Automotive Technicians Technical Discussion and Fixes for Sep 17, 2014

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	Help Request	Answers
	2007 Audi Q7 Premium 3.6L shifter VIN: WA1BY74L27 Truck towed in, key turns, no crank. Message - shift to park. It is in park, shifter does not release from P except by override. Engine ECU - no communication with Trans Module. ABS also no comm.w. transmission. Tranny module can not be read. Fuse 8 in RH brow...	View
	2007 Audi Q7 3.6L Poor Idle Quality, Misfire, MIL Lamp on Hi there guys, writing this one up before i go home. This 07 Audi Q7 came in after the above mentioned repairs already performed but according to the customer everything is as it was. Same DTC's & driveability concerns. I went as far as doing a visual inspecti... Trouble codes: P0087 (Fuel Rail/System Pressure Too Low Lower Limit Reached), P0087 (Fuel Rail/System Pressure Too Low Lower Limit Reached), P0300 (Random misfire), P0305 (Cyl 5), P0304 (Cyl 4), P0420 (Catalyst System Bank 1 2 P0430)	View
	2001 BMW 740iL 4.4L turn signals VIN: WBAGH83431 Help BMW techs! this car had sat for about 2 1/2 years unused needing a transmission. We replaced the trans- when customer came to pick up the car the turn signals were inop- I did a quick check of fuses in the lot- all ok. This appears to be something that o...	View
	2009 BMW X6 xDrive35i 3.0L waterpump VIN: 5UXFG43509 We are replacing the waterpump, & can't get it out of the space. All Alldata says is to partially loosen the sway bar. We have both brackets out, & both ends disconnected. Just cannot work it out through there. Is there another way to get it out? It is su...	View
	1989 Buick LeSabre Custom 3.8L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G4HP54C9K vehicle will run and idle fine when cold once it gets to temp it will start to run rough almost like a very bad skip runs very rich from tail pipe but ecm data shows the o2 to be switching. grounded the ets at ignition module while running to see if it would c...	View
	1995 Chevrolet K1500 5.7L Idle VIN: 2GCEK19K1S Car drives fine on freeway...once off freeway it surges and dies. Also surges and dies at idle. Runs rich,dumping gas. O2 sensor switching ok. No codes.	View
	2000 Chevrolet Camaro Z28 5.7L Axle Seal VIN: 2G1FP32G7Y we have replaced the right side axle seal two time in the pass for a leak after the rebuild about 1 year ago now back for the same problem leaking on the right side axle any help would be nice thanks	View
	2001 Chevrolet Silverado 3500 6.6L Hesitation, Cuts out VIN: 1GCJK39111 Help! this truck is driving me nuts. About a year ago, it was doing the same thing it is now, but for a different reason. It was throwing codes for low fuel rail pressure and going into limp more, usually in hotter weather and pulling uphill with loads. After ...	View
	2006 Chevrolet Corvette 6.0L Clutch VIN: 1G1YY26U86 has anyone had any experience with this problem on this type of vehicle. Any thoughts on where to start to find problem?	View
	1999 Dodge Durango SLT 5.2L Poor Idle Quality, Hesitation, Surge, Cuts out VIN: 1B4HS28Y8X Engine runs fine when started cold and in cooler ambient temperatures (below about 75 or 80 degrees F). Symptoms start once run in warmer weather. Starts by surging and cutting out on moderate acceleration, when it surges the engine pings briefly (about a seco... Trouble codes: P0622 (Generator Field Not Switching Properly), P1391 (Intermittent Loss of CMP or CKP), P0132 (1/1 O2 Sensor Shorted to Voltage), P0113 (Intake Air Temperature Sensor Voltage High), P0340 (No Cam Signal At PCM), P0320 (No Crank Ref Signal at PCM)	View
	1997 Ford F-150 XL 4.2L engine VIN: 1FTDF0720V Thank for the time to read my telchhelp request, we replaced the engine block and now the engine have high idle P1506 code IAC Valve is reading 13% duty cycle at 1120 RPM when the engine star up the IAC duty cycle is 50% and them drop to 13%. (VALVE IS NOT ADJ...	View
	2002 Ford F-250 Super Duty XLT 7.3L No Start VIN: 1FTNX21EX2 Well here we go. I have a 2002 Ford F250 7.3L diesel here at the shop with 233k on the odometer. At fist the truck had issues running rough at start up every once in a while, then sometimes it would start running rough under load to the point where it was un-d... Trouble codes: P1212 (ICP Voltage not at expected level)	View
	2005 Ford F-350 Super Duty King Ranch 6.0L No Start, Stall VIN: 1FTWW31P45 vehicle came in for a no start condition, customer stated that he scanned with generic scanner and found a cmp code so he replaced, I scanned and found no eop reading and ipr low, found eop harness broken , replace sensor and pigtail, removed ipr to find scree...	View
	2006 Ford F-350 Super Duty XLT 6.0L MIL Lamp on VIN: 1FTWW31P06 Thanks in advance for all your help. This truck came in for the MIL being on. No other complaints. I found the code P0401. I checked for loose connections and other obvious wiring problems. None were found. I activated the EGR with my scanner and it appeared t... Trouble codes: P0401 (Insufficient EGR flow detected), P0528 (Cooling Fan speed sensor no signal)	View
	2010 Ford Transit Connect XLT 2.0L Light on Need some help with this one guys. Tire pressure light flashes for a little over a minute and then stays on. Triggered all 4 sensors and they are fine. Entered relearn for sensors, horn chirps to confirm that it is in relearn. Then nothing happens when I trigg...	View
	2010 GMC Terrain SLT 2.4L Poor Idle Quality, Surge VIN: 2CTALFEW7A thanks for the help, this gmc terrain 2.4 has a high extended idle. it will idle down after 15-20 seconds. at park, if you goose it the idle goes to 2500-3000 rpms and slowly goes to normal idle. when you drive the car it will surge on deceleration to a stop.(...	View
	1999 Honda CR-V EX 2.0L valve VIN: JHLRD176XX Personal vehicle (now). Problem child Honda CRV has had 4 head replacements/rebuilds in six years at 3 different shops in Durango. Typically presents with P0300/P030X with recessed exhaust valve within 12 months of head replacement. Vehicle gets superb mileage...	View
	2012 Honda CR-V EX-L 2.4L Timing chain VIN: JHLRM4H78C Car has a timing chain rattle for a few seconds at cold start up or when car sits for any longer than a half hour. Assumed the timing chain tensioner went bad and replaced it. No change. Removed timing cover and found everything intact with no guide or chain d...	View
	2003 Hyundai Accent GL 1.6L No Start, Cuts out, Stall good morning, this car will cut out while driving. it will start after sitting about 15 min. it will continue to run approx. five min an then stall again. it has a no spark condition but has fuel pump activity. When it sits over night you can start it and it ...	View
	2005 Jaguar S-Type 3.0L MIL Lamp on VIN: SAJWA01TX5 after replacing MAF with an oem part customer returned in about a month with the same code and other evap codes which customer declined to repair them at the time. would evap code cause p0101 to return. LT FT readings are well within +/- 5%. any ideas would re... Trouble codes: P0101, P0452, P0456	View
	2006 Lexus GS300 3.0L Srs VIN: JTHCH96S86 This Lexus keeps setting a B1801 and B1811 "driver's side squib circuit open". If the DTC's are cleared they return in just a few seconds. I have checked the circuit from the SRS sensor assembly connector through harness and squib, even while turning the steer...	View
	2006 Mazda 6 i 2.3L cam advance VIN: 1YVHP84C36 installed new head and chain setup. aligned everything with AST tools , checked twice. can hear rattle from can actuator from no oil pressure (guessing) cel comes on with p0012, activated oil control valve at idle and no engine change. I seen posts that it sho...	View
	2006 Mazda 6 i 2.3L MIL Lamp on VIN: 1YVHP84C36 everyone, hoping someone can shed some light. installed reman head and chain. set with cam and crank timing with AST tools and checked twice, after driving sets a p0012. can hear a rattle at 3000 rpm. leaving the car idling , i actuated the oil control valve ... Trouble codes: P0012	View
	1973 Mercedes-Benz 220D 2.2L No Start VIN: 1151101035 Hello all, looking for some help on this Mercedes diesel. The customer replaced the injection pump and did not time the pump. The vehicle does start but runs very poor. I know the pump is out of time and I am having a hard time timing the pump. I have read the...	View
	2003 Mercedes-Benz CLK320 3.2L convertable top VIN: WDBLK65G23 This clk is a nightmare and need it to go away. The original complaint from used car lot was windows, blower, for/aft not working on seats and radio inop. Scanned and diagnosed lower control panel module incorrect for car. radio also used and buttons did not ...	View
	2004 Mercedes-Benz ML500 5.0L Unable to refuel VIN: 4JGAB75E94 This Ml500 came to us unable to put fuel in the tank. We found the charcoal canister (part of the tank) was clogged due to fuel intrusion. Customer admitted to over filling several times. We were unable to get a new tank as they are on backorder. Reluctantly i...	View
	1997 Nissan Pathfinder LE 3.3L low brake peddle VIN: JN8AR05Y3V hey guys thanks in advance this vehicle has been in every shop in town I hate being last resort hotel but that's how it goes another shop replaced the rear brake lines and the peddle will go down about half way on the first hit and feel perfect the second hit ...	View
	2002 Oldsmobile Bravada 4.2L Stall VIN: 1GHDT13S22 customer had this towed in for no start.said it had acted up a couple times before.it starts right up normaly every time you turn key,stalls in about three or four seconds.checked fuel ok, can keep running on carb spray. no codes any module,all communicate wit...	View
	1989 Pontiac 6000 LE 2.8L Power bog VIN: 1G2AF51W5K This car runs very slightly rich at idle, but is smooth and has no hesitation or other apparent problem with moderate acceleration at rest. When driving, with 3/4 or more throttle, car bogs down, and exhaust becomes black/rich. Catalytic converter starts to ov...	View
	1996 Porsche 911 Carrera 3.6L top VIN: WP0CA2995T this porsche came in with the convertible top inoperative we installed new drive cables and a new control module here is the problem to open the locks you activate the switch to the down position the locks release and then you must lift the top off the f...	View
	2008 Toyota Tacoma Pre Runner 4.0L battery VIN: 5TEJU62N18 Very well maintained Taco with no aftermarket stuff added. Original complaint was bearing noise from engine pulley area. Tested and replaced alternator with reman Denso unit. Vehicle returned after a little over a month with a very intermittent dead battery af...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2009 Audi A4 Quattro 2.0L MIL Lamp on VIN: WAULF78K49 The car has been gone two weeks: fixed! Two sets of codes were present. There was a code (read with the VCDS) for a fuel pressure malfunction. This did not make the check engine light come on, but could be the cause of the other codes. For this reason it w... Trouble codes: P2187 (System too lean at idle).	7
	2006 BMW 325i 3.0L no power to compressor VIN: WBAVB13596 We located some relays behind the glove box but none of them are A/C relay. Mitchell information is completely unreliable by showing a picture of an A/C relay behind the glove box. On the other hand, Mitchell wiring diagram does not even show an A/C relay, it...	5
	1999 Buick Regal LS 3.8L HVAC ATC control VIN: 2G4WB52K7X Thanks so much for the overwhelming response - Ignition switch fixed it. A fly in the ointment - aftermarket remote start / alarm wireing soldered into the ignition switch harness - thought perhaps that was causing problems - did not. Thanks to Steven, Joe,...	13
	2003 Cadillac Escalade 6.0L rear air shocks VIN: 1GYEK63N83 Wow! Thanks for the great responses! Lots of sources given. Customer went with the cheapest one! [Surprise, surprise] Customer is happy & I made a little money.	28
	1982 Chevrolet Corvette 5.7L CD player Thanx to all that replied I mentioned to the customer it may be in the distributor and like any other customer they rather throw parts at a car then pay a diagnostic fee he put in a new distributor and that fixed it and by the way the old distributor had a "ki...	11
	2001 Chevrolet Malibu LS 3.1L No injector pulse VIN: 1G1NE52J01 Thanks for all the advice. Tim was correct, this car has PassLock, not PassKey 2. AllData contradicts itself, depending on what section you are in. A relearn [took 4 tries before it stayed] fixed it.	8
	2003 Chevrolet Avalanche 1500 5.3L no start,no charge VIN: 3GNEC13TX3 Happy to report that cleaning the throttle body fixed this vehicle.I look forward to seeing many more of these TAC equipped trucks with this condition, easily solved with one labor hour and shop supplies.Win-win for customer and I,and I believe it will be comm...	6
	2006 Chevrolet Silverado 2500 HD LT 6.0L MIL Lamp on VIN: 1GCHK23U56 A MOUSE CHEWED THE GROUND WIRE BEHIND ENGINE ON PASS SIDE.THANKS FOR ALL HELP Trouble codes: U0107.	7
	2010 Chrysler Town & Country LX 3.3L No Start VIN: 2A4RR4DE8A Finally have an exlaination for vehicle. As said vehicle sat before being towed to us. while sitting and not know to customer vehicle was struck by lightning which fried a majority of modules. What I learned is when you cannot explain why you have lost communi... Trouble codes: U0121 (Lost communication with antilock brake module), U0100 (Lost communication with ecm/pcm), U1197 (Security seed response not recieved from ecm/pcm), U0141 (Lost communication with instrument panel moduleipmfront control module fcm/tipm).	8
	2006 Ford E-350 Super Duty 6.0L No Start VIN: 1FTSE34P46 after retesting the high oil pressure system found i IRP sensor sorted and would not close thanks for all the help	13
	2007 Ford Escape XLT 3.0L 1-2 VIN: 1FMYU93197 We finally found a corroded/ broken wiring. Looks like someone had probed it before and did not seal it back up. Thanks for all the help.	5
	2005 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK23205 Have checked all that we can here. Sublet to my duramax friend at chevy garage. Do have plenty of pressure. Have checked all that I can with scan tools and electrical test. Decided it would be less expensive to farm out than pay employee and myself for lost ho... Trouble codes: P0089, P1093 (Fuel rail pressue low under load.).	6
	2007 GMC Acadia SLE 3.6L plastic pressure pads VIN: 1GKER13797 Were able to replace the pads. Codes did not return. Vehicle was delivered. Customer satisfied.	2
	2008 Honda Civic Si 2.0L MIL Lamp on VIN: 2HGFG21538 I had suspected a wiring issue since so many systems were affected and the help provided was spot on saving me a lot of time. Wiring for sensor ground was indeed open at PCM, repaired open, problems solved. Many thanks! Trouble codes: P0123 (Tps), P0223 (Tps).	1
	2009 Hyundai Genesis 3.8 3.8L brake lamps inop VIN: KMHGC46E99 Okay group, here's another one where we can learn from. The stop lamp switch has two functions. To turn on the stoplights; that happens through the gray wire. That gray wire then goes through a diode to a joint connector and then splits off to the three brake ...	9
	1997 Jaguar XK8 4.0L shift interlock VIN: SAJGX2748V The customer opted out of spending money for diagnostic time. glad to see the car leave but not glad.I had a lot of time in this thing.They couldn't understand why we cant just put it on the computer and tell them whats wrong.I would have loved to find the pro...	4
	2002 Jeep Grand Cherokee Laredo 4.0L electrical system VIN: 1J4GX48S22 Well I think you all will get a good laugh out of this one I did. Long story short I missed a ground wire when I installed the new battery cable assembly. It got moved out of the way and because of it sitting over the weekend I forgot to hook it back up cause ...	7
	2007 Jeep Grand Cherokee Laredo 3.7L Misfire VIN: 1J8GR48KX7 After carefully scoping everything, I did find that the bank one sensor one oxygen sensor was going haywire on a cold start. I don't know how I missed it. But it was so intermittent. I replaced the oxygen sensor and so far no more misfires. I'm closing because... Trouble codes: P0300 (Random misfire).	3
	2006 Mazda 6 i 2.3L No Start VIN: 1YVHP84C36 everyone - sorry for the late response. looks like the ecm turns off injectors and coils when out of time. ended up with a jumped chain and all exhaust valves bent. put on an new head and runs fine but still have a check engine light for cam advance. will sub... Trouble codes: P0335.	4
	2003 Mercedes-Benz CLK320 3.2L warning light VIN: WDBLK65G73 After many hours of watching switch data and confirming everything looked normal I continued to replace the power top control module. After installing the module all issues were gone. The power top continues to operate normally.	1
	2010 Mercedes-Benz Sprinter 2500 3.0L Hesitation VIN: WDZPE8CC7A Our final diagnosis was a bad torque convertor, however, the customer did not want to spend any more and took the vehicle as is. Thanks for everyone's suggestions, we read them all and when we got the vehicle back yesterday (has not been in the shop since ori...	10
	2004 Pontiac Grand Prix GT2 3.8L Cooling Systems VIN: 2G2WS52264 This morning I re bled the system and then attached a coolant pressure tester to the radiator. Shortly after starting and before the temperature gauge went quarter scale the upper radiator hose became very rigid and the gauge climbed to 20 PSi and was continui...	26
	2009 Toyota Tacoma 4.0L abs VIN: 3TMMU52N09 RF wheel speed sensor replaced and all is well i had to use a lab scope to catch it thanks to all	11
	2005 Volvo XC70 2.5L 3-4 VIN: YV1SZ592X5 Thank you for your responses. I agree it was in the valve body. Lucky for me customer had an extended warranty that covered the transmission. Installed low millage lkq trans and all in right with the car again. thank you.	8

(Also Available: All, Asian, Chrysler, European, Ford, GM.)