P0135 Hyundai Code - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
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 Hyundai indicates O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1.
- 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 Hyundai 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 Hyundai?
- 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 Hyundai?
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
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0135 Hyundai 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 Hyundai Code
What does the OBD-II code P0135 mean on a Hyundai?
Code P0135 indicates a malfunction in the oxygen sensor heater circuit for Bank 1 Sensor 1, which monitors the air-fuel mixture in the exhaust.
What are the symptoms of code P0135 in a Hyundai?
Symptoms may include the check engine light turning on, increased fuel consumption, poor engine performance, or failed emissions tests.
What causes the P0135 code in a Hyundai?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module (ECM).
Can I drive my Hyundai with the P0135 code?
While it may be safe to drive for a short time, ignoring the issue can lead to reduced fuel efficiency and potential damage to the catalytic converter.
How do I diagnose the P0135 code in a Hyundai?
Start by inspecting the oxygen sensor wiring and connectors for damage, checking fuses, and testing the oxygen sensor heater circuit with a multimeter.
How is the P0135 code fixed in a Hyundai?
Repairs typically involve replacing the faulty oxygen sensor, repairing damaged wiring, or addressing issues with the ECM or related circuits.
How much does it cost to fix the P0135 code in a Hyundai?
Repair costs can range from $150 to $400, depending on whether the oxygen sensor needs replacement or if additional wiring repairs are required.
Which oxygen sensor does the P0135 code refer to?
The code refers to Bank 1 Sensor 1, which is the oxygen sensor located upstream (before the catalytic converter) on the engine's first bank.
Can a dirty air filter cause the P0135 code in a Hyundai?
No, a dirty air filter is unlikely to cause this code, as it specifically relates to the oxygen sensor heater circuit.
How do I prevent the P0135 code from recurring in my Hyundai?
Regular maintenance, such as inspecting and replacing oxygen sensors at recommended intervals and ensuring wiring is intact, can help prevent this issue.
Discuss the causes and fixes for P0135 Hyundai OBDII Code
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Disculpe: ¿En dónde se ubica el fusible del sensor de oxígeno
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