Check Engine Light Codes

Question: What could cause my 94 Ford Taurus to quit intermittently? When I scanned it, there is no code and even after I replaced the ignit...

Question: My sister's car quit yesterday and when I checked it, there was no spark on the plug wires and no fuel going to the throttle b...

Question: This car has an intermittent code P0420- catalyst efficiency low coming on and when I checked the downstream oxygen sensor, it was...

Question: This is my grandma's car and she complained to me that the cc (cruise control) suddenly won't work after making a long hig...

Question: Why would my battery goes dead if I leave it parked for 4-5 days? There is no code when I had it scanned at a local parts store an...

Question: This car has a code P0133- 0xygen sensor signal slow and when I tested it using a voltmeter, I got 0.4 volt with key on engine off...

Question: My wife's 1997 Honda Odyssey battery light is on all the time and the alternator won't charge. I replaced the alternator w...

Question: This 1997 Wind Star is having a misfire code after the engine is warmed up. When scanned there is no coolant sensor code except th...

Question: I have a 1999 Cavalier and lately, I have an intermittent hesitation and misfiring and the check engine light will come on in the ...

Question: Have this code P0402-egr control back pressure transducer valve on my Altima and when I tested it, found the egr valve sticking. R...

Question: My 2001 Grand Am has a misfire code P0301 when scanned. The engine was also quitting at stop lights. Initial repairs included repl...

Question: This 1990 Chevy Corsica has a code 32-egr system fault after I scanned it with OBD1 scanner. When I checked the egr system, I foun...

Question: This truck's engine serpentine belt was sqealling and before I could replace it, it broke on me, how do you replace it? ATS Ad...

Question: Why would my water pump started to leak 2 weeks after I replaced it and AGAIN after almost 3 months? I bought this water pump from...

Question: This 2000 Jeep Sport Cherokee has this check engine light coming on and when scanned, a code P0123-tps voltage abnormally high sho...

Question: This 2000 Hyundai XG300 runs pretty good but 3 days ago, the check engine light showed up accompanied by codes P0171-Bank 1 system...

Question: My minivan has poor power accompanied by hesitation on acceleration and stalling on stop signs. When scanned, I have code 41. I ha...

Question: I have driven this 2000 Dodge Durango truck since new and starting last week, my passenger side carpet under the dash is wet with ...

ATS Question: My wife's car suddenly quit on her while she stopped for groceries. She had it towed to our garage so I can check it. I fo...

Question: My car quit on me yesterday and following ATS course, I found it has no spark. As per your lesson, this problem is caused by crank...

This is just a reminder for everybody during this cold weather When boosting your vehicle battery, remember these: Connect cables colored RE...

Question: Four days ago, my Grand Am started misfiring and when I scanned it, I got code P0302 cylinder #2 misfire. Using your earlier advic...

Question: My mother's Ford Escort would hesitate only when running at highway speeds as if the engine is running out of gas. When this h...

Question: My uncle's 97 Camry has the dash check engine light coming on all the time. Found code P0340 which stands for camshaft positio...

When performing test for your body control module (bcm), here are some quick tips in testing this module: Get hold of the bcm wiring diagram...

Question: My check engine light keeps coming on and got a code P0303 misfiring code on cylinder #3. I checked the compression on this cylind...

Question: As per your ATS instruction manual, I changed the egr valve, dpfe sensor, egr solenoid including the blowing of air passages of th...

Question: The windshield wiper motor will not stop until the fuse is taken off. I am scratching my head here because I thought replacing the...

Question: This car quits after being driven for 5 miles. It starts right away when re-started but I am puzzled because there is no code when...

Question: This car quits after being driven for 5 miles. It starts right away when re-started but I am puzzled because there is no code when...

Question: My sister's 1996 Ford Taurus has a weird problem: the power steering pump shoots oil as soon as the engine is started. We inst...

Question: The last few days, I am getting poor acceleration on this engine. When I scanned the codes, I got code 44 -lean exhaust. I have do...

Question: My engine runs OK as long as I don't use the front dash defogger. If I set the AC button to floor setting, again engine runs f...

Question: My wife's Grand Am has a rough idle and it has code 35 when scanned. As per ATS info, most of this problem is solved by fixing...

Question: My daughters car is stalling at stop lights and if she waited for 15 minutes, it would start again. I changed the spark plugs and ...

Question: My F150 pick up truck has a bad rough idle and would surge/stall at times. After scanning, I got a code P0506- Idle air control sy...

Question: What can cause my scanner not to communicate with my engine computer during no start. When this intermittent no start happens, the...

Question: How do you keep the windshield washer fluid from not freezing in the windshield? I have to stop my minivan every 20 minutes to cle...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what...

Question: My sister's 2001 Ford Focus check engine light is on and it is hesitating. After scanning for codes, I got P0121 which is a fa...

Question: My car is hesitating and came with this code P0340 which is a camshaft sensor fault and my mechanic replaced it including the sync...

Question: My dash panel is driving me crazy because it would come on and off while I am driving. Also, the windshield wipers will not shut d...

Question: This truck will not start despite the fact that it has spark and injector signal. I also replaced the maf sensor and the engine co...

Click this link for the image! Question: I have this check engine light in my dash and have a code for it. My problem is I don't know h...

Question: My vehicle is running fine but my check engine light would come on intermittently once in a while. When I scanned for codes, it wa...

Question: My car is running rough and stalls at stop lights. When I scanned for codes, I got P0121-Throttle/Pedal position sensor A circuit ...

Question: My minivan quit on me yesterday and I did a quick tune up changing the spark plugs and wires including air and fuel filters and it...

Question: My check engine light is on and I got this code P0441 Evaporative System Incorrect Purge Flow after I scanned it. I checked the fu...

Question: These last few days my starter does not work all the time. When I first started it, all I hear is the clicking sound. After a few ...

Question: My battery was going dead on me and when I checked my battery voltage at idle, it was discharging. After cleaning all the grounds ...

Question: My dash panel light is always on for about a week and when I scanned it, 2 codes showed up: P0171 lean bank 1 and p0174 lean bank ...

Question: My Truck's wiper motor is acting up lately, it would OK and then abruptly quit working unless I manually move the blades to sh...

Question: I have this car that I bought from the auction lot a month ago and would not start on me yesterday. There is no spark but I have a...