P0135 Nissan Code - HO2S11 Heater Circuit Fault
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 Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground. 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
- P0135 Nissan indicates HO2S11 Heater Circuit Fault.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground.
- 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.
Code P0135 Nissan 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 P0135 Nissan?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0135 Nissan?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 Nissan 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.
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Frequently Asked Questions about P0135 Nissan Code
1. What does the OBDII code P0135 mean on a Nissan?
P0135 indicates a fault in the heater circuit of the upstream oxygen sensor (HO2S11) located before the catalytic converter on Bank 1.
2. What are the common symptoms of code P0135 on a Nissan?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, longer warm-up times, and potentially increased emissions.
3. What causes the P0135 code to appear on a Nissan?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or an issue with the engine control module (ECM).
4. Can I drive my Nissan with a P0135 code?
Yes, but it is not recommended to ignore the issue, as it can lead to reduced fuel efficiency and potentially damage the catalytic converter over time.
5. How do I fix the P0135 code on a Nissan?
Repairs may involve replacing the upstream oxygen sensor, checking and repairing any damaged wiring or connectors, or replacing a blown fuse.
6. How do I diagnose the P0135 code on a Nissan?
Start by inspecting the oxygen sensor's wiring and connectors for damage, testing the sensor's resistance, and checking the vehicle's fuses related to the circuit.
7. What is the heater circuit in an oxygen sensor?
The heater circuit warms up the oxygen sensor quickly to ensure it operates efficiently, especially during cold starts.
8. How much does it cost to fix a P0135 code on a Nissan?
Repair costs can range from $150 to $400, depending on whether the issue is with the sensor itself or related wiring or components.
9. Can a bad oxygen sensor cause the P0135 code?
Yes, a faulty oxygen sensor is one of the most common causes of the P0135 code.
10. Will clearing the P0135 code fix the problem?
Clearing the code may temporarily turn off the check engine light, but the issue will return unless the underlying cause is resolved.
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