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Code Readers

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Can I Fix My Car with a Home Code Reader/Scanner?
Most cars today (anything manufactured after 1996, actually) have an onboard computer that stores trouble codes when something goes wrong with a major component in the engine, transmission or emissions system. By connecting a code...
Should I Buy My Own Code Reader or Scanner?
All cars made from 1996 onward have an onboard computer that detects faults in the engine, transmission and emissions systems, and communicates problems through lights in the dash (your Check Engine Light, for instance)....
What's the Difference Between a Code Reader and a Code Scanner?
In order to determine why your Check Engine Light is on, a mechanic will connect a handheld device to the OBD II connector under your dash (in a vehicle made in 1996 and onward)....

Related questions

ABS T/C error light
Hey there, thanks for writing in about your 2006 Buick Terraza. There is a possibility of the connector C305 under the drivers seat on the rear getting corrosion and damage from water getting on the connector. The connector is not...
EGR P0404 code accelerating. 2005 Buick Terraza
For this code, there is a related technical service bulletin 06-06-04-003D dated March 20,2007. The TSB calls for installing a new EGR kit consisting of a new valve, tube, and wire connector, and directions to reprogram the powertrain control module....
Check Engine Light codes. 2006 Mercedes Benz E55 AMG
Since you are getting many different codes from different areas of the engine, you may need to have the system hooked up to a factory scanner since most of these generic codes do not cross over in my repair software....
Key not recognized by truck - 2006 Mitsubishi Raider
Hello. I would usually start by checking the battery and the connections at the battery. If there is low voltage in the system, then this will occur. If the battery and connections are fine, then the issue is either in...
Torque converter vibrates - 2005 Chevrolet Avalanche 2500
Torque convertor "shuddering" is a cycle where the torque convertor tries to lock up, can't, and re-cycles repeatedly. General Motors has a service bulletin - TSB Reference #3438A, that addresses this issue. Discuss this issue with your dealer.
Replaced oxygen sensors, but code P0135 still visible - 1996 Lexus LX450
P0135 is a "heater circuit" malfunction in the O2 sensor. This is usually a fused circuit. Check your Owners Manual to verify that it is fused, then check that fuse to make sure it isn't blown ("something" caused the old...
CEL limp mode reflash
Hello there. The type of issues you have described are not uncommon with the newer F series diesel trucks. The technical service bulletins are put out as a way to get vehicles repaired properly once a common failure point is...
Won't change gears p2768
Hello there, this is not an uncommon occurrence. The P2768 code is referencing a fault with the input speed sensor. When this occurs the transmission may suffer during gear changes since the car's computer can not tell it when the...
Shifting too slow p0106
Hello. This is actually a common issue on this car. I usually start by making sure that all of the intake tubes are installed tight and correctly and that there are not any leaking vacuum lines. If those are all...
Cruise control quit working
Thanks for writing in about your 1998 Chevrolet C1500 Suburban. I would want to diagnose the brake pedal switch first so I wouldn't replace one that is working fine. A technician using scan tool will easily be able to see...
Load on truck's engine causes loud knocking noise
Hello. It sounds like there may be a problem with the piston or the valves in cylinder 5. Loose rod bearings to the piston can cause a knocking noise and/or a misfire condition. A worn out piston can also cause...
Volvo V50 Won't start new ABS
Hey there, thanks for writing in about your 2007 Volvo V50. You may have to take the vehicle to the dealer to have the systems flashed. The ABS control units are mated to the vehicle, and will not work when...
Coolant leak codes
The code P2187 indicates a lean running situation at idle. More parameters will need to be checked to get to the bottom of this issue. Sometimes false reading from a malfunctioning mass air flow sensor may mess with the vehicle's...
Gas reset button location
Hello. Diagnostic trouble code P1631 is an indication that the theft deterrent password is incorrect. The theft deterrent feature for your vehicle will shut off the fuel to your car until the proper password is sent to the PCM. A...
A Sensor is Faulty
Hello. If the speedometer is not working and you are getting this code, then the vehicle speed sensor needs to be replaced. This will cause all of this to occur. This sensor is located on the transmission. In some cases,...
Fluctuating coolant readings
Hello. Your fluctuating coolant temperature may be caused by a cracked cylinder head or leaking head gasket. It sounds like you have replaced everything else that could be causing this issue. If the head is cracked or the head gasket...
Codes p0136, P0141
Although these codes are both for the downstream O2 sensor, they are completely different. The first code, P0136, has to do with actual sensor performance. The second code, P0141, has to do with the sensor heater circuit performance. The...
Stalls without warning
I have never seen a DTA's message displayed on the dashboard of any vehicle, so I'm not sure what you mean. To determine the problem, you need to "catch the vehicle in the act." Checking fuel pressure and spark when...
Code P2020, and satellite navigation and DVD problems
Hello. The P2020 code is a manufacturers code and not a generic code. The pinpoint test for the code should be done before replacing the manifold flap sensor. Once the pinpoint test is done, it will isolate the failed part...
Which oxygen sensor usually fails first? I don't have a code reader to tell which one is bad.
Hi. In my experience, I haven't really seen one oxygen sensor fail more than the other one. Considering the year of the truck, I would replace all the oxygen sensors on the truck because, if one is going bad, then...

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