OBD code P0135 indicates a malfunction in the O2 sensor heater circuit for Bank 1 Sensor 1. This means that the heating element in the O2 sensor located in the exhaust manifold of the first bank of cylinders is not functioning properly, which can lead to inaccurate sensor readings and potential emissions issues.
1. What are the possible symptoms ?
1. Check Engine Light illuminated
2. Decreased fuel efficiency
3. Rough idling or stalling
4. Poor acceleration
5. Failed emissions test
2. What are the most probable causes ?
1. Faulty oxygen sensor
2. Damaged wiring or connectors in the oxygen sensor heater circuit
3. Blown fuse for the oxygen sensor heater circuit
4. ECM or PCM (Engine Control Module/Powertrain Control Module) issue
5. Exhaust system leaks
6. Heat damage to the oxygen sensor heater circuit wiring
3. Is it safe to drive with this fault not fixed?
It is not recommended to drive with the OBD fault code P0135-O2 Sensor Heater Circuit –Bank 1 Sensor 1 as it can lead to decreased fuel efficiency and emissions.
4. What is the severity level of this faut code ?
The P0135 OBD code for the O2 Sensor Heater Circuit –Bank 1 Sensor 1 is not extremely severe but should be addressed promptly. It is a relatively common fault that can occur in vehicles with oxygen sensors.
5. How much will cost to repair this fault ?
The cost to repair OBD fault code P0135 can range from $150 to $300, depending on the vehicle make and model. This typically includes the cost of the O2 sensor and labor.
6. Troubleshooting – List of most reported fixes :
1. Check and replace the O2 sensor heater fuse if it’s blown.
2. Inspect and repair any damaged wiring or connections related to the O2 sensor heater circuit.
3. Replace the Bank 1 Sensor 1 O2 sensor if the heater element is found to be faulty.
7. What are the most affected components by this fault code ?
1. O2 sensor heater circuit
2. Engine management system
3. Exhaust system
4. Powertrain control module (PCM)
5. Electrical wiring and connectors
8. Several risks you may face if this issue is not fixed :
1. Reduced fuel efficiency and increased emissions.
2. Potential damage to the catalytic converter.
3. Engine performance issues such as rough idling or stalling.
4. Failure to pass emissions testing.
9. Most frequent questions people ask on AutoForums about this fault :
1. What does OBD fault code P0135 for the O2 sensor heater circuit mean?
– OBD fault code P0135 indicates a malfunction in the O2 sensor heater circuit for Bank 1 Sensor 1, which is responsible for maintaining the proper operating temperature of the oxygen sensor.
2. What are the common causes of OBD fault code P0135?
– Common causes of OBD fault code P0135 include a faulty oxygen sensor, damaged wiring or connectors, a blown O2 sensor heater fuse, or an issue with the engine control module (ECM).
3. How can I diagnose and troubleshoot OBD fault code P0135?
– To diagnose and troubleshoot OBD fault code P0135, you can start by checking the fuse, inspecting the wiring and connectors, testing the O2 sensor heater resistance, and scanning for any related ECM faults.
4. Can I drive with OBD fault code P0135?
– It’s generally not recommended to drive with OBD fault code P0135, as it can lead to decreased fuel efficiency, increased emissions, and potential damage to the catalytic converter.
5. How do I clear OBD fault code P0135?
– After addressing the underlying issue causing OBD fault code P0135, you can clear the code using an OBD-II scanner or by disconnecting the vehicle’s battery for a few minutes.
10. Diagnostic cautions and safety measures :
1. Ensure proper diagnostic procedures are followed to accurately identify and address the issue.
2. Check for any additional codes that may be related to the O2 sensor or its circuit.
3. Use caution when handling electrical components and connections to avoid causing further damage.
4. Verify that the O2 sensor heater circuit wiring is intact and not damaged.
5. Consider the environmental conditions that may impact the O2 sensor’s performance, such as extreme temperatures or exposure to contaminants.
6. Consult the vehicle’s service manual for specific testing procedures and electrical schematics.
7. Verify the power and ground circuits to the O2 sensor heater for proper voltage and continuity.
8. Keep safety in mind when testing the O2 sensor heater circuit, especially when dealing with potential electrical hazards.
9. Consider the age and condition of the O2 sensor and its heater element as potential contributors to the fault code.
This article was crafted using OBDQuest, the app that demystifies OBDII codes with clear explanations, fixes, and troubleshooting tips. Download OBDQuest from Google Play or the App Store. Subscription is at lowest price right now. Get started today and simplify your car diagnostics.
Fix My OBD2 