Fault code P1277 on cars Nissan - one of the most common problems associated with the engine management system. This error may appear on models from Qashqai And X-Trail to Juke And Navara, regardless of year of manufacture. Owners often encounter it after refueling with low-quality fuel, electronic failures or mechanical problems. But what exactly is hidden behind this code and how to properly eliminate it?

Unlike many other errors, P1277 does not always indicate a serious breakdown. In some cases, you can reset it yourself, but sometimes in-depth diagnostics using a scanner are required ELM327 or professional equipment. In this article we will analyze all possible causes, symptoms and solutions - from simple to complex, taking into account the experience of auto electricians and official service manuals Nissan.

What does error P1277 mean on Nissan?

Code P1277 stands for "Injector Control Circuit Low" (Injector Circuit Low). This means that the engine control unit (ECU) detects an abnormally low voltage in the circuit of one or more fuel injectors. The error belongs to the category common OBD-II codes, but on Nissan may have specific nuances depending on the model and type of engine.

It is important to understand that P1277 - this is not a sentence. In 30% of cases, it occurs due to temporary failures, for example, due to poor contact of connectors or power surges in the on-board network. However, if the error appears regularly, this may indicate:

  • 🔌 Faulty wiring or injector connectors
  • 🛢️ Contamination or failure of the injectors themselves
  • 🔋 Problems with the control unit (ECU)
  • ⚡ Power system failures (for example, low battery voltage)

On some models Nissan (For example, Qashqai J10 with engine MR20DE) error P1277 often accompanied P0300 (misfire). This is due to the fact that ECU switches off a faulty injector to prevent damage to the catalyst.

⚠️ Attention: If the error P1277 appears along with P0300, P0301-P0304 (cylinder misfires), it is not recommended to operate the vehicle. Driving for a long time in this mode can lead to overheating of the catalyst and its destruction.

Reasons for error P1277

To effectively eliminate P1277, you need to understand its root cause. Below we have listed all possible scenarios, from the simplest to the most complex, taking into account the features Nissan.

1. Problems with the electrical circuit

The most common cause is a broken contact or break in the injector circuit. It could be:

  • 🔌 Oxidation or corrosion of contacts in the injector connector
  • 🔧 Damage to wiring (frayed wires, short circuit)
  • 🔋 Injection system fuse or relay malfunction

2. Injector malfunction

The injectors themselves wear out or become dirty over time. On Nissan with mileage over 150,000 km are often found:

  • 🛢️ Clogged injector nozzle (especially when using low-quality fuel)
  • 🔥 Needle jamming due to carbon deposits
  • 💧 Fuel leakage through O-rings

3. Problems with the control unit (ECU)

Less common, but malfunctions occur ECU, for example:

  • 🖥️ Damage to the internal circuits of the unit
  • 🔄 Firmware errors (relevant after chip tuning)
  • 🔋 Unstable power supply ECU (for example due to a low battery)

On models Nissan with the system Direct Injection (For example, X-Trail T32 with engine MR20DD) error P1277 may appear due to firmware incompatibility ECU with hardware. This often happens after unqualified chip tuning.

📊 On which Nissan model did you encounter error P1277?
  • Qashqai
  • X-Trail
  • Juke
  • Navara
  • Other model

Symptoms of error P1277

Error P1277 rarely manifests itself - it is usually accompanied by noticeable changes in the behavior of the car. Here are the main signs to look out for:

Symptom Probable Cause Danger level
Floating idle speed Unstable operation of one or more injectors Average
Jerks during acceleration Misfire due to disabled injector High
Lights up Check Engine Error active P1277 in memory ECU Low (but requires diagnostics)
Increased fuel consumption ECU compensates for the malfunction by enriching the mixture Average
Engine tripping Cylinder shutdown due to faulty injector High

On Nissan Qashqai J11 And X-Trail T31 with engines MR20DE And QR25DE error P1277 often accompanied jerking when driving at low speeds. This is due to the fact that ECU tries to adapt to the unstable operation of the injectors, but not always successfully.

⚠️ Attention: If together with P1277 indicator lights up on the dashboard ESP/OFF or Slip, this may indicate problems with the crankshaft or camshaft position sensors. In this case, a comprehensive diagnosis is required.

Diagnosing error P1277: step-by-step instructions

To pinpoint the cause P1277, you need to carry out diagnostics in several stages. Below we have provided step-by-step instructions that are suitable for most models. Nissan (from Micra to Patrol).

1. Reading errors with a scanner

The first step is to connect a diagnostic scanner (for example, ELM327, Launch X431 or Autel) and count all active errors. Please note:

  • 🔍 If in addition P1277 There is P0200-P0204 (faulty injector circuit), the problem is most likely in the wiring.
  • 🔍 If there is P0300-P0304 (misfire), the injector or spark plug is at fault.
  • 🔍 If the error appears only on a hot engine, check the heat resistance of the connectors.

2. Checking connectors and wiring

Disconnect the injector connector (on Nissan it is usually black or gray) and inspect it for:

  • 🔌 Oxidation or green plaque (a sign of corrosion)
  • 🔧 Damaged or melted contacts
  • 💧 Traces of moisture (may indicate a leak or condensation)

To check the integrity of the wiring, use a multimeter in continuity mode. Measure the resistance between the injector connector contacts and ECU (the diagram can be found in the manual for a specific model). Normal circuit resistance is usually 0.5–2 Ohm.

Inspect the connectors for corrosion|Test the circuit with a multimeter|Check the voltage at the connector (should be 12V with the ignition on)|Make sure there is no short circuit to ground-->

3. Checking the injectors

If the wiring is ok, the next step is to test the injectors. You can do this in two ways:

  1. Resistance test: Disconnect the injector connector and measure the resistance between its contacts. For most Nissan normal value - 11–15 Ohm (for engines HR16DE, MR20DE). If the resistance is lower 10 ohm or tends to zero, the injector is faulty.
  2. Testing at the stand: The most accurate method is to remove the injectors and test them on a bench (for example, in a service center). This will help identify clogged nozzles or leaks.

On Nissan Juke with engine HR16DE a common problem with injectors Bosch (article 0 280 158 968), which over time begin to “leak” due to wear of the seals. In this case, they need to be replaced as a set.

4. Checking the control unit (ECU)

If all previous tests did not reveal problems, it remains ECU. Check:

  • 🔋 Voltage on the block (must be stable 12–14.5V)
  • 🖥️ Presence of errors in the firmware (relevant after chip tuning)
  • 🔌 Condition of connectors ECU (oxidation, moisture)

On Nissan Qashqai J10 And X-Trail T31 with blocks ECU Hitachi sometimes resetting adaptations through the diagnostic scanner helps (function Injector Coding or Throttle Reset).

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If after resetting the error P1277 it appears again after 50–100 km, the problem is most likely in the mechanical part of the injector (wear, blockage). In this case, ultrasonic cleaning rarely helps - replacement is necessary.

How to fix error P1277: repair methods

Remedy P1277 depends on the cause of its occurrence. Below we have looked at all possible scenarios - from simple to complex.

1. Reset error and check contacts

If the error appears for the first time, try:

  • 🔄 Reset it through the scanner or by disconnecting the battery for 10 minutes.
  • 🔌 Check and clean the contacts of the injector connectors (use WD-40 or Contact Cleaner).
  • 🔋 Check the battery voltage (must be at least 12.6V).

On Nissan Almera N16 And Primera P12 error P1277 sometimes occurs due to poor engine ground contact. Check the fastening of the negative wire to the body or head of the unit.

2. Repair or replacement of wiring

If diagnostics reveals a break or short circuit, you need to:

  • 🔧 Restore the damaged section of the wire (soldering + heat shrink).
  • 🔌 Replace the injector connector (if the contacts are melted or corroded).
  • 🛠️ Lay a new wiring harness (as a last resort).

On Nissan X-Trail T32 with engine MR20DD The wiring near the collector often frays due to vibrations. In this case, it is recommended to use corrugation to protect the harness.

3. Cleaning or replacing injectors

If the injectors are clogged or worn:

  • 🛢️ Try cleaning with a special liquid (for example, Wynn's or Liqui Moly).
  • 🔊 Carry out ultrasonic cleaning (effective for light contamination).
  • 🔧 Replace the injectors with new ones (if the resistance is below normal or there is mechanical damage).

For Nissan Qashqai J11 with engine MR20DE injectors fit Denso (article 16600-4M000) or Bosch (article 0 280 158 968). When replacing, it is recommended to replace all 4 injectors as a set to avoid imbalance in the operation of the cylinders.

4. ECU diagnostics and repair

If the problem is in the control unit:

  • 🖥️ Reflash ECU (relevant after unsuccessful chip tuning).
  • 🔧 Replace the unit with a new or used one (with subsequent binding to the immobilizer).
  • 🛠️ Repair ECU in a specialized service (for example, restoration of tracks or replacement of capacitors).

On Nissan Teana J32 And Maxima A35 with blocks ECU Hitachi sometimes replacing the capacitors on the board helps (a common problem after 200,000 km).

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If after replacing injectors or repairing wiring there is an error P1277 remains, be sure to check the firmware ECU. On some Nissan it is required to “train” new injectors through a diagnostic scanner (function Injector Coding).

Prevention of error P1277

To minimize the risk of P1277, follow these guidelines:

  • 🛢️ Refuel at proven gas stations (fuel quality directly affects the life of the injectors).
  • 🔧 Clean the injectors regularly (every 30,000 km) with special additives.
  • 🔋 Monitor the condition of the battery and generator (voltage surges are harmful ECU).
  • 🔌 Periodically check the connector contacts for oxidation (especially in wet weather).
  • 🛠️ At the first signs of unstable engine operation (jerking, tripling), carry out diagnostics.

On Nissan Juke And Qashqai with turbo engines (MR16DDT, M9R) it is especially important to use fuel with an octane rating of at least 95. Application 92 gasoline accelerates clogging of injectors and can lead to an error P1277 already after 20,000 km.

What happens if you ignore error P1277?

If you drive for a long time with an error P1277, this can lead to:

  • 🔥 Overheating and destruction of the catalyst (replacement cost from 30,000 ₽).
  • 🛢️ Increased fuel consumption (up to 20–30%).
  • 🔧 Wear of the piston group due to detonation in the cylinders.
  • 🖥️ Complete failure ECU (repairs will cost 15,000–50,000 rubles).

On Nissan with timing chain drive (for example, X-Trail T32) Ignoring a misfire can also speed up chain stretch.

Frequently asked questions about error P1277 on Nissan

Is it possible to drive with error P1277?

Short term - yes, but not recommended. If the error is accompanied by shaking or jerking, prolonged driving may damage the catalyst. On Nissan with turbo engines (MR20DD, M9R) the risk is even higher due to increased loads.

How much does the repair cost?

The cost depends on the reason:

  • 🔧 Cleaning injectors: 3,000–8,000 ₽.
  • 🔧 Replacement of one nozzle: 5,000–15,000 ₽ (depending on the model).
  • 🔧 Wiring repair: 2,000–5,000 ₽.
  • 🖥️ Flashing ECU: 5 000–20 000 ₽.

On Nissan Patrol And Navara with diesel engines (YD25DDTi) replacing injectors will cost more - up to 30,000 ₽ per set.

Is it possible to reset error P1277 without a scanner?

Yes, by disconnecting the battery for 10-15 minutes. However, if the cause is not eliminated, the error will return. On Nissan with the system Stop/Start (For example, Qashqai J11) After disconnecting the battery, the throttle may need to be relearned.

Which injectors are best to replace?

It is recommended to use original spare parts or analogues from Denso/Bosch:

  • For Qashqai J10/J11 (MR20DE): 16600-4M000 (Denso) or 0 280 158 968 (Bosch).
  • For X-Trail T31/T32 (QR25DE): 16600-3M000.
  • For Juke (HR16DE): 16600-9J000.
On diesel Nissan (For example, Navara D40 with YD25DDTi) it is strictly not recommended to install non-original injectors - this can lead to failure of the fuel injection pump.

Why does error P1277 appear after washing the engine?

Most likely, water got into the injector connectors or ECU. On Nissan with poor sealing of connectors (for example, Almera N16) this is a common problem. Solution:

  1. Dry the connectors with a hairdryer or compressed air.
  2. Process contacts WD-40 or CRC 2-26.
  3. If the error reappears, replace the connectors.