1999 Lexus ES300 - P0420

Problem: P0420 - Catalyst efficiency below threshold (bank 1)

Solution: Replaced the catalytic converter.

1998 Honda Accord EX 5 Speed P0171 and P0170

P0171 - System too lean (bank 1)
p0170 - Fuel trim malfunction (bank 1)

Solution: Will post exactly what was done as soon as we get to this one.

2000 Nissan Altima - P0325 and P1126

P0325 - Knock sensor 1 circuit malfunction bank 1 or sensor 1
P1126 - Manufacturer control fuel air metering

Solution: Will post exactly what was done when we get to this one.

1995 Honda Civic EX Vtec

Problem: The temperature gauge on the dashboard always indicated the car to be cold. Obviously, not working.

Solution: There could be a couple of things wrong, so I started the elimination process. First, I wanted to make sure that the temperature sensor in the engine (one wire only) was not faulty. I took off the sensor and grounded the wire. If the sensor was bad, the dashboard indicator should have moved all the way up. In this case, it didnt move at all. Stayed in the same place. This means that there is something faulty with the wiring most likely and the instrument panel. I will replace the instrument panel and test to see.

Actually, we found out the sensor was bad and replaced it. Everything worked again.

2000 Buick Regal - P0481

P0481

We are getting this code on a 2000 Buick Regal. I started by checking the fuses, checking the connector to the fan, basic 1st steps. I found out that the fuse (located under the hood) for Fan #2 was bad. I replaced it with another 15 amp fuse and reset the check engine code. This solved the problem instantly. After turning the car on, the service engine light did not come on. It used to come right on after resetting the service engine light before we did the fix.

2000 Nissan Sentra - P1491

P1491 - Manufacturer Control Auxilary Emissions Control

We are getting this code on the 2000 Nissan Sentra. We replaced the cutoff valve ($70.00 dollars from the dealer). This valve is a white plastic connector with 4 hoses attached to it. It is located right next to the evap canister. The code came up after a couple of days of driving. We then replaced the cutoff bypass valve which is connected to the cutoff valve. This has seemed to solve the problem.

2000 Nissan Maxima - P1320 and P0300

P1320 - Manufacturer Control Ignition System or Misfire
P0300 - Random/Multiple cylinder misfire detected

Solution: We replaced the ignition coils and that took care of the problem. Seems to be very common with the Maxima's.

1999 VW Jetta - P0422

P0422 - Main Catalyst Below Threshold

Solution: Replaced catalytic converter. That took care of this problem.

2000 Lexus ES300 - P0171 and P0110

P0171 - System Too Lean (Bank 1)
P0110 - IAT sensor circuit malfunction

IAT = Intake Air Temperature

Solution: Replaced Mass Air Flow sensor and Oxygen Sensor

1998 Nissan Pathfinder - P0450, P1444, and P1446

P0450 - Evap Emission Control System Pres Sensor fault
P1444 - Manufacturer control auxilary emission controls
P1446 - Manufacturer control auxilary emission controls

Solution: ordered new canister and valve from Nissan dealer. Installed and that took care of the problem.

2002 Nissan Altima - P0335

P0335- Crankshaft Position Sensor A Circuit Malfunction

Ordered Crankshaft position sensor from Nissan dealer and replaced. This tool care of the problem.

1998 Toyota Camry - P1130, P1135, and P0171

P1130 - Manufacturer Control Fuel Air Metering
P1135 - Manufacturer Control Fuel Air Metering
P0171 - System Too Lean

I got the above codes on a 1998 Camry and we replaced the fuel air metering sensor. That took care of the problem.

2001 Ford Taurus - P0401

P0401 - EGR Flow Insufficient

This is the code I was getting on a 2001 Ford Taurus. I ended up replacing the EGR Pressure sensor, it has two vacuum lines attached to it and a plug, and it took care of the problem.

2000 Honda Civic EX - Radio Code

I was in need of obtaining a code to the radio for this car. After talking to the dealer, I learned that I needed to provide them with a radio serial code so they could provide me with a code. In this case, the seial number for the radio was m98d350329. The radio code resulted in 35446. I know that every car is different, but I just wanted to document the process for next time...

2000 Dodge Neon - P0456

P0456 - Evap Emission Control System Leak (very small)

I am getting this on my 2000 Dodge Neon. I have yet to fix the code. I am starting to document all the codes that I get and then I will edit the posts.

Solution: We ended up changing the solenoid and that did the trick.

1999 Dodge Caravan - P1495

P1495 - Leak Detection Pump Solenoid Circuit

I was getting this code on a 1999 Dodge Caravan. We ended up replacing the leak detection pump solenoid from another van and placed it in the van with the problem and the problem still wouldnt go away. We then replaced the computer on the car with another one of a same type van, and that did not work. As soon as you turned the car on you would see the "service engine soon" light. In fact, you couldn't delete the code from the computer. As soon as you hit "erase" code on the obdII tool, the tool would indicate that "1 code still remains". So, to put the story short, we found out that the sensor had a cable that was "open" -- not making a connection to the computer. We concluded and tested this with a voltmeter and following the sensor to the PCM. 2 out of the 3 wires were okay. The one that was not making it through was the white with a black stripe.