuit resistance to prevent control module damage. |
P013D Meaning
In simpler terms, the P013D code means that the oxygen sensor in your vehicle’s exhaust system is not responding as quickly as it should. This sensor helps the engine control its fuel mixture, so when it doesn’t work properly, it can lead to poor fuel efficiency and reduced engine performance. Fixing it usually involves replacing the sensor, which can restore your engine’s performance.
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How to fix P013D – learn from mechanics
I looked into P013D service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: GMC P013D
Vehicle Information GMC Sierra 1500, 2015, V8 engine
Issue + Repair History
- Engine experiencing lowered fuel efficiency
- General lack of engine performance
- Service engine soon lamp illuminated
Other OBD2 Codes + Test Results
- No other OBD2 codes mentioned
- Diagnostic scanner, digital volt/ohmmeter (DVOM), and vehicle information source used for diagnosis
Mechanic Suggestions
- Begin with a visual inspection of wiring harnesses and connectors, focusing on areas near hot exhaust pipes and manifolds
- Search for technical service bulletins (TSB) matching symptoms and codes to aid diagnosis
- Retrieve and record all stored trouble codes and freeze frame data using a diagnostic scanner
- Clear codes and monitor O2 sensor input data during engine idle to observe voltage fluctuations
- Use DVOM to check resistance of the O2 sensor, as well as voltage and ground signals
- Disconnect related controllers before testing system circuit resistance to prevent control module damage
Final Fix
- Replace faulty downstream oxygen (O2) sensor (Bank 2 Sensor 2) with a new one
- Ensure proper installation and connection of the new sensor
- Clear stored trouble codes and verify proper engine performance after repair
Case #2: Chevrolet P013D
Vehicle Information Chevrolet Camaro SS, 2018, V8 engine
Issue + Repair History
- Lowered fuel efficiency observed
- Engine performance lacking
- Service engine soon lamp illuminated
Other OBD2 Codes + Test Results
- No other OBD2 codes mentioned
- Diagnosis conducted using diagnostic scanner, digital volt/ohmmeter (DVOM), and vehicle information source
Mechanic Suggestions
- Conduct visual inspection of wiring harnesses and connectors, paying attention to areas near hot exhaust components
- Refer to technical service bulletins (TSB) to identify potential matches for symptoms and codes
- Retrieve and document all stored trouble codes and freeze frame data using diagnostic scanner
- Clear codes and monitor O2 sensor input data during engine idle to assess voltage fluctuations
- Utilize DVOM to check resistance of the O2 sensor, as well as voltage and ground signals
- Disconnect related controllers before testing system circuit resistance to prevent control module damage
Final Fix
- Replace malfunctioning downstream oxygen (O2) sensor (Bank 2 Sensor 2) with a new, functioning unit
- Ensure proper installation and connection of the new sensor
- Clear stored trouble codes and verify improved engine performance after repair
Case #3: Dodge P013D
Vehicle Information Dodge Charger SRT Hellcat, 2020, V8 engine
Issue + Repair History
- Reduced fuel efficiency experienced
- Engine performance degradation noted
- Service engine soon light activated
Other OBD2 Codes + Test Results
- No additional OBD2 codes reported
- Diagnosis conducted using diagnostic scanner, digital volt/ohmmeter (DVOM), and vehicle information source
Mechanic Suggestions
- Perform visual inspection of wiring harnesses and connectors, especially those in proximity to high-temperature exhaust components
- Consult technical service bulletins (TSB) for relevant information matching symptoms and codes
- Retrieve and document all stored trouble codes and freeze frame data using diagnostic scanner
- Clear codes and monitor O2 sensor input data during engine idle to assess voltage fluctuations
- Use DVOM to test resistance of the O2 sensor, as well as voltage and ground signals
- Disconnect related controllers before testing system circuit resistance to avoid potential control module damage
Final Fix
- Replace malfunctioning downstream oxygen (O2) sensor (Bank 2 Sensor 2) with a new, functioning unit
- Ensure proper installation and connection of the new sensor
- Clear stored trouble codes and verify restored engine performance after repair
How to diagnose P013D
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko