Jan 112018
 

2005 Nissan Micra

I have just bought a Nissan Micra 2005 and have noticed that it’s really hard to shift gear and the engine makes a struggling noise when I press the clutch down while in neutral or gear. Luckily, I have 3 months warranty and will be taking it back to be fixed. I’d like to know what’s most likely to be the cause of this problem please, and if the fix job could easily be masked to make the car run longer?


Hard to shift gear

  • Hard to shift gears – Most likely failing clutch master cylinder and clutch slave cylinder
  • Noise when clutch pedal is pressed – Clutch release bearing failing

The most common fix would be to replace the clutch master and slave cylinders. Also replacing the clutch, clutch pressure plate and release bearing.

 

Jan 112018
 

Nissan Altima

I have a 2006 Nissan Altima 2.5 4 – I replaced the pre-cat with a header because I heard that they would break apart and ruin the engine. However, now the engine light keeps coming on. Will an O2 sensor simulator fix the issue. I have tried to put a spacer on the header, but that did not help. I am told there are 2 o2 sensors, but only find 1. Thanks for any help!!


Removing Catalytic Converter

Replacing the exhaust manifold with a header is generally done for performance reasons (note* the exhaust manifold and catalytic converter are one assembly). There is nothing that would break apart and enter the engine as far as the catalytic converter is concerned. This is because it is mounted out the output side of the engine cylinder head.

catalytic converter with O2 sensor location diagram - 2006 Nissan Altima

Using O2 Sensor Simulator

The original setup includes two oxygen sensors. One before the catalytic converter and one after. The Oxygen sensor that is mounted before the (upstream)converter is used to determine air/fuel mixture. The O2 sensor mounted after the converter(downstream) is used to determine the efficiency of the converter. So if the simulator you are proposing to use is to fake out the downstream sensor, then yes it should take care of the check engine light issue.

Nov 012017
 

1997 Nissan Altima

My car is dead. I put in new battery and it is still dead. What to check?


  • Look at the battery connections for corrosion or being loose.
  • Check battery cables for internal corrosion.
  • Check Fusible Link in positive battery cable. Located between battery and alternator.
  • Faulty ignition switch or poor connection
  • Wiring Harness

Starting System Wiring Diagram – 1997 Nissan Altima

(best viewed in Google Chrome or Firefox)
1997-nissan-altima-starting-circuit-1-of-1

Sep 252017
 

Nissan Maxima

Multiple Codes

Car has 152,000 miles. Car idles and revs fine while in park. When driving it clatters and looses power it you give it more than 25% throttle. I took it to Firestone and they did a diagnostic on it and it gave them the following codes:P0420- CATALYST EFFICIENCY BELOW NORMAL (BANK 1)…..P1574-ASCD VEHICLE SPEED SENSOR MALFUNCTION….P0300-MULTIPLE MISFIRE DETECTED….P0720TCM REVOLUTION SENSOR CIRCUIT MALFUNCTION. The mechanic at Firestone said that he does not know why the car is acting like this and referred me to a Nissan dealer. I am trying to avoid that because I know the cost would be astronomical for them to diagnose and fix it. It was running fine and then all the sudden it was like it is possessed. Any ideas?


The code P0420 generally means the catalytic converter isn’t functioning as it should. Now if you have been driving it with a misfire for a while it may have caused a larger issue. The unburnt fuel gets shoved out into the catalytic converter and can cause it to clog. If the converter is clogged it will act as you described. A back pressure gauge is inserted in the front O2 Sensor port to check for this. If there is more than 3 psi at 1500 rpm the converter is clogged. Generally if this is the case the car will perform normal at first and as the engine warms up the performance will fade. I have provided the code information below.

Nissan Code P1574

Description: Automatic Speed Control Device Vehicle Speed Sensor

Code P1574 Probable Causes

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty

Nissan Code P0720

Description: Output Shaft Speed Sensor Circuit

Code P0720 Probable Causes

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. Transmission system malfunction

Nissan Code P0420

Description: Catalyst System Efficiency Below Threshold Bank 1

Code P0420 Probable Causes

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. HO2S sensor contamination/damaged
  7. Exhaust leaks or restrictions
  8. Catalytic converter damage
  9. Catalytic converter improper operation

Nissan Code P0300

Description: Random – Multiple Misfire Detected

Code P0300 Probable Causes

  1. Vacuum leaks, damaged hoses or improper routing
  2. Fuel contamination
  3. Ignition system – Ignition module, coil, spark plugs and wires
  4. Fuel system
Sep 182017
 

2006 Nissan Almera

Will not move

My car starts alright but will not move. The previous day my first and second gears took a long time to accelerate and there was a smell of something burning (clutch probably) after my drive.


Sounds about right. If the clutch is slipping or worn out the vehicle will not want to move. Something you can try. Hold the brake and let out on the clutch pedal. It the engine does not die, the clutch is shot.

Sep 112017
 

Nissan Titan

Spitting and sputtering

My Nissan Titan if you gassed it one time, would spit and sputter but not die. We would kill it then start it again and it would be fine. Now it slowly progressed and now it’s spitting and sputtering and will actually die on us. We have to kill it and start it back at every stop sign and red light and as were going well have to put it in neutral and kill it too. It acts like either the throttle body, fuel filter or fuel pump is acting up but we’re not sure which it could be.


The first step would be to have any codes pulled and post them. You can get the codes pulled for free at just about any local auto parts store.

Jun 142017
 

 Nissan Frontier

Replacing the factory transmission cooler

So I was thinking about replacing the factory transmission cooler with an aftermarket trans cooler. I replaced transmission about 2 years ago. I do not want to burn this one up. Should I be doing something different?


Heat is the number one cause for transmission failure. You are thinking along the right lines as far as what can be done for precautionary measures.

You might want to consider making sure both your cooling fan relays are functioning properly as well. In conclusion there is a low and high fan relay.

How to check your cooling fan

The cooling fan will operate at low speed with the power being supplied through the low speed fan relay. Place the air conditioning to maximum and the High speed fan relay should kick in and supply the cooling fan with power. You should be able to see the fan speed increase since it is functioning properly.

Jun 062017
 

Nissan Altima

Will not start until the engine is cold again

I have a 2003 Altima. It will start without any problems cold. But after driving for a while and turning off the car it will not start until the engine is cold again. I have replaced both cats, o2 sensors, the cam and crankshaft sensors to no avail. Please help if you have any idea what this could be I’m extremely frustrated with this car because I cant figure this out. I’m soon to replace the head gasket and fuel pump but I’m tired of throwing money at this car with no solution.


 

Jun 062017
 

2009 Nisan Cube

Check engine light keeps going on and off

My check engine light keeps going on and off, so I went to a mechanic to get a diagnosis. They told me that they found oil contamination on the spark plugs from an internal leak. The spark plug tube seal caused the contamination on the spark plugs and catalytic converter. He’s recommending that in order to get rid of the Service Engine Light I need to replace not only the spark plugs, but the catalytic converter, O2 sensor, gasket plugs, valve cover gasket, exhaust gaskets and etc. In total he’s charging me $2300 for parts and labor. I’m trying to get a second opinion rather than drop all this money without knowing if there’s a cheaper/alternate route. Thank you.


Post the diagnostic codes and we can find the cheapest solution.