Errors P0011 («Timing Over-Advanced or System Performance Bank 1") and P0021 («Timing Over-Advanced or System Performance Bank 2") are some of the most common problems in variable valve timing systems (VVT) cars Nissan. They signal that the engine control unit (ECU) detected an excessive camshaft advance angle on the first or second row of cylinders. In most cases, these codes appear on models with motors HR16DE, MR20DE, QR25DE And VQ35DE, including Qashqai, X-Trail, Juke And Note.

These errors cannot be ignored: they lead to loss of power, increased fuel consumption, unstable engine operation at idle, and even risk of damage to valves or pistons when driving for a long time with a faulty VVT. In this article we will understand why P0011 And P0021how to diagnose them correctly (including nuances for different models Nissan), and what steps to take to repair it, from simply cleaning the valve to replacing the oil pump or timing chain.

What do errors P0011 and P0021 mean on Nissan?

Codes P0011 And P0021 refer to the variable valve timing system (VVT), which adjusts the camshaft angle depending on engine speed. The error indicates that the actual camshaft advance angle exceeds the calculated (specified) ECU) by more than 10–15°. This can happen for several reasons:

  • 🔧 Dirty or faulty VVT valve (most often due to old oil or metal shavings).
  • ⚙️ Worn or stretched timing chain, which leads to inaccurate camshaft positioning.
  • 🛢️ Low oil pressure in the VVT system (problems with the pump, clogged channels, inappropriate oil viscosity).
  • 🔌 Malfunction of the camshaft position sensor (CMP) or its chains.
  • 📉 Firmware problems ECU (rare, but occurs after incorrect chip tuning).

In practice P0011 refers to the first row of cylinders (usually on the timing side), and P0021 - to the second. On motors VQ (for example, in Nissan X-Trail T31) errors can appear simultaneously, often indicating a common problem - such as low oil pressure or a stretched chain. On HR16DE (in Juke or Note) more often only one row suffers due to the design features of the VVT system.

📊 What VVT error have you encountered?
  • P0011 (cylinder bank 1)
  • P0021 (cylinder bank 2)
  • Both errors at the same time
  • Another VVT error

Reasons for P0011 and P0021: from oil to timing chain

To accurately determine the source of the problem, you need to analyze the accompanying symptoms and the vehicle's service history. Here are the key reasons, ranked by frequency of occurrence:

  1. Dirty or faulty VVT valve. The valve (solenoid) controls the supply of oil to the phase shifter clutch. If it becomes clogged with deposits or fails, the clutch cannot accurately adjust the camshaft angle. This is especially true for cars with mileage >100 thousand km, where the oil was changed less frequently than every 10 thousand km.
  2. Stretched timing chain. On motors MR20DE And QR25DE the chain can stretch to 150–200 thousand km, which leads to a phase shift. A characteristic sign is a “rattling” sound during a cold start.
  3. Low oil pressure. The VVT ​​system operates under oil pressure. If it drops (due to a worn pump, clogged filter or improper viscosity), the clutch will not operate correctly. Check the pressure with a pressure gauge - it should be at least 1.5 bar at idle.
  4. Poor quality or old oil. Oil with a high additive content or expired may form varnish deposits in the VVT ​​channels. Recommended viscosity for most Nissan — 5W-30 or 5W-40 (see manual).
  5. CMP sensor malfunction. If the camshaft position sensor produces incorrect data, ECU cannot accurately adjust phases. Check it with an oscilloscope or replace it with a known good one.

On motors VQ35DE (for example, in Nissan Teana or Murano) a combined problem is often encountered: a stretched chain + a dirty VVT valve. In this case the errors P0011/P0021 may be accompanied by code P0014 («Exhaust Camshaft Timing Over-Advanced"), which indicates a malfunction in the exhaust system.

How to check the timing chain without removing the cover?

One of the indirect signs of a stretched chain is the displacement of the marks on the camshaft pulleys relative to the marks on the cylinder block. To do this, you need to remove the valve cover and visually assess the position of the marks when aligning the crankshaft mark with TDC (top dead center) of the 1st cylinder. If the camshaft marks move forward more than 5–7°, the chain requires replacement.

Diagnosis of errors P0011 and P0021: step-by-step instructions

Diagnostics can be conveniently divided into two stages: software (using a scanner) and mechanical (component check). Let's start with the software:

Read all errors by scanner (not only P0011/P0021)

Check CMP and CKP sensor parameters in real time

Measure the oil pressure (if there is a pressure gauge)

Prepare carburetor cleaner or WD-40 to clean the VVT valve

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Step 1: Read errors and parameters

Connect a diagnostic scanner (for example, Launch X431 or Autel MaxiCOM) and check:

  • 📊 Current errors (there may be associated codes, e.g. P0340 — CMP sensor malfunction).
  • 📈 VVT parameters: camshaft advance angle (Camshaft Timing Advance) must be within ±5° of the calculated value.
  • 🛢️ Oil pressure (if the scanner supports it). Normal: 1.5–3 bar at idle, 3–5 bar at rpm.

Step 2: VVT Valve Check

The valve is located on the cylinder head (usually near the valve cover). To check it:

  1. Remove the connector from the valve and check the resistance with a multimeter. Normal: 6–12 Ohms (depending on model).
  2. Apply 12V to the valve from the battery - a click should be heard (solenoid operation).
  3. Remove the valve and wash it with carburetor cleaner. Pay attention to the filter mesh - if it is clogged, the valve must be replaced.

Step 3: Checking the timing chain

If errors appear when cold and are accompanied by noise, there is likely a problem with the circuit. For diagnostics:

  • 🔧 Remove the valve covers and check the alignment of the marks on the camshafts and crankshaft.
  • 📏 Measure the chain slack (norm: no more than 10 mm when tensioned).
  • 🔊 Listen to the engine with a stethoscope - the characteristic “rustle” of the chain indicates wear.
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If after cleaning the VVT valve the errors disappeared, but returned after 1–2 thousand km, the problem lies in the quality of the oil or clogged oil channels. Try flushing the system with a special liquid (for example, Liqui Moly Pro-Line Motorspulung).

Table: Common symptoms and their probable causes

Symptom Probable Cause Recommendations
Errors appear only on a cold engine Dirty VVT valve or thick oil Wash the valve, replace the oil with a less viscous one (for example, with 10W-40 on 5W-30)
Chain noise when starting, constant errors Stretched timing chain or worn tensioners Replacement of chain, dampers and tensioners (set)
Errors appear at high speeds (>3000 rpm) Low oil pressure or VVT clutch failure Check oil pump, replace VVT clutch
Related errors P0340 or P0345 Malfunction of the CMP sensor or its circuit Check the connector and wiring, replace the sensor
The errors disappeared after the reset, but returned after 100–200 km Contaminated oil passages or VVT valve Complete VVT system flush, oil and filter change

How to resolve errors P0011 and P0021: from simple to complex

The repair algorithm depends on the diagnosed cause. Let's start with the simplest and cheapest solutions:

1. Cleaning the VVT valve

If the valve is dirty, it can be washed without removal:

  1. Disconnect the valve connector.
  2. Pour carburetor cleaner (for example, Abro CC-220).
  3. Reconnect the connector and run the engine for 1-2 minutes to allow the cleaner to circulate in the system.
  4. Drain the oil and replace it along with the filter.

If errors remain after cleaning, the valve requires replacement (part number for Nissan Qashqai J10 with motor MR20DE: 13810-4M50A).

2. Oil change and system flushing

Use approved oil Nissan (For example, Nissan Oil 5W-30 or Mobil 1 ESP 5W-30). For washing:

  • 🛢️ Fill in flushing oil (for example, Liqui Moly Oil-Schlamm-Spulung) and let the engine idle for 10–15 minutes.
  • 🔄 Drain the wash, replace the filter and fill in new oil.
  • 🔧 After replacement, reset the errors and drive 50-100 km to adapt the VVT system.

3. Replacing the timing chain

If the chain is stretched, it must be replaced along with tensioners and dampers. For Nissan Qashqai J11 with motor MR20DD you will need a chain kit (part number: 13070-4M500). The work is labor-intensive - it requires removing the front engine cover and aligning the marks. It is recommended to entrust it to professionals.

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After replacing the timing chain, be sure to perform the valve timing “learning” procedure using a diagnostic scanner (for example, Launch X431). Without this, errors may remain!

4. Checking the CMP sensor

If the sensor is faulty, replacing it solves the problem. Article for Nissan X-Trail T32 with motor QR25DE: 23731-AL50A. Before replacing, check:

  • 🔌 Condition of the connector (oxidation, wire breaks).
  • 📊 Sensor signal using an oscilloscope (must be a clear rectangular pulse).

Repair features for different Nissan models

VVT system design and valve access vary by model and engine. Let's consider the key nuances:

Nissan Qashqai (J10, J11) with MR20DE/MR20DD engine

  • 🔧 The VVT valve is located on the right (in the direction of travel) on the block head. To gain access you need to remove the decorative cover.
  • ⚠️ A common problem is chain stretching already at 120–150 thousand km. When replacing the chain, be sure to also replace the hydraulic tensioner.
  • 🛢️ Oil viscosity: 5W-30 (tolerance Nissan or API SN).

Nissan X-Trail (T31, T32) with QR25DE engine

  • 🔧 VVT valves are located at the front (alternator belt side). The air duct will need to be removed for cleaning.
  • ⚠️ On these engines, wear of VVT couplings is common (article: 13800-4M60A). When replacing couplings, be sure to update the firmware ECU to the latest version.
  • 📊 Bugs P0011/P0021 may be accompanied P0075 (VVT solenoid malfunction).

Nissan Juke with HR16DE engine

  • 🔧 There is one VVT valve (on the intake camshaft). Access to it is difficult - you will need to remove the intake manifold.
  • ⚠️ A common problem is VVT clutch jamming due to old oil. It is recommended to flush the system every 60 thousand km.
  • 🛢️ Oil viscosity: 0W-20 or 5W-30 (according to the manual).
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On motors VQ35DE (for example, in Nissan Teana J32) VVT errors are often associated with wear of hydraulic compensators. If errors remain after replacing the valve and chain, check the compression in the cylinders.

Prevention of errors P0011 and P0021: how to avoid recurrence

To prevent errors from recurring, follow these guidelines:

  1. Regular oil changes. Use only high-quality synthetic oil with approval Nissan and change it every 7–10 thousand km (or once a year).
  2. Oil level control. The level should be between the marks MIN And MAX on the dipstick. Add oil of the same brand that was added.
  3. Flushing the VVT system. Every 50–60 thousand km, add a flushing additive to the oil (for example, Wynns VVT Cleaner).
  4. Timing chain diagnostics. Check the condition of the chain every 100 thousand km (or when noise appears).
  5. Avoid aggressive driving. Sharp acceleration and braking increase the load on the VVT system.

On engines with a mileage of more than 150 thousand km, it is recommended to replace the oil pump (part number for MR20DE: 15010-4M500) and cleaning oil channels. This will prevent pressure loss and extend the life of the VVT system.

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If you frequently drive in traffic jams or short distances, the oil ages faster. In this case, reduce the replacement interval to 5–7 thousand km!

FAQ: Frequently asked questions about errors P0011 and P0021

Is it possible to drive with errors P0011/P0021?

It’s possible for a short time (1-2 trips), but long-term driving with these errors leads to:

  • 🔥 Increased wear of valves and pistons due to incorrect valve timing.
  • 🛢️ Increased fuel consumption by 10–15%.
  • ⚠️ Risk of breaking the stretched timing chain (on engines with an interference design this leads to bent valves).

It is recommended to resolve the problem within 1-2 weeks.

How much does the repair cost?

The cost depends on the reason:

  • 🔧 VVT valve cleaning: 1,500–3,000 ₽ (on your own - free).
  • 🛢️ Oil change + flushing: 3,000–5,000 ₽.
  • 🔗 Timing chain replacement: 15,000–30,000 ₽ (including labor).
  • 📊 Replacement of the CMP sensor: 2,000–4,000 ₽.

On Nissan Qashqai with motor MR20DE a complete repair (chain + VVT valves + oil) will cost 25,000–40,000 rubles.

Is it possible to reset errors without repair?

It’s possible, but they will return in 10–100 km, since the problem remains. Resetting errors only makes sense after eliminating the cause or to check the results of the repair.

Exception: if errors appeared after changing the oil (for example, with 5W-40 on 0W-20), they may disappear after the system adapts (drive 50–100 km).

What oil should I use to avoid problems with VVT?

Recommended oils for Nissan with VVT system:

Engine model Recommended viscosity Examples of oils
HR16DE (Juke, Note) 0W-20 or 5W-30 Nissan Oil 0W-20, Idemitsu Zepro Eco Medalist 0W-20
MR20DE (Qashqai, X-Trail) 5W-30 or 5W-40 Mobil 1 ESP 5W-30, Motul 8100 X-Clean 5W-30
QR25DE (X-Trail, Teana) 5W-30 Castrol Edge 5W-30, Liqui Moly Top Tec 4200 5W-30
VQ35DE (Murano, Pathfinder) 5W-30 or 5W-40 Pennzoil Platinum 5W-30, Total Quartz 9000 5W-40

Avoid oils with high levels of additives (such as "long-release") - they can clog the VVT passages.

Can I replace the VVT valve myself?

Yes, if you have experience in car repairs. You will need:

  1. Remove the decorative engine cover and air duct.
  2. Disconnect the valve connector and unscrew it (usually 2 bolts of 10 mm).
  3. Install a new valve (before installation, lubricate the O-ring with oil).
  4. Reset errors using the scanner.

Difficulty: 3/5 (requires care when working with connectors and seals).

⚠️ Attention: When replacing the VVT valve on engines VQ35DE be sure to update the firmware ECU until the latest version - in older versions there may be phase control bugs.