2010 Ram 1500, Alternator Not Charging, Code P2504

This 2010 Ram 1500 Pickup came in with the complaint that the alternator and the battery have both been replaced but the battery still keeps going dead. Checking the voltage at the alternator output post while the engine was running found that the alternator was charging. The image below shows the alternator charge voltage on … Continue reading “2010 Ram 1500, Alternator Not Charging, Code P2504”

2004 Ford F250 5.4 Liter, Engine Stalls, Code P0231

This 2004 Ford F250 with a 5.4 liter gas engine came in with the complaint that the engine would occasionally stall. Testing found a code P0231 stored which indicates a problem with voltage to the fuel pump. Studying a wiring diagram showed several things. Number one is that when the fuel pump relay is engaged … Continue reading “2004 Ford F250 5.4 Liter, Engine Stalls, Code P0231”

2008 Chevrolet HHR-Reduced Power-Code P0641

This 2008 Chevrolet HHR came in with the complaint that the check engine light would come on, the reduced power message would display and the car would no longer accelerate. There was a code P0641 stored. The code p0641 means that the 5 volt reference is outside of the 4.8 to 5.2 voltage range needed … Continue reading “2008 Chevrolet HHR-Reduced Power-Code P0641”

2009 Dodge Journey A/C Not Cold – Strange Pressure Readings

I had an interesting problem vehicle in my shop. It is a 2009 Dodge Journey with the 2.4L engine and an electronically controlled variable displacement compressor. I am working on it after others have failed to repair the system.  No one can tell me how the original compressor failed or why they replaced it so … Continue reading “2009 Dodge Journey A/C Not Cold – Strange Pressure Readings”

2010 Toyota Tacoma IG1 2 Fuse Blows – Battery Goes Dead

This 2010 Toyota Tacoma came in with the complaint that the IG1  No2 fuse would blow sometimes. The IG1 NO2 fuse is located in the interior fuse box behind this panel. After pulling the door open the whole unit can be lifted up and off of the hinge detents. The interior fuse box legend with … Continue reading “2010 Toyota Tacoma IG1 2 Fuse Blows – Battery Goes Dead”

2004 Nissan Frontier-Gauges Inop-Code P0500

This 2004 Nissan Frontier came in with the complaint that the gauges had been working erratically for several months but not they have stopped working altogether. The customer had stated that the gauges and odometer would stop working and that he would tap on the dash and they would come back on. The also said … Continue reading “2004 Nissan Frontier-Gauges Inop-Code P0500”

2007 Chevrolet Monte Carlo SS Emissions 1 Fuse Blows

This 2007 Chevrolet Monte Carlo SS came in with multiple complaints including the Emissions 1 fuse blowing in the underhood fuse box. Also there were several codes being set in the PCM as a result, P0030, P0036, P0053, P0054 and P0443. All can be related back to the blown Emissions 1 fuse. Because the Emissions … Continue reading “2007 Chevrolet Monte Carlo SS Emissions 1 Fuse Blows”

2007 GMC Yukon Multiple Misfires-Codes-P0300-P0352-P0354-P0356-P0358

This 2007 GMC Yukon came in with multiple complaints among which were the engine seemed to have no power, the Service Engine Soon, ABS and Traction lights were on and there was a stability message displayed in the Driver’s Information Center (DIC). The customer also stated that the vehicle ran fine sometimes but as soon as the … Continue reading “2007 GMC Yukon Multiple Misfires-Codes-P0300-P0352-P0354-P0356-P0358”

Changing the Crank Sensor ,Code P0335, On An H2 Hummer

In case you were ever wondering how to change a crank sensor on an H2 Hummer all I can say is you need to be about six feet tall and be able to get into the following positions.   Much shorter and you will not have the arm length needed. Much taller and I am … Continue reading “Changing the Crank Sensor ,Code P0335, On An H2 Hummer”

2007 Ford F150 Battery Light Stays On

This 2007 Ford F150 came in with the complaint that the battery light would come on about 30 seconds after the engine was started. The voltmeter in the dash indicated the alternator was charging. Checking the system with my charging system analyzer found the charging voltage was good at 14.23 volts and the amperage was … Continue reading “2007 Ford F150 Battery Light Stays On”