Error code 00da on <em>Nissan Primera P12</em>: complete troubleshooting guide

Error code 00da on Nissan Primera P12 (body P12, 2002–2008) is one of the most common problems faced by owners of this model. It is associated with malfunctions in the engine management system (ECU) and often appears as false triggering of sensors or failure in the power supply circuit of the unit. Unlike typical errors on oxygen or air flow sensors, 00da requires an integrated approach: from checking the wiring to flashing the ECU.

In this article we will analyze in detail what the error means, how to diagnose it correctly (including nuances for Primera with engines QR20DE And QR25DE), and provide step-by-step troubleshooting instructions. We will pay special attention typical mistakes of car owners, which only aggravate the problem, as well as alternative repair methods - from resetting adaptations to replacing components.

What does error 00da mean? Nissan Primera P12?

Code 00da in the self-diagnosis system Nissan stands for "Fuel system control circuit malfunction". However, in practice this error is often false and indicates problems at work ECU, and not for real problems with the fuel supply. In 80% of cases the reason lies in:

• 🔌 Unstable power supply to the control unit (voltage drops, oxidized contacts).
• 📱 ECU firmware failure after an incorrect update or “rollback” of the software version.
• 🔧 Poor grounding block or sensors (especially important for cars with mileage >150 thousand km).
• 🛠️ Chip tuning incompatibilities with standard firmware (if modifications were made).

Important: on Primera P12 error 00da often accompanied dips in speed, by lighting up the "check" (Check Engine) and transition to emergency mode. In some cases, the engine may stall at idle or have difficulty starting when hot.

The main causes of error 00da

To effectively resolve an error, you need to understand its root cause. Below is a table with the most likely scenarios for Primera P12, sorted by frequency of occurrence:

Reason	Symptoms	Difficulty in eliminating
ECU firmware failure	The error appears after chip tuning or disconnecting the battery. "Floating" speeds are possible.	Medium (requires flashing)
Poor contact in ECU connectors	The error occurs periodically, especially during vibration (for example, on a rough road).	Low (contact cleaning)
Throttle Position Sensor (TPS) malfunction	Jerks during acceleration, unstable idle speed. Often accompanied by an error P0120.	Low/medium (sensor replacement)
Engine weight problems	Error 00da combines with other codes (for example, P0300 — misfires).	Medium (checking ground circuits)
Immobilizer malfunction	The engine does not start or stalls immediately after starting. The key icon is flashing on the dashboard.	High (immo diagnostics + ECU)

⚠️ Attention: If the error 00da appeared after battery disconnection or ECU replacement, do not rush to change parts. Try it first reset throttle adaptation (instructions below) - this solves the problem in 30% of cases.

How to diagnose error 00da: step-by-step instructions

For an accurate diagnosis you will need protocol-enabled scanner Nissan Consult (For example, Launch X431 or Delphi DS150E). If you don't have it, you can use ELM327 with the program Nissan DataScan, but the functionality will be limited. Follow the algorithm:

Connect the scanner to the OBD-II connector (located under the steering wheel, to the left of the brake pedal)

Count all errors (not only 00da - accompanying codes are important)

Check the voltage at the ECU contacts (pin 1 - “+12V”, pin 22 - “ground”)

Inspect connectors for oxidation or poor connections.

Reset the errors and check if they appear again after starting the engine-->

If an error is returned, perform additional checks:

1. Throttle Position Sensor (TPS) Test:
   • 📊 Measure the resistance between the contacts 1–2 And 2–3 (should change smoothly when the damper is opened).
   • 🔧 Normal values: 0.5–4.5 kOhm (depending on position).
2. Checking the ECU power supply circuit:
   • 🔋 With the ignition on (engine off), the voltage on the pin 1 there must be 11.5–12.5V.
   • ⚡ When starting the engine, the drawdown should not exceed 0.5V.

💡 Helpful tip: If the scanner shows an error 00da along with P0605 ("ECU ROM error"), this almost always indicates control unit malfunction. In this case, the ECU will need to be reflashed or replaced.

How to check the ground of the ECU?

1. Disconnect the negative terminal of the battery.

2. Locate the ECU grounding point (usually on the body next to the unit).

3. Clean the contact and check the resistance between the ECU ground and the body - it should be close to 0 ohm.

4. If the resistance is high (>1 Ohm), replace the ground wire or clean the mounting location.

Ways to resolve error 00da

Depending on the cause, repair methods can vary from simply resetting adaptations to completely replacing the ECU. Below - step by step solutions, sorted by effectiveness.

1. Reset throttle adaptations

This method works if the error appears after disconnecting the battery, throttle cleaning or replacing the TPS sensor. Instructions for Nissan Primera P12:

1. Turn on the ignition (do not start the engine).
2. Wait 3 seconds.
3. Fully press and release the gas pedal five times in a row (within 5 seconds).
4. Wait 7 seconds.
5. Press the gas pedal all the way down and hold it 10 seconds (before flashing Check Engine).
6. Release the pedal, turn off the ignition and wait 10 seconds.
7. Start the engine and check for errors.

2. Flashing the ECU

If the reset did not help, and the scanner shows errors related to ROM/EEPROM (For example, P0605, P0607), will require flashing. To do this:

• 🔧 Use original firmware file for your ECU version (eg Hitachi H8S for Primera P12).
• 💻 Connect via K-Line adapter (For example, K-TAG or KT200).
• ⚠️ Attention: Continuous power supply 12V definitely! Interrupting the process can kill the ECU.

🔹 Key Takeaway: If you are not confident in your skills, entrust the flashing to professionals. Incorrect software may cause irreversible block damage.

3. Replacing the throttle position sensor (TPS)

If the tests show a malfunction TPS, replace it with a new one (part number for Primera P12: 22680-4M000 or 22680-4M010). After replacement, be sure to:

1. Clear errors with a scanner.
2. Perform throttle valve adaptation (see point 1).
3. Check for air leaks in the manifold.

4. Repair or replacement of the computer

If all the previous methods did not work, the problem is in the control unit itself. Options:

• 🔧 Repair: Replacing the chip EEPROM (if the memory is damaged).
• 🔄 Replacement with a used one: Look for an ECU with the same firmware version (the number is indicated on the unit sticker).
• 💰 New block: Original ECU for Primera P12 costs from 15 000 ₽ (item: 23710-4M000 or 23710-4M010).

Typical mistakes car owners make during repairs

Many are trying to eliminate 00da "at random", which only aggravates the problem. That's what can't do:

• ❌ Reset errors without diagnostics. If the cause is not eliminated, 00da will return, and the ECU may lock up.
• ❌ Change sensors at random. For example, replace Mass air flow sensor in case of error 00da It makes no sense - these are different systems.
• ❌ Use non-original firmware. "Custom" versions of software often conflict with the immobilizer.
• ❌ Ignore immobilizer errors. If the key on the dash is flashing, solve this problem first.

⚠️ Attention: If the engine does not start after replacing the ECU, check immobilizer synchronization. On Primera P12 this may require NATC key (special adapter for linking the block to the immo).

Prevention of error 00da

To avoid the error reappearing, follow these recommendations:

• 🔋 Monitor the voltage of the on-board network. Use a stabilizer or replace the generator if the voltage drops below 13.8V.
• 🔌 Clean the ECU contacts every 2 years. Oxidation is one of the main reasons 00da.
• 🛠️ Avoid cheap chip tuning. Poor-quality firmware often leads to failures.
• 🚗 Check engine weight regularly. Poor grounding causes errors ECU.

🔹 Key Takeaway: Error 00da on Nissan Primera P12 rarely occurs on its own. It is usually preceded voltage drops, poor quality repairs or ignoring minor faults (for example, oxidized contacts).

FAQ: Frequently asked questions about error 00da

Is it possible to drive with error code 00da?

Short term - yes, but not recommended. An error may lead to unstable engine operation, increased fuel consumption or even startup failure. If the problem is in the ECU firmware, long-term driving will aggravate the problem.

How much does it cost to repair an ECU with error 00da?

The price depends on the reason:

• Cleaning contacts + resetting adaptations: 500–1500 ₽.
• Flashing: 3000–8000 ₽.
• ECU replacement: from 10 000 ₽ (used) up to 25 000 ₽ (new).

Can error 00da appear after washing the engine?

Yes, if water gets into the ECU connectors or sensor contacts. In this case:

1. Dry the control unit (you can use a hairdryer at minimum power).
2. Process contacts WD-40 or contact lubricant.
3. Clear errors with a scanner.

How to distinguish a real malfunction from a false error 00da?

A false error is usually:

• Appears periodically (for example, due to vibration).
• Not accompanied real symptoms (the engine runs stably).
• Disappears after reset adaptations or restarting the computer.

If the error constant and there are problems with starting/operating the engine - the reason is serious (for example, a faulty computer).

Where is the ECU located on the Nissan Primera P12?

The control unit is located under the hood, to the right of the battery (if viewed in the direction of travel). It is closed with a plastic cover with the inscription "ECU". To access you need:

1. Disconnect the negative terminal of the battery.
2. Remove the cover (unsnap the 4 clips).
3. Disconnect the connector (after pressing the latch).