Nissan Cefiro (A31, A32, A33) errors: code decoding and troubleshooting instructions

Nissan Cefiro - a legendary business class sedan, released in 1988 and gaining popularity due to its reliability, comfort and dynamics. However, even this model has weaknesses that appear with age. Owners A31 (1988–1994), A32 (1994–1998) and A33 (1998–2003) often encounter engine errors, automatic transmission problems RE4F04A and electronic glitches. In this article we will look at 10 most common mistakes, their causes and solutions - from diagnosis to repair.

Feature Cefiro - complex electronics for its time, which today require attention. For example, error P0300 (misfire) may indicate both worn-out spark plugs and problems with distributor or ignition coils. And the code P0740 in the box is often associated with worn solenoids or low oil level ATF. We have collected data from forums, manuals and the experience of technicians to help you save on diagnostics and avoid common mistakes during repairs.

1. Engine errors: misfire (P0300, P0301–P0306)

Series errors P030X (where X is the cylinder number) - one of the most common in Nissan Cefiro, especially on engines VQ20DE (2.0 l) and VQ25DE (2.5 l). The reasons vary from trivial (candles, wires) to serious (problems with ECU or fuel system).

First check:

• 🔥 Spark plugs - on Cefiro recommended NGK PFR6A-11 or Denso K20PR-U11. Worn or incorrect clearance (should be 1.1 mm) lead to omissions.
• ⚡ High voltage wires - resistance must be within 5–10 kOhm. Check with a multimeter.
• 🛢️ Ignition coils - on A32/A33 often fail due to overheating. Test with an oscilloscope or replace it with a known working one.
• 🔧 Distributor - on A31 with engine RB20DE The camshaft position sensor may require cleaning or replacement.

If the error remains after replacing the spark plugs and wires, check:

• 🔍 Compression - the norm for VQ25DE — 12–14 bar. The spread between cylinders is more than 1 bar indicates worn rings or valves.
• 💧 Injectors — clogged or leaking injectors cause the mixture to become over-rich. Clean with ultrasound.
• 📊 Oxygen sensor - error P0130 often accompanies P0300. Check the voltage at the connector (should be 0.1–0.9 V).

⚠️ Attention: On Cefiro A33 with VQ25DE misfires may be caused by malfunction of the ignition coils from Infiniti I30 (similar ones were installed on these models). When replacing, take the original Nissan 22448-4M000 or Hitachi C1136 — cheap analogues burn out after 10–15 thousand km.

2. Problems with the automatic transmission (P0740, P0730, P0776)

Automatic transmission RE4F04A (4speed) on Cefiro famous for its reliability, but after 200–250 thousand km Typical problems begin to appear. Let's look at the most common mistakes:

Error code	Reason	Remedy
P0740	Torque converter lock-up malfunction	Solenoid check TCC, oil change ATF (recommended Nissan Matic-D)
P0730	Incorrect gear shifting	Speed sensor diagnostics, oil level check, filter replacement
P0776	Pressure solenoid malfunction	Solenoid replacement Pressure Control, box adaptation
P0720	Problems with the output shaft sensor	Checking the wiring, replacing the sensor (original Nissan 32530-4M000)

If the box kicks or doesn't change gears, start by changing the oil and filter. For RE4F04A critical level ATF - it should be on the mark HOT at operating temperature (70–80°C). Use only original oil Nissan Matic-D or equivalent Idemitsu ATF Type-J.

If there is an error P0740 (torque converter lockup) check:

• 🔧 Solenoid status TCC - often jams due to dirt.
• 📉 Oil level - low levels cause slippage.
• 🔄 Software TCU - on A33 Re-flashing is required for correct operation.

⚠️ Attention: If after changing the oil the transmission starts to perform worse, the adaptive algorithm may have been reset. To restore normal operation it is required training procedure via a scanner (for example, Consult-III or Launch X431). Without this, gears will shift jerkily.

3. Electronics and ECU errors (P0605, U1000, B1318)

Electronics Nissan Cefiro - one of the most vulnerable places, especially on cars over 20 years old. Common mistakes:

• P0605 - malfunction ECU (engine control unit).
• U1000 — loss of communication with other units via the bus CAN.
• B1318 - problems with the immobilizer (NAT).

Reason P0605 often lies in oxidized contacts ECU connector or block overheating. On A32/A33 The ECU is located under the glove compartment - check for corrosion. If the block is not responding, try:

1. Reset errors via scanner.
2. Ring food (12 V on contact 16 connector).
3. Reflash the ECU (if you have access to the dump).

Error U1000 indicates problems with the tire CAN. Most often the culprits are:

• 🔌 Oxidized contacts in the sockets under the steering wheel.
• 📡 Faulty unit BCM (Body Control Module).
• 🔋 Voltage drop in the on-board network (norm: 13.8–14.4 V).

For diagnostics B1318 (immobilizer) check:

• 🔑 Chip in the key - often breaks down or loses connection with the antenna.
• 📶 Immobilizer antenna around the ignition switch.
• 🔧 fuse 10 A in the block under the hood (marked as NAT).

How to reset an immobilizer error without a scanner?

On some versions Cefiro A32 you can reset the error B1318by following the following procedure:

1. Insert the key into the ignition.

2. Rotate to position ON (don't start it).

3. Wait 10 minutes - the immobilizer lamp should go out.

4. Start the engine.

If the procedure does not help, diagnostics with a scanner or replacement of the chip in the key is required.

4. Engine overheating and cooling system problems

Nissan Cefiro prone to overheating, especially on engines RB20DE (A31) and VQ25DE (A33). Main reasons:

• 🚰 Radiator leak — plastic tanks crack over time.
• 🌀 Faulty thermostat - gets stuck in the closed position.
• 🔄 Pump wear - on VQ25DE fails after 100–120 thousand km.
• 💨 Clogged air conditioner radiator — impairs the airflow of the main radiator.

If the temperature rises higher 100°C, stop immediately and check:

1. The antifreeze level in the expansion tank (should be between MIN And MAX).
2. Cooling fan operation (must turn on when 95–98°C).
3. The condition of the hoses is Cefiro The lower pipes often crack.

On A33 with VQ25DE pay special attention cylinder head gasket. When overheated, it breaks through between cylinders 3 and 4, which leads to antifreeze getting into the oil. Signs:

• 🟤 Emulsion on the dipstick (a mixture of oil and antifreeze).
• 💨 White smoke from the exhaust.
• 🔥 Increasing oil level.

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If the engine still gets hot after replacing the thermostat, check temperature sensor (connector next to the thermostat). On Cefiro A32 He often lies, which is why the fan does not turn on.

5. Problems with the fuel system (P0171, P0172, P0420)

Errors P0171 (lean mixture) and P0172 (rich mixture) on Nissan Cefiro usually associated with:

• 🔍 Air leak — Check the vacuum hoses and intake manifold.
• 🛢️ Clogged injectors - ultrasonic cleaning once every 60–80 thousand km.
• 🔧 Faulty MAF-sensor (mass air flow sensor).
• 💧 Fuel leak — check the fuel pressure regulator (normal: 2.8–3.2 bar).

On A31 with RB20DE common problem - fuel line leak under the hood. The tubes crack over time, leading to a drop in pressure and an error P0171. Replace them with silicone or copper.

Error P0420 (low catalyst efficiency) on Cefiro often appears due to:

• 🔥 Catalyst wear - on the run 150+ thousand km It’s better to remove it and install a decoy.
• 🛢️ Problems with lambda probes - check the voltage on the second sensor (should be 0.1–0.9 V).
• 💨 Air leak after MAF-sensor.

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On Nissan Cefiro A33 with VQ25DE error P0420 may be false due to incorrect ECU firmware. In some cases, flashing to Euro-2 without catalyst.

6. Suspension and steering problems

Suspension Cefiro soft and comfortable, but after 150 thousand km requires attention. Typical problems:

• 🔧 Wear of silent blocks — especially the front levers. On A32/A33 use polyurethane bushings.
• 🛞 Shock absorbers leaking — original Kayaba serve 100–120 thousand km.
• 🔄 Knock in the steering rack - requires adjustment or replacement.
• 🛑 Wheel bearing wear - hum at speed 60–80 km/h.

On A31 weak point - ball joints. They fail after 80–100 thousand km, which leads to play and uneven tire wear. When replacing, take Febi 24360 or TRW JBJ737.

If the steering wheel becomes stiff or appears buzzing sound when turning, check:

• 🛢️ Power steering fluid level (use Nissan PSF).
• 🔧 Power steering pump - often leaks through the seal.
• 🌀 Steering rack - on A33 may require replacement of seals.

7. Problems with electrical equipment (generator, starter, wiring)

Electrics Nissan Cefiro - a headache for many owners. Frequent faults:

• ⚡ Battery undercharge - the generator or relay regulator is to blame.
• 🔋 Oxidation of battery terminals - leads to voltage sags.
• 🔌 Broken wiring - especially in the harnesses under the hood.
• 🔑 Faulty starter - on A31 Bendix often jams.

If the battery light on the instrument panel is on, check:

1. The voltage at the battery terminals when the engine is running (should be 13.8–14.4 V).
2. The condition of the alternator belt is Cefiro he stretches after 50–60 thousand km.
3. Diodes in the generator - test with a multimeter.

On A32/A33 often fails ignition relay (located in the block under the steering wheel). Signs:

• 🚗 The car stalls while driving.
• 🔑 The starter does not turn when you turn the key.
• 💡 Dim tidy light.

Replace the relay with the original Nissan 25230-4M000 - Chinese analogues burn through 1–2 months.

FAQ: Frequently asked questions about Nissan Cefiro errors

🔧 Why does the idle speed fluctuate on the Cefiro A32 with VQ20DE?

The reasons may be the following:

• 🧹 Dirty throttle body - requires cleaning (use Liqui Moly Pro-Line Drosselklappen-Reiniger).
• 🔧 Faulty IAC-valve (idle air control). Check resistance (normal: 10–14 Ohm).
• 💨 Air leak through a cracked intake manifold or hoses.
• 📊 Problems with MAF-sensor - try turning it off and checking the engine operation.

If cleaning the throttle and replacing IAC didn't help, check wiring from ECU to the throttle - the wires often fray.

🚗 Why does the RE4F04A transmission kick when shifting from 1st to 2nd gear?

This is a typical problem RE4F04A on the run 150+ thousand km. Reasons:

• 🛢️ Wear of clutches 1–2 gears - requires disassembly and replacement.
• 🔧 Solenoid malfunction Shift A - check the resistance (normal: 10–15 Ohm).
• 📉 Low level ATF or old oil.
• 🔄 Box adaptation failures - Reset via scanner required.

A temporary solution is to change the oil to Nissan Matic-D and additive additive Liqui Moly ATF Additive. But if the clutches are worn out, only repair will help.

🔥 Why is the Check Engine light on on Cefiro A33 with VQ25DE and the car jerks?

Most likely the problem is ignition coils or wiring. On A33 coils often fail Infiniti I30, which are placed instead of the original ones. Diagnostic procedure:

1. Read errors to the scanner (eg. P0300–P0306).
2. Swap the coils - if the error transfers to another cylinder, the coil is faulty.
3. Check the coil resistance (primary winding: 0.5–1.0 Ohm, secondary: 8–12 kOhm).
4. Inspect the connectors ECU for oxidation.

If the coils are ok, check distributor (on VQ25DE It is electronic and may malfunction).

💡 Why don’t the instruments on the dashboard (speedometer, tachometer) work?

On Nissan Cefiro This is a problem related to:

• 🔌 Oxidation of connectors on the back of the dashboard.
• 📉 Malfunction instrument clusters — paths often burn out.
• 🔧 Broken wiring from the speed sensor (located on the box).

For repair:

1. Remove the dashboard (unscrew the 4 bolts in the corners).
2. Test the circuits with a multimeter.
3. Solder the broken traces (use a soldering iron 60 W and solder with rosin).

If you are not confident in your abilities, contact an auto electrician - repairing the combination requires care.

🛑 Why doesn’t the Cefiro A31 with RB20DE start, but the starter turns?

The reasons may be the following:

• 🔥 No spark — check the ignition coil and distributor.
• 🛢️ No fuel supply — listen to whether the fuel pump is working (it should buzz when the ignition is turned on).
• 🔧 Malfunction ECU - on A31 The block often fails due to corrosion.
• 📊 Broken timing belt - on RB20DE this leads to bending of the valves.

Check first fuses (especially EFI 15 A And Ignition 10 A). Then test the spark and fuel pressure (standard: 2.8–3.2 bar).