Error code P1800 on Nissan Murano Z51 (2015–2021) is one of the most common problems faced by owners of this crossover. It indicates a malfunction in the system VAET (Variable Valve Event & Timing) - a mechanism for changing valve timing, which directly affects engine power, fuel consumption and smoothness. Unlike errors on oxygen sensors or catalyst, P1800 often occurs due to wear and tear on mechanical components rather than electronic failures, which makes its elimination more labor-intensive.

Owners Murano Z51 with motor VQ35DD (3.5 l) encounter this error most often after 100–150 thousand kilometers. Symptoms can vary: from a slight “tweak” at idle to a complete loss of dynamics during acceleration. In some cases, the error appears sporadically and is reset after restarting the engine, but it cannot be ignored - this is a direct path to expensive repairs. In this article we will look at all possible causes of P1800, from simple valve contamination VVEL before the timing chain wears out, and we will also give step-by-step instructions for diagnosis and repair.

What does error P1800 mean on Nissan Murano Z51?

Code P1800 stands for «Intake Valve Timing Control Performance Bank 1» - a problem with the performance of the valve timing control system on the intake camshaft of the first row of cylinders. In the engine VQ35DD the system is responsible for this VAET (or VVEL in newer versions), which adjusts the valve lift height and opening angle depending on the engine load.

Feature Murano Z51 is that a combined system is used here: traditional VTC (phase change) + VVEL (change in valve lift height). Error P1800 indicates a failure in the part VTC, but may indirectly be related to VVEL. For example, if the valve VVEL jammed, control unit (ECU) may incorrectly interpret the signals from the camshaft sensors, which will lead to the appearance of this code.

  • 🔧 Main components involved in the error:
  • 🔹Camshaft position sensors (CMP)
  • 🔹 Phase control solenoid (VTC solenoid)
  • 🔹 Timing chain and tensioners
  • 🔹 Valve VVEL and its drive
  • 🔹 Oil and oil channels in the cylinder head

It is important to understand that P1800 - this is not a “critical” error in which the engine will stall immediately. However, ignoring it leads to:

  • ⚠️ Increased fuel consumption by 10–15%
  • ⚠️ Loss of power (especially at low and medium speeds)
  • ⚠️ Accelerated wear of the timing chain and camshafts
  • ⚠️ Risk of errors P0011, P0021 (adjacent codes by phase)
📊 How often do you check for errors on your Nissan?
  • Every month
  • Once every six months
  • Only when symptoms appear
  • Never checked

Causes of error P1800: from simple to complex

Specifics Nissan Murano Z51 is that P1800 can be caused by either a trifle (dirty solenoid) or a serious breakdown (worn timing chain). Below we have arranged the reasons by frequency of occurrence - from the most likely to the rare.

1. VTC solenoid or VVEL valve dirty

The most common reason is deposits in the phase control solenoid or valve VVEL. Over time, the oil oxidizes, forming varnish deposits that block the normal operation of these components. This is especially true for cars where the oil was changed less frequently than every 10 thousand km, or low-quality oil was used.

Symptoms:

  • 🔸 The error appears on a cold engine and disappears after warming up
  • 🔸 Rough idle
  • 🔸 “Dips” when accelerating to 2000–2500 rpm

2. Worn or stretched timing chain

Engine VQ35DD equipped with a timing chain drive, which is designed for the entire service life of the engine. However, in practice, after 150–200 thousand km, the chain may stretch, and the tensioners may lose efficiency. This leads to phase mismatch between the crankshaft and camshafts, which is fixed as P1800.

The danger is that a stretched chain can jump 1-2 teeth, which will cause errors P0016 or P0018, and in the worst case, a collision of valves with pistons.

3. Malfunction of CMP sensors (camshaft position)

Sensors CMP (Camshaft Position Sensor) transmit data on the position of the camshafts to ECU. If the sensor fails or its signal becomes unstable (due to contact oxidation or mechanical damage), the control unit cannot adjust the phases correctly, which leads to P1800.

4. Problems with the oil or oil system

System VAET/VVEL operates under oil pressure. If:

  • 🛢️ The oil is old or of poor quality (does not meet specifications API SN/ILSAC GF-5)
  • 🛢️ Oil level below minimum
  • 🛢️ The oil filter or channels in the cylinder head are clogged

- then the pressure may not be enough for the solenoids to operate normally, which provokes an error.

5. Mechanical wear of camshafts or VVEL pushers

Rarely, but there are cases when the mechanics of the system itself VVEL wears out: camshaft cams wear out, pushers or springs break. This is true for engines with mileage over 250 thousand km and requires major repairs.

What happens if you ignore P1800 for a long time?

If the cause of the P1800 error is not addressed, over time it will lead to:

1. **Loss of compression** in the cylinders due to improper closing of the valves.

2. **Damage to the catalyst** (due to suboptimal fuel combustion).

3. **Breakage of the timing chain** (if the reason is its stretching).

4. **Scuffing on the cylinder walls** (due to oil getting into the combustion chamber with a faulty VVEL).

In the worst case, **overhaul of the engine** will cost 300–500 thousand rubles.

How to Diagnose Error P1800: Step-by-Step Instructions

Before you rush to change the solenoids or timing chain, you must pinpoint the cause. Below is a diagnostic algorithm that will help narrow down the range of problems.

Step 1: Read all errors by the scanner

Error P1800 rarely appears alone. Usually they go with it:

  • 🔧 P0011 — «A» Camshaft Position Timing Over-Advanced (Bank 1)
  • 🔧 P0021 — «A» Camshaft Position Timing Over-Advanced (Bank 2)
  • 🔧 P0340 — Malfunction of the camshaft position sensor
  • 🔧 P0300 — Numerous misfires

If together with P1800 There is P0011/P0021, the problem is most likely in VTC solenoids or timing chains. If only P1800 - check VVEL valve and sensors CMP.

Step 2: Check oil level and condition

Open the oil filler cap and check:

  • 🔹 Oil level (should be between MIN And MAX)
  • 🔹 Color and consistency (black, thick or with metal shavings are a sign of problems)
  • 🔹 The presence of an emulsion (indicates the presence of antifreeze)

If the oil is old (mileage >10 thousand km), replace it and the filter before further diagnostics.

Step 3: Listen to the engine

Start the car and listen:

  • 🔊 Knocking or clanging when starting, the timing chain or tensioners may wear out.
  • 🔊 Noisy VVEL valve (clicks from the side of the block head) is a sign of its malfunction.
  • 🔊 Rough idle - may indicate problems with sensors CMP.

Step 4: Test VTC solenoids with a multimeter

The solenoids are located on the cylinder head (intake manifold side). To check them:

  1. Remove the connector from the solenoid.
  2. Measure the resistance between the contacts: normal - 6–12 Ohm.
  3. If the resistance is outside the norm or there is a break, the solenoid must be replaced.

Read all errors with a scanner (not only P1800)|Check the oil level and condition|Listen to the engine for extraneous noise|Measure the resistance of the VTC solenoids|Check the timing chain for tension (if suspected)

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Step 5: Visual Inspection of the Timing Chain

If you suspect a chain, you will have to remove the valve cover. Please note:

  • 🔗 Chain slack (normal - tensioned without sagging)
  • 🔗 Tensioner condition (should not be in a “collapsed” state)
  • 🔗 Link wear (sharp or cracked links are a sign of critical wear)

If the chain is stretched, it definitely needs to be replaced together with tensioners and dampers. On Murano Z51 This is a labor-intensive procedure (removing the front part of the engine is required), but it cannot be ignored.

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If, when inspecting the timing chain, you find metal shavings in the oil under the valve cover, this is a sign of wear on the camshafts or tappets. In this case, you will need to disassemble the block head and replace damaged parts.

How to Fix Error P1800: Solutions for Different Causes

Depending on the diagnosis, repair methods will vary. Below - step by step instructions for each of the reasons.

1. Cleaning VTC solenoids and VVEL valve

If the problem is deposits, you can try cleaning the solenoids and valve VVEL without replacement. For this you will need:

  • 🧴 Carburetor cleaner or special cleaner VVEL (For example, Liqui Moly Pro-Line Drosselklappen-Reiniger)
  • 🔧 Socket wrench set
  • 🔧 New o-rings for solenoids

Procedure:

  1. Remove the intake manifold (at Murano Z51 this requires dismantling the throttle valve and pipes).
  2. Disconnect the solenoid connectors VTC and remove them (2 bolts each).
  3. Wash the solenoids with cleaner, paying special attention to the oil passages.
  4. Remove the valve VVEL (located under the intake manifold) and clean it of carbon deposits.
  5. Install new O-rings and reassemble everything in reverse order.

After cleaning be sure to clear errors scanner and drive 50–100 km to evaluate the result. If the error returns, the problem is deeper (for example, wear of the mechanics VVEL).

2. Replacing VTC solenoids

If cleaning does not help or the solenoids “do not ring” with a multimeter, they need to be replaced. Original solenoids for Murano Z51 have articles:

  • 13810-4M50A - Intake camshaft solenoid (left)
  • 13810-4M50B - Exhaust camshaft solenoid (right)

The cost of original parts is about 5-7 thousand rubles per piece. Analogs (for example, Hitachi or Ajusa) will cost 2–3 thousand rubles.

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When replacing VTC solenoids, always replace the O-rings and check the condition of the oil passages in the cylinder head. If the channels are clogged, nueva cleaning will not have a long-term effect.

3. Replacing the timing chain and tensioners

If the chain is stretched, it is better to entrust its replacement to professionals, since the procedure requires:

  • 🔧 Removing the front engine cover
  • 🔧 Fixing camshafts and crankshaft at TDC
  • 🔧 Replacement of all tensioners, dampers and seals

Timing chain kit for Murano Z51 (article 13028-4M505) costs about 15–20 thousand rubles. Work in the service will cost 25–40 thousand rubles, depending on the region.

4. Replacing CMP sensors

Camshaft position sensors (CMP) on Murano Z51 located on the cylinder head (one for each camshaft). Their articles:

  • 23731-4M50A — intake camshaft sensor
  • 23731-4M50B — exhaust camshaft sensor

The cost of original sensors is 3–4 thousand rubles per piece. Before replacing, check the power supply circuit of the sensors (there should be 12V at the connector when the ignition is on).

5. Repair or replacement of the VVEL valve

If the problem is mechanical VVEL, the cylinder head will need to be disassembled. In most cases it helps:

  • 🔧 Replacement of worn pushers or springs
  • 🔧 Grinding camshafts (if there are scuffs)
  • 🔧 Valve replacement VVEL assembled (item no. 13850-4M50A, price ~20 thousand rubles)

This type of repair is only advisable for mileage up to 200 thousand km. If the engine is “tired”, it may be cheaper to find a contract engine.

💡

When replacing the VVEL valve, always check the condition of the oil pump. If it is worn out and does not create enough pressure, the new part will quickly fail.

Repair cost: comparison of options

Elimination price P1800 on Nissan Murano Z51 varies from 2 thousand rubles (cleaning solenoids) to 100+ thousand rubles (overhaul of the engine). Below are estimated prices for work and spare parts.

Type of repair Cost of spare parts (₽) Cost of work (₽) Total price (₽)
Cleaning VTC solenoids and VVEL valve 500–1500 (cleaner + rings) 3000–5000 3500–6500
Replacement of VTC solenoids (2 pcs.) 10000–14000 (original) 2000–4000 12000–18000
Replacing timing chain + tensioners 15000–20000 (set) 25000–40000 40000–60000
Replacement of CMP sensors (2 pcs.) 6000–8000 (original) 1500–2500 7500–10500
VVEL valve repair (replacement of pushers) 5000–15000 15000–25000 20000–40000

If the car's mileage exceeds 200 thousand km, before major repairs (for example, replacing the timing chain), it makes sense to assess the general condition of the engine. It might be better to look contract motor (price ~150–200 thousand rubles) or sell the car “as is”.

💡

When choosing between repairing and selling a car with a P1800, keep in mind that after replacing the timing chain or repairing the VVEL, the engine will last another 100–150 thousand km with proper maintenance.

Prevention of error P1800: how to avoid recurrence

Even after successful repair P1800 may return if you do not follow simple operating rules. Here's what the experts recommend:

  • 🛢️ Oil and filter: Change the oil every 8–10 thousand km, using only the original (Nissan 5W-30, article KE900-90042) or analogues with approval API SN/ILSAC GF-5.
  • 🔧 Sensors and solenoids: Every 50 thousand km, remove and clean the solenoids VTC (even if there are no errors).
  • 🔊 Listening to the engine: Once a month, when cold, listen to the engine running - extraneous sounds (knocking, clanging) may indicate incipient problems with the engine. VVEL or timing chain.
  • 📊 Diagnostics: Every 20 thousand km, read the errors with a scanner (even if the “check engine” is not on). Early detection P1800 will save thousands of rubles on repairs.

Pay special attention fuel quality. Bad gasoline leads to the formation of carbon deposits on the valves and in the system VVEL, which accelerates wear. Refuel only at proven gas stations (for example, Gazpromneft, Lukoil, Rosneft) and periodically use additives to clean the intake tract (for example, Liqui Moly Ventil Sauber).

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If you frequently drive short distances (5–10 km), the engine does not have time to warm up to operating temperature, which accelerates the formation of deposits in the VVEL system. Once a week, let the engine idle for 10–15 minutes (2000–2500 rpm) to “burn through” the carbon deposits.

Frequently asked questions about error P1800 on Nissan Murano Z51

Is it possible to drive with error P1800?

Short term - yes, but not recommended for long term. Error P1800 leads to improper operation of the gas distribution system, which increases fuel consumption and engine wear. If you ignore it for more than a month, the risk of serious damage (for example, a broken timing chain) increases significantly.

Why does error P1800 only appear when it is cold?

This is a typical sign dirty VTC solenoids or timing chain wear. On a cold engine, the oil is more viscous, and if the solenoids or passages are clogged with deposits, the system cannot quickly adjust the phases. After warming up, the oil liquefies and the error disappears. The solution is to clean the solenoids or replace the circuit.

How much does a P1800 diagnostic service cost?

The cost of diagnostics depends on the depth of the test:

  • 🔧 Basic (reading errors + checking solenoids) - 1500–3000 ₽.
  • 🔧 Extended (includes removing the valve cover and inspecting the timing chain) - 5000–8000 ₽.

Some services offer free diagnostics if you agree to have them repaired.

Is it possible to reset the P1800 error without repair?

Technically yes - with a scanner or disconnecting the battery terminal for 10 minutes. However, if the cause is not eliminated, the error will return after 50–200 km. A reset without repair only makes sense to check whether the error was “false” (for example, due to a temporary sensor failure).

What oil is best to fill in to avoid P1800?

For Nissan Murano Z51 with engine VQ35DD optimal options:

  • 🛢️ Original: Nissan 5W-30 (article KE900-90042)
  • 🛢️ Analogues: Mobil 1 ESP 5W-30, Liqui Moly Top Tec 4200 5W-30, Motul 8100 X-Clean 5W-30

The main thing is that the oil meets the specification API SN/ILSAC GF-5 and had clearance Nissan.