Error code P1110 on cars Nissan - one of the most common problems associated with the engine management system. It indicates a fault in the circuit Intake air temperature (IAT) sensor, which is responsible for the correct operation of the fuel mixture and ignition. If your Qashqai, X-Trail or other model Nissan produces this code, it cannot be ignored: incorrect sensor readings can lead to increased fuel consumption, unstable engine operation and even damage to the catalyst.

In this article we will look at what exactly it means error P1110 on Nissan with engines HR16DE, MR20DE, QR25DE and others, how to properly diagnose it (including checking with a multimeter and scanner), and also give step-by-step repair instructions - from cleaning the sensor to replacing the wiring. We will pay special attention to the nuances for popular models, such as Juke, Note And Almera, where the problem is often disguised as other faults.

What does P1110 mean on Nissan?

Code P1110 stands for Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem - There is a problem with the range or performance of the intake air temperature sensor circuit. This sensor (often integrated into MAF sensor or absolute pressure sensor) transmits data to ECU about the temperature of the air entering the engine. Based on them, the control unit adjusts:

  • 🔥 Composition of the air-fuel mixture (rich/lean)
  • ⚡ Ignition timing
  • 🌀 Operation of the exhaust gas recirculation (EGR) system

If the sensor produces incorrect values (for example, it shows -40°C with real +20°C), the ECU goes into emergency mode, which leads to:

  • ⚠️ Floating idle speed
  • 🛢️ Increased fuel consumption by 10–15%
  • 🚗 Jerking during acceleration
  • 🔥 Lighting up the lamp Check Engine

On some models Nissan (For example, Pathfinder R51 or Navara D40) code P1110 may be accompanied by additional codes such as P0100 (MAF circuit malfunction) or P0171 (lean mixture). This complicates diagnosis as symptoms overlap.

📊 Which Nissan model did you encounter error P1110 on?
  • Qashqai J10/J11
  • X-Trail T31/T32
  • Juke F15
  • Note E12
  • Almera N18
  • Other model

Reasons for error P1110

Error P1110 on Nissan occurs for several reasons, and they can be divided into three groups: problems with the sensor itself, wiring faults and malfunctions of the ECU. Let's look at each in detail.

Reason Frequency of occurrence Symptoms
IAT sensor contamination (dust, oil, soot) 70% Floating speed, error appears periodically
Open or short circuit in wiring 15% The error is constant, misfire is possible
Malfunction of the sensor itself (failure of the thermistor) 10% The temperature readings are fixed at the same level (for example, -40°C)
Problems with the connector (oxidation, poor contact) 3% The error appears after rain or washing
ECU firmware failure 2% Multiple errors, unstable engine operation

The most common reason is sensor contamination. On engines HR16DE And MR20DE (installed in Qashqai, X-Trail, Juke) The IAT sensor is often located near the air filter. If the filter has not been changed for a long time or there is oil leakage through the crankcase ventilation, a film forms on the sensor, distorting the readings. In 30% of cases, it is enough to clean the sensor for the error to disappear.

A less obvious but dangerous reason is wiring damage. On Nissan Note E12 And Almera N18 The wiring harness to the IAT sensor runs near the exhaust manifold. Over time, the insulation melts, causing a short circuit. This can only be diagnosed visually or using a multimeter.

⚠️ Attention: If P1110 appears along with P0300 (misfire), do not rush to change the sensor. First, check the integrity of the high-voltage wires and ignition coils - on Nissan with engines QR25DE this is a “couple” of errors.

How to Diagnose Error P1110: Step-by-Step Instructions

Diagnosing error P1110 requires a systematic approach. Start by reading the codes with a scan tool, then check the sensor and wiring. Below are detailed instructions taking into account the features Nissan.

1. Reading errors with a scanner

Use a diagnostic scanner (eg Launch X431 or ELM327) to read codes. Please note:

  • 📊 Current IAT sensor readings (must correspond to actual air temperature).
  • 🔄 Presence of additional errors (for example, P0100 or P0171).
  • 📈 Temperature change graph (real time).

If the temperature is fixed at one level (for example, -40°C or +140°C), the sensor is faulty. If the readings change smoothly, but do not correspond to reality, the problem is contamination or wiring.

2. Visual inspection of the sensor and wiring

On most models Nissan IAT sensor is located:

  • In the air filter housing (for example, Qashqai J11).
  • On the intake manifold (for example, X-Trail T32).
  • As part of the MAF sensor (for example, Juke F15).

Disconnect the connector and inspect:

  • 🔍 Sensor: presence of oil deposits, soot or mechanical damage.
  • 🔌 Connector: oxidation of contacts, tightness of fit.
  • 🔧 Wiring: insulation melting, breaks.

Disconnect the negative terminal of the battery

Remove the air filter (if necessary)

Disconnect the sensor connector

Inspect the sensor for contamination

Prepare a multimeter for testing -->

3. Checking the sensor with a multimeter

To test the IAT sensor:

  1. Set the multimeter to resistance measurement mode (ohmmeter).
  2. Connect the probes to the sensor contacts (usually pins 1 and 2 on the connector).
  3. Compare the readings with the table:
Air temperature (°C) Sensor resistance (kOhm)
-20 14–16
0 5–7
20 2–3
40 1–1.5

If the resistance does not change when heated (for example, bring the sensor to a hair dryer) or shows an open circuit (OL) — the sensor must be replaced. On Nissan the original IAT sensor has an article number 22680-4M000 (for most models), but analogues from Bosch or Denso.

⚠️ Attention: On engines VQ35DE (For example, Nissan Teana J32) The IAT sensor is integrated into the MAF sensor. Replacing just the sensor is not possible - you will have to change the entire assembly (article number 22680-AL50A).

How to Fix Error P1110: From Cleaning to Replacement

The repair method depends on the cause of the problem. Below are step-by-step actions for each case.

1. Cleaning the IAT sensor

If the sensor is dirty, it can be cleaned without dismantling:

  1. Remove the air filter and provide access to the sensor.
  2. Use MAF sensor cleaner (For example, CRC MAF Sensor Cleaner).
  3. Apply the product to the sensitive element (without touching it!) and let dry for 10 minutes.
  4. Blow out the sensor with compressed air (no pressure!).

On Nissan Qashqai J10 And X-Trail T31 The sensor often becomes dirty due to a faulty crankcase ventilation valve. If after cleaning the error returns after 1-2 weeks, check the ventilation system.

💡

Do not use alcohol, gasoline or WD-40 to clean the IAT sensor as they will damage the sensor. Only specialized cleaners!

2. Replacing the IAT sensor

If the sensor is faulty, it must be replaced. The process depends on the model:

  • 🔧 On Nissan Juke F15 The sensor is built into the MAF sensor - the entire assembly needs to be replaced.
  • 🔧 On Qashqai J11 And X-Trail T32 The sensor is separate - unscrew 1 bolt and disconnect the connector.
  • 🔧 On Almera N18 The sensor is attached to the air filter housing - just remove the clamp.

After replacement, reset the errors using the scanner. If the P1110 code appears again, there is a problem in the wiring or the ECU.

3. Wiring repair

To check the wiring:

  1. Disconnect the sensor and ECU connector.
  2. Test the circuit with a multimeter (test mode). The resistance should be close to 0 ohm.
  3. Check the circuit for short circuit (between contacts and ground).

If a break or short circuit is detected, restore the wiring by soldering or replacing the harness. On Nissan Note E12 The wires and sensors often get chafed; they can be protected with heat-shrinkable tubing.

What should I do if the error remains after replacing the sensor?

If the sensor is new, but the P1110 error does not go away, check:

1. **ECU firmware** - on some Nissan (For example, Tiida C11) software update required.

2. **Sensor power supply** - the voltage at the connector should be 5 V (checked with a multimeter between pins 1 and 3).

3. **ECU condition** - if the unit is “buggy”, it may require flashing or replacement.

Error P1110 on popular Nissan models: nuances

Despite the common causes, error P1110 on different models Nissan manifests itself in different ways. Let's look at the features for the most common cars.

Nissan Qashqai J10/J11 (HR16DE, MR20DE engines)

On Qashqai The IAT sensor often fails due to moisture getting into the connector. Symptoms:

  • The error appears after washing or rain.
  • The engine stalls when cold.
  • Fuel consumption increases to 12–14 l/100 km.

Solution: cleaning the connector contacts and processing WD-40 Contact Cleaner. If the problem persists, replace the connector or sensor.

Nissan X-Trail T31/T32 (QR25DE, MR20DD engines)

On X-Trail with engine QR25DE error P1110 is often accompanied by P0171 (lean mixture). The reason is air leakage through a cracked pipe between the MAF sensor and the throttle valve. Check the tightness of the intake system!

Nissan Juke F15 (HR16DE engine)

On Juke The IAT sensor is integrated into the MAF sensor (part no. 22680-4M01A). If P1110 appears along with P0100Most likely the entire assembly is faulty. Replacement will cost 8–12 thousand rubles (original).

Nissan Almera N18 (HR16DE engine)

On Almera The P1110 code may be due to a faulty canister valve. Check the valve circuit (connector and tank) - if it is jammed, the ECU receives incorrect data on the air temperature.

💡

On Nissan with HR16DE and MR20DE engines, error P1110 in 60% of cases is caused by contamination of the sensor or air leaks. Start your diagnosis with these points!

Common repair mistakes and how to avoid them

Many owners Nissan make mistakes when troubleshooting P1110, which leads to the reappearance of the problem. Here are the most common mistakes:

  1. Ignore additional errors. If they light up together with P1110 P0171 or P0300, eliminate them first - they may be the root cause.
  2. Use of non-original sensors. Cheap analogues (for example, from NoName) often give incorrect readings. Optimal choice - Denso or Hitachi.
  3. Failure to check wiring. On Nissan Pathfinder R51 The wires to the IAT sensor often rub against the bracket - this leads to a short circuit.
  4. Resetting errors without eliminating the cause. If you simply erase P1110 with a scanner, it will return in 10–50 km.

Another common mistake is incorrect sensor installation. For example, on Nissan Teana J32 The IAT sensor must be oriented with its sensing element in the direction of air flow. If the sides are mixed up, the readings will be incorrect.

⚠️ Attention: On engines VQ35DE (For example, Nissan Murano Z51) after replacing the MAF sensor (which has an IAT built into it), the throttle body must be adapted! Without this, the engine will run unstably.

FAQ: Frequently asked questions about error P1110 on Nissan

Is it possible to drive with error code P1110?

Short term - yes, but not recommended. Driving for a long time with a faulty IAT sensor will result in:

  • Increased fuel consumption (up to +15%).
  • Engine overheating due to incorrect mixture composition.
  • Damage to the catalyst (on models with Euro 5/6).

If the error appears for the first time, you can drive to the service station, but no more than 200–300 km.

How much does it cost to replace an IAT sensor on a Nissan?

The cost depends on the model:

  • Separate IAT sensor (for example, for Qashqai): 1,500–3,000 rub.
  • MAF sensor with built-in IAT (for example, for Juke): 8,000–15,000 rub.
  • Replacement work: 1,000–2,500 rub. (depending on the complexity of access).

On Nissan Patrol Y62 with engine VK56VD The IAT sensor is built into the throttle valve block - replacement will cost 20,000–30,000 rubles.

Could P1110 be caused by bad fuel?

No, directly - no. However, low-quality fuel can cause:

  • Contamination of the IAT sensor with soot (during detonation).
  • Damage to the catalyst, which indirectly affects the operation of the intake system.

If the error appears after refueling, first check the spark plugs and ignition coils - they are more likely to suffer from bad gasoline.

How to reset error P1110 without a scanner?

On most Nissan You can reset the errors by disconnecting the battery:

  1. Remove the negative terminal for 10–15 minutes.
  2. Plug it back in.
  3. Start the engine and let it idle for 5 minutes.

However, this method will reset all errors, including historical ones. If the cause is not corrected, P1110 will return.

Where is the IAT sensor located on my Nissan?

Location varies by model and engine:

Model Engine IAT sensor location
Qashqai J11 HR16DE, MR20DD In the air filter housing
X-Trail T32 QR25DE At the intake manifold近and throttle valve
Juke F15 HR16DE As part of the MAF sensor
Almera N18 HR16DE On the air filter housing
Pathfinder R52 VQ40DE In the throttle body

For exact location, check the diagram in your model's repair manual.