Nissan Skyline V35 with motor VQ35DE is a legendary Japanese sedan, but even it is not immune to problems with electronics. One of the most common mistakes that owners encounter is P1135 ("Heated Oxygen Sensor Bank 1 Sensor 1"). This code indicates a malfunction in the oxygen sensor heating circuit, but often the problem lies deeper - in the fuel system, ECU firmware or mechanical damage.

In this article we will look at what exactly causes P1135 on Skyline V35, how to correctly diagnose the problem (including nuances for models with MAT And MAT+CAT systems), and give step-by-step repair instructions. We will pay special attention to typical mistakes when replacing sensors and why sometimes Replacing the lambda probe does not solve the problem - a faulty injector or air leakage through the intake manifold gasket may be to blame.

What does error P1135 mean on Nissan Skyline V35

Code P1135 refers to heating circuits of the first oxygen sensor (Bank 1, Sensor 1) - what is installed before the catalyst. In the documentation Nissan it stands for "AF Sensor Heater Circuit Malfunction"(malfunction of the heating element of the air-fuel mixture sensor). However, in practice, the reason may be not only in the sensor itself, but also in:

  • 🔋 Open or short circuit in the wiring of the heating element.
  • 🛢️ Rich/lean fuel mixture, due to which the ECU records false readings.
  • 🔥 Sensor overheating (for example, due to a faulty catalyst).
  • 💻 ECU firmware failure, especially after chip tuning.

On Skyline V35 with motor VQ35DE sensor Bank 1 Sensor 1 located on exhaust manifold on the 1st cylinder side. Its task is to transmit data on the oxygen content in the exhaust gases to adjust the fuel supply. If the sensor heating element does not work, the ECU records an error P1135 and can put the engine into emergency mode (Open Loop).

⚠️ Attention: On models with the system MAT+CAT (For example, Skyline 350GT Coupe) error P1135 often accompanied by code P0130 - this indicates a complex problem with the oxygen sensors. In this case, a check is required everyone lambda probes and catalyst.

Symptoms of error P1135: how it manifests itself on Skyline V35

Error P1135 rarely leads to a complete stop of the engine, but ignoring it is fraught with accelerated wear of the catalyst and increased fuel consumption. Main features:

  • ⚠️ Check Engine lights up on the dashboard (sometimes flashes when you press the gas sharply).
  • 🛑 Dips during acceleration, especially at 2500–3500 RPM.
  • 💨 Increased fuel consumption (1–2 liters per 100 km).
  • 🔊 Unstable idle (speeds fluctuate in the range of 600–900 RPM).
  • 🌡️ Smell of gasoline from the exhaust pipe (indicates rich mixture).

On Skyline V35 with automatic transmission (RE5R05A) error P1135 may cause delays when shifting gears — The transmission ECU receives incorrect data about the engine load. In rare cases, the car goes into "limp mod"(speed limit to 3000 RPM).

📊 How often do you encounter error P1135?
  • First time
  • Regularly (once a month)
  • Only after refueling at questionable gas stations
  • After chip tuning
  • Other

If the error appears only on a cold engine, the problem is most likely in sensor heating element. If P1135 Fixed when the engine is warm - the fuel mixture or mechanical damage is to blame (for example, a crack in the exhaust).

Causes of error P1135: from sensor to ECU firmware

On Nissan Skyline V35 code P1135 can be caused by either simple wear of the sensor or serious problems with the engine. Let's consider all possible reasons in order:

Reason How to diagnose Difficulty of repair
Faulty oxygen sensor (AF Sensor) Checking the heater resistance (should be 2–10 ohms). Inspection for mechanical damage. ⭐⭐ (sensor replacement)
Break or short circuit in the wiring Testing the circuit with a multimeter. Checking connectors for oxidation. ⭐⭐⭐ (requires access to wiring harness)
Rich/lean fuel mixture Diagnostics with a scanner (check Long Term Fuel Trim). Checking injectors, mass air flow sensor, fuel pressure. ⭐⭐⭐⭐ (comprehensive diagnostics)
Faulty catalyst Visual inspection (melting of honeycombs). Checking the back pressure in the outlet. ⭐⭐⭐⭐⭐ (catalyst replacement)
ECU firmware failure Checking logs with a scanner. Test after resetting adaptations. ⭐⭐⭐⭐ (flashing)

Especially often P1135 appears after:

  • 🔧 Exhaust system replacement (for example, installing a 4-2-1 spider without adjusting the firmware).
  • ⛽ Refueling with low quality fuel (leads to deposits on the sensor).
  • 💻 Chip tuning (incorrect fuel maps cause false errors).
💡

If the error P1135 appears after washing the engine, check the sensor connector for moisture. Dry the contacts with a hairdryer and treat WD-40 Contact Cleaner.

Diagnosing error P1135: step-by-step instructions

To pinpoint the cause P1135, you will need a scanner (for example, Launch CReader or ELM327) and a multimeter. Follow this algorithm:

  1. Count all errors.

    Sometimes P1135 accompanied by codes P0171/P0172 (lean/rich mixture) or P0420 (low catalyst efficiency). This will narrow down your search.

  2. Check the oxygen sensor.

    Measure the resistance of the heater (contacts 3 And 4 on the sensor connector). Norm: 2–10 ohms. If there is no resistance - a break, if close to 0 ohm - short circuit.

  3. Ring the wiring.

    Disconnect the sensor connector and check the heater circuit for an open or ground/power short. Connection diagram for VQ35DE:

    Контакт 3 (Heater +) → ЭБУ (pin 45)

    Контакт 4 (Heater -) → Масса (pin 101)

  4. Check the fuel mixture.

    Use a scanner to check the parameters Short Term Fuel Trim (STFT) And Long Term Fuel Trim (LTFT). If the values exceed ±10%, the problem is in the fuel supply (injectors, mass air flow sensor, air leaks).

Test the heater circuit with a multimeter|Inspect the connector for oxidation|Reset the fuel system adaptations|Check the fuel pressure (normal: 3.5–4.0 bar)|Assess the condition of the catalyst (visually or through a scanner)-->

⚠️ Attention: On Skyline V35 with the system Nissan Direct Ignition System (NDIS) error P1135 may appear due to faulty ignition coils. Before replacing the sensor, check the spark on all cylinders!

How to fix error P1135: from simple to complex

Depending on the cause, repair methods vary from a banal sensor replacement to a comprehensive engine repair. Let's start with the simplest solutions:

1. Replacing the oxygen sensor (AF Sensor)

If the diagnostics showed a malfunction of the heating element, the sensor must be replaced. For Nissan Skyline V35 fit original parts:

  • Original: 22690-AL50A (Denso) or 22690-AL50B (Hitachi).
  • Analogues: Bosch 0 258 006 537, NGK NTK 25177.

When replacing, use wheel chocks and let the engine cool down - the sensor is screwed into the exhaust manifold, which heats up to 600°C+.

2. Wiring repair

If the problem is an open circuit or short circuit, restore the circuit:

  • 🔧 Strip and solder damaged wires.
  • 🛠️ Replace the sensor connector (part number: 22690-4M000).
  • 🧴 Process contacts contact lubricant (For example, Liqui Moly Kontakt-Spray).

3. Cleaning injectors and throttle valves

If the error is caused by a rich/lean mixture:

  • 💉 Wash the injectors with ultrasound or liquid Wynn's Injector Cleaner.
  • 🌀 Clean the throttle body (use CRC Throttle Body Cleaner).
  • 🔍 Check it out intake manifold gasket for air leaks (a typical problem after 150,000 km).
What should I do if the error remains after replacing the sensor?

If P1135 has not disappeared, check:

1. **ECU firmware** - fuel maps may need to be adjusted (especially after chip tuning).

2. **Catalyst** - melted honeycomb can block the flow of exhaust gases, causing the sensor to give false readings.

3. **Engine weight** - oxidized contacts on the body or battery lead to unstable operation of the electronics.

4. **MAF Sensor** - if it is dirty, the ECU incorrectly calculates the load on the engine.

4. Flashing the ECU

On Skyline V35 with firmware for EcuTek or UpRev error P1135 may be caused by incorrect fuel maps. Solutions:

  • 💻 Return the stock firmware and check the error.
  • 📊 Adjust Fuel Maps in the program EcuFlash (experience required!).
  • 🔄 Reset adaptations via scanner (command: ECU Reset).

Common mistakes when repairing P1135

Many owners Skyline V35 make the same mistakes when trying to eliminate P1135. That's what can't do:

  • 🚫 Ignore related errors. For example, if together with P1135 There is P0300 (misfires), you first need to eliminate the misfires, and not change the sensor.
  • 🚫 Install non-original sensors. Cheap analogues (for example, no-name from AliExpress) often fail after 10–20 thousand km.
  • 🚫 Don't check the wiring. Even a new sensor will generate an error if there is an open circuit in the heater circuit.
  • 🚫 Reset the error without eliminating the cause. The ECU will lock again P1135 after 1–2 startup cycles.
⚠️ Attention: On Skyline V35 with 6-speed manual transmission (FS6R31A) error P1135 may mask the problem with throttle position sensor (TPS). Before replacing the lambda probe, check the voltage at TPS (should change smoothly from 0.5V to 4.5V when you press the gas).

Prevention of error P1135 on Nissan Skyline V35

To avoid reappearance P1135, follow these guidelines:

  • ⛽ Refuel at proven gas stations. Bad gasoline leads to deposits on the sensor and catalyst.
  • 🔧 Change the air filter every 15,000 km. A clogged filter causes a lean mixture.
  • 💨 Check the crankcase ventilation system. Clogged PCV valve causes oil to enter the intake.
  • 🔥 Monitor engine temperature. Overheating destroys the catalyst and sensors.
  • 💻 Update the ECU firmware. For VQ35DE current software version - v8.006 (fixes bugs with fuel maps).
💡

On Skyline V35 with mileage over 200,000 km error P1135 often indicates wear rings or valve stem seals — oil enters the combustion chamber and contaminates the sensor. In this case, a compression test is required.

FAQ: Frequently asked questions about error P1135

Is it possible to drive with error code P1135?

Short term - yes, but not recommended. Driving for a long time with a faulty oxygen sensor leads to:

  • Increased fuel consumption (up to +20%).
  • Overheating of the catalyst and its melting.
  • Accelerated wear of spark plugs.

If the error appears for the first time, you can go to a service station, but it is better not to delay diagnosis.

How much does it cost to replace an oxygen sensor on a Skyline V35?

Prices depend on sensor type and region:

  • Original sensor (Denso/Hitachi): 8 000–12 000 ₽.
  • Analogue (Bosch/NGK): 4 000–7 000 ₽.
  • Replacement work: 1,500–3,000 ₽ (depending on the complexity of access).

On models with the system MAT+CAT It may be necessary to replace both sensors (before and after the catalyst), which will increase the cost by up to 20 000–25 000 ₽.

Why does error P1135 appear after chip tuning?

Chip tuning changes the fuel maps, and if the firmware is not optimized for your configuration (for example, a 4-2-1 spider or forward flow is installed), the ECU records false errors. Solutions:

  1. Roll back the firmware to stock and check the error.
  2. Adjust Fuel Maps in EcuFlash (dyno required).
  3. Install oxygen sensor spoof (temporary solution, not recommended for permanent driving).
How to reset error P1135 without a scanner?

On Nissan Skyline V35 reset Check Engine can be done in two ways:

  1. Disconnecting the battery:
    1. Remove the terminal "−" from the battery for 10–15 minutes.
    2. Plug it back in and start the engine (the error will reset, but will return if the problem persists).
  2. Manipulations with the gas pedal: 
    1. Включите зажигание (не заводите двигатель).

    2. Нажмите педаль газа до упора и удерживайте 10 секунд.
    

    3. Отпустите педаль, выключите зажигание.
    

    4. Повторите 2–3 раза.

    This method does not work on all versions of the ECU, but sometimes it helps to reset adaptations.

⚠️ Important: Resetting the error without eliminating the cause will lead to its reappearance!

Which oxygen sensors are best installed on the VQ35DE?

For Nissan Skyline V35 optimal options:

Manufacturer Article Pros Cons
Denso (original) 22690-AL50A Maximum precision, long service life. High price (10,000–12,000 rubles).
Bosch 0 258 006 537 Good price/quality ratio. There may be problems with calibration on stock firmware.
NGK NTK 25177 Resistant to dirt, suitable for tuned engines. Difficult to find in small towns.

Avoid Brand Sensors Febi or Meyle - they often give false testimony on VQ35DE.