Check Engine Light Codes

The check engine light codes in your dash panel are the quickest way to fix your vehicle problem.

Saturday, March 24, 2007

Intermittent NO SPARK on 1994 Ford Taurus with 3.0L engine: NO CODES

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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...
Thursday, March 22, 2007

No spark and no fuel on 1991 Mitsubishi with 4 cylinder engine: NO CODES

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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...
Wednesday, March 21, 2007

P0420 code on 1998 Honda Civic with 1.6L engine

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Question: This car has an intermittent code P0420- catalyst efficiency low coming on and when I checked the downstream oxygen sensor, it was...
Monday, March 19, 2007

Cruise control won't work on 1998 Chevy Cavalier: No codes

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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...
Sunday, March 18, 2007

Battery goes dead if left after 5 days on 2001 Nissan Pathfinder: No codes

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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...
Saturday, March 17, 2007

P0133 Code for 98 Saturn with 1.9L engine.

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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...
Tuesday, January 23, 2007

Battery light is on and alternator not working on 1997 Odyssey Honda with 2.2L engine: No codes

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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...
Monday, January 22, 2007

P0303 misfire code for 1997 Ford Wind Star with 3.8L engine

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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...
Sunday, January 21, 2007

Car hesitates on 1999 Cavalier with 2.2L engine: No codes

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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 ...
Saturday, January 20, 2007

P0402 code for 1999 Nissan Altima with 2.4L engine

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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...
Friday, January 19, 2007

Code P0301 on 2001 Pontiac Grand Am with 2.4L engine

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Question: My 2001 Grand Am has a misfire code P0301 when scanned. The engine was also quitting at stop lights. Initial repairs included repl...
Thursday, January 18, 2007

Code 32 on 1990 Corsica with 3.1L engine

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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...
Friday, January 12, 2007

Serpentine belt installation for 2003 GM p/up truck: No codes

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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...
Sunday, January 07, 2007

After market water pump for 2003 Honda Civic has to be changed twice in the last 3 months: No codes

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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...
Friday, January 05, 2007

P0123 TPS Code for 2000 Jeep Sport Cherokee with 4.0L engine

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Question: This 2000 Jeep Sport Cherokee has this check engine light coming on and when scanned, a code P0123-tps voltage abnormally high sho...
Tuesday, January 02, 2007

P0171 and P0174 codes for 2000 Hyundai XG300 with 3.0L engine

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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...
Monday, January 01, 2007

Code 41 with severe stalling on 1993 Dodge Caravan with 3.3L engine

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Question: My minivan has poor power accompanied by hesitation on acceleration and stalling on stop signs. When scanned, I have code 41. I ha...
Sunday, December 31, 2006

No HEAT in truck cab for 2000 Durango: No Codes

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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 ...
Saturday, December 30, 2006

No Start on 2000 Dodge Intrepid with 2.7L engine: No codes

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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...
Monday, December 11, 2006

No spark for 1992 Olds ninety Eight with 3.8L engine: No Codes

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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...
Friday, December 01, 2006

Boosting your battery cables can be deadly...shuts down whole systems: No Codes

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This is just a reminder for everybody during this cold weather When boosting your vehicle battery, remember these: Connect cables colored RE...
Wednesday, November 29, 2006

Code P0302 causing misfire for 1996 Pontiac Grand Am with 2.4L engine

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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...
Monday, November 27, 2006

Code 181 for 1994 Ford Escort 1.9L accompanied by hesitation and cutting out.

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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...
Thursday, November 23, 2006

P0340 code for 1997 Toyota Camry with 2.2 L engine

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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...
Wednesday, November 22, 2006

BCM (body control module) Testing Summary

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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...
Monday, November 20, 2006

P0303 code for 1998 Ford Taurus with 3.0L engine.

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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...
Saturday, November 18, 2006

1997 FORD F150 P0401 EGR Flow code with 5.9L engine

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Question: As per your ATS instruction manual, I changed the egr valve, dpfe sensor, egr solenoid including the blowing of air passages of th...
Thursday, November 16, 2006

1997 Intrepid wiper motor won't stop even with key off: No codes

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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...
Wednesday, November 15, 2006

2000 Grand Prix with 3.8L engine intermittently quits after driving for 5 miles: No codes

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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...

2000 Grand Prix with 3.8L engine intermittently quits after driving for 5 miles: No codes

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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...
Tuesday, November 14, 2006

1996 Ford Taurus ps pump shooting oil as soon as the car is started: No codes

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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...
Monday, November 13, 2006

Code 44 on 94 GM Safari with 4.3L VORTEC engine

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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...
Thursday, November 09, 2006

1994 Ford Ranger Engine surges when AC defogger is tuned on: No Codes

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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...
Monday, November 06, 2006

Code 35 erratic engine idle for 1993 Pontiac Grand Am with 2.3L engine

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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...
Sunday, November 05, 2006

1993 Cavalier 2.2L stalls at stop lights but will re-start in 15 minutes: No codes

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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 ...
Wednesday, November 01, 2006

P0506 IAC code on Ford F150 with 4.6L engine.

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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...
Tuesday, October 31, 2006

Intermittent NO start and no scanner communication for 2002 Chevy Blazer 4.3L with no engine codes

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Question: What can cause my scanner not to communicate with my engine computer during no start. When this intermittent no start happens, the...
Monday, October 30, 2006

Windshield washer keeps freezing on 2002 Ford WindStar: No engine codes

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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...
Sunday, October 29, 2006

P1695 no communication code for 1997 Dodge Caravan with 3.3L engine.

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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...

P1695 no communication for 1997 Dodge Caravan with 3.3L engine.

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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...

P1695 no communication for 1997 Dodge Caravan with 3.3L engine.

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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...

P1695 no communication code for 1997 Dodge Caravan with 3.3L engine.

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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...

P1695 no communication code for 1997 Dodge Caravan with 3.3L engine.

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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...

P1695 no communication code for 1997 Dodge Caravan with 3.3L engine.

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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...
Wednesday, October 25, 2006

P0121 tps sensor code for 2001 Ford Focus with 2.0L engine.

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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...
Tuesday, October 24, 2006

P0340 camshaft sensor code for 1996 Ford Taurus with 3.8L engine

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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...
Monday, October 23, 2006

Dash panel lights are coming on and off while driving for 2000 Grand Voyager: No codes

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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...
Thursday, October 19, 2006

Engine no start with check engine light for 2002 GM Silverado with 5.3L engine

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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...
Wednesday, October 18, 2006

Using wiring diagram to fix the check engine light codes in your dash panel

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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...
Tuesday, October 17, 2006

P0121 TPS sensor code for 1997 Honda Accord with 2.2L engine

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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...
Monday, October 16, 2006

P0121 and P0112 codes for 1999 Chrysler Sebring with 2.5L engine

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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 ...
Sunday, October 15, 2006

No Start problem for 2000 Ford WindStar with 3.8L engine: No Codes

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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...
Saturday, October 14, 2006

P0441 Emission Code for 1999 Toyota Camry with 2.2L engine

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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...
Friday, October 13, 2006

Starter not working intermittently for 1998 Toyota 4Runner: No codes

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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 ...
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Thursday, October 12, 2006

Alternator won't charge for 1999 Chevy Camaro with 3.8 L engine: No engine codes

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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 ...
Wednesday, October 11, 2006

P0171 and P0174 lean mixture codes for 1999 Ford WindStar with 3.8L engine

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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 ...
Tuesday, October 10, 2006

Wiper Motor works intermittently on 1999 Chevy Pick Up Truck: No engine codes

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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...
Monday, October 09, 2006

Engine no start for 1994 VW Golf with 1.8L engine: No engine code

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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...
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