Automotive Technicians Technical Discussion and Fixes for Jun 9, 2015

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	Help Request	Answers
	2009 Acura RDX 2.3L A/C control We have this vehicle that the A/C controls do not respond we trace the problem back to the A/C module and found out the commanded data from the module get lost and do not reach the A/c controls checking on the wiring diagram we notice there are tree joint poin...	View
	2003 Audi A4 Quattro 3.0L Fan VIN: WAULT68E03 Radiator fan comes on after car shut off a while and continues to run until battery dies.info in alldata not helpfull,coolant temps look ok red/white control wires to fan control unit have have battery voltage when this happens-looks like straight from motroni...	View
	2007 Audi A4 Quattro Avant 2.0L Cam Sensor VIN: WAUKF78E57 We did do a timing belt on this car about 2k miles ago. Its back with a check engine light on, runing great. Have codes: -00017(p0011)-camshaft advanced, specification not met -01672(p0688)-main relay, load circuit -j271 open circuit -05668(p1624)-requirement-...	View
	2004 BMW X5 4.4i 4.4L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 5UXFB53594 Hey, I am not sure where to go from this point. This X5 surges and runs badly when started cold for about 30 seconds. When the O2s come online the vehicle runs fine. The additive lambda for cyl. 1-4 is 1.45 which I understand is lean. Makes me think vacuum lea... Trouble codes: 274E, 2748 (cyl 7 misfire), 2749 (cyl 2 misfire), 2747 (cyl 3 misfire)	View
	2006 BMW 550i 4.8L Cooling Systems VIN: WBANB53566 Hey guys.This car was towed in because the plastic portion of the upper hose exploded. Replaced radiator , thermostat , and hoses. Now it keeps boiling over through reservoir vent. Filled following procedure , high heat , low fan. Found auxiliary pump runs whi...	View
	2007 BMW 328i 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: WBAVA37587 When car first came it had many missfire codes, 2a87 exhaust vanos mechanic invalid signal, 10819 valvetronic thermal overload protection warning checked with cam vanos timing = intake 84.4--actual exhaust -115. Intake and exhaust adaption = -.41. Eccentric sh... Trouble codes: 29D2, 29D0	View
	2004 Cadillac CTS 3.6L power loss intermitt VIN: 1G6DM57774 This car experiences intermittent power loss while driving. All codes are history and they do not reset with symptom occurence. I notice while driving and problem present the TP indicated angle drops to 20-30% even though APP shows 100% and pedal is floored. T... Trouble codes: P1793 (wheel speed issue), C0870 (device voltage), U1000 (class 2 comm), U1016 (lost comm with ECM)	View
	1992 Chevrolet Corvette 5.7L Hesitation, Cuts out, Misfire, pinging VIN: 1G1YY23P4N Came in with a bad (dead, non-op) ignition control module and an intermittent runnning out of power climbing long hills complaint. Replaced the ICM and went on an extensive road test where I got the vehicle to act up. It would buck, jerk and ping. It would som...	View
	2001 Chevrolet Express 3500 8.1L MIL Lamp on VIN: 1GBJG31G51 this is a church bus,that came in for a service engine light on and lost of power.it set 2 codes,p1120 and p1638.well I have seen this b4,in the past I found the throttle body and the wire harness to be the problem and it would fix the problem.Well on this one... Trouble codes: P1120, P1638	View
	2009 Chevrolet Suburban 1500 LT 5.3L Starting VIN: 1GNFK26339 Customer says intermittently when he attempts to start the vehicle the starter clicks multiple times and then he loses all battery power, dash lights everything shuts down. I scanned it 1 code po513 theft key not recognized. It has newer battery which tests go...	View
	2009 Chevrolet Silverado 1500 WT 4.8L Poor Idle Quality, Cuts out, Stall VIN: 3GCEK13C19 Hello to all. I have this Silverado kicking me hard. It got towed in with a reduced power light and stall complaint. Started right up at the shop on the tow truck. Had service engine soon light on, pulled codes found P0641 5 volt reference 1 circuit problem. C... Trouble codes: P0641 (5 Volt reference 1 circuit)	View
	1997 Chrysler Sebring JXi 2.5L Stall VIN: 3C3EL55H9V Strange situation on this car that causes a start and stall after a couple seconds. Very intermittent. Owner says it coincides with interior lights. He says if the interior lights don't come on when they should, the car will do the start/stall. My shop and a f...	View
	2001 Dodge Intrepid SE 2.7L Tank Noise VIN: 2B3HD46R81 Greetings Techs. This 01 Intrepid was in for routine brake work when the customer mentioned that sometimes she could her a thumping or muffled popping noise at times near the rear of the vehicle. Sometimes the noise would persist for several seconds even with ...	View
	2008 Ford F-150 XLT 4.6L Head VIN: 1FTRW12W98 Hello all, I have a 2008 4.6 F150 brought to me for rough run and ck engine light on. code was P0305 and P115E (i am replacing the actuator for the P115E. how ever my issue is the after pulling coil pack #5, there seemed to be a little oil in the spark plug re...	View
	2010 Ford F-250 Super Duty King Ranch 5.4L drags in reverse VIN: 1FTSW2A54A upon test drive found in reverse truck makes noise like something is dragging it sounded like parking brakes pulled wheels and rotors and checked all look good. brakes are brand new front and rear all mororcraft severe duty. I can rotate the drive tires forwar...	View
	2008 GMC Envoy Denali 5.3L No communication VIN: 1GKET63M08 No communication with ebcm after attempting to re flash the module. In addition we don't have communication with ebcm and tcm. Car does run I did notice that tcm/ebcm use high speed Lan communication as well as class 2 communication not sure how it communicate... Trouble codes: U1000 (No communication)	View
	2005 Honda Accord EX 2.4L Unknown VIN: 1HGCM56845 Vehicle has rattling noise at idle only in gear, or in park with heavy loads turned on. Sounds like a diesel rattling. As soon as you come off idle it goes away. If you are in park with heavy electrical load and unplug alternator the noise goes away. With belt...	View
	2009 Honda Civic LX 1.8L abs VIN: 2HGFG12649 Have a 2009 civic without VSA in the shop with ABS activation during normal braking. When brakes are applied can intermittently hear and feel pump motor running, even under extremely light braking conditions on smooth roads. Can verify this by observing pump m...	View
	2009 Honda Civic Hybrid 1.3L Condensor? VIN: JHMFA36229 Car does not cool hardy at all going down the road. Vent temp is 65 or 70 with it 75 degrees outside. Passenger vent is 5 or 10 degrees cooler than the center or drivers side vents. at idle it cools a little better and if you speed it up just to 1000 rpm or 11...	View
	2009 Honda Fit 1.5L interior VIN: JHMGE885X9 intermittantly there is a gas smell in the interior of the car only when the engine is running. checked all fuel and vapor lines, injectors, gas tank and found no leaks. smoke tested the fuel tank and evap system and there are no leaks. its a very strong gas s...	View
	2009 Honda Accord LX 2.4L air bag VIN: 1HGCP25379 cust came in with this Honda from dealer said they couldn't scan it and sure enough my two scanners wont read it either I checked all fuses but neither one of my scanners will read the srs system do I need a special scanner to check this job out can anyone put...	View
	2000 Jeep Cherokee Sport 4.0L Keyless Entry VIN: 1J4FF48S1Y This Jeep came in to have the new key FOBs that we purchased through the Jeep dealer programmed. When I connect up our DRB3, I go to DRB Standalone/Theft alarm/VTSS/ (I wanted to select "Miscellanous/Program RKE", but it cannot communicate with the VTSS (I al...	View
	2005 Jeep Grand Cherokee Laredo 4.7L MIL Lamp on VIN: 1J4HR48N25 Hello IATN members, I have the pleasure of diagnosing a 2005 Jeep Grand Cherokee with EVAP issues. This Jeep is a Government vehicle. Check engine lamp on with these codes P0456 small leak detected, and P0457 gas cap loose. Check gas cap message on cluster. Ho... Trouble codes: P0456 (EVAP system-small leak detected), P0457 (EVAP system-loose gas cap), P0440 (EVAP system-General failure), P0499 (EVAP system-NVLD solenoid circuit voltage high)	View
	2003 Kia Rio 1.6L Charging VIN: KNADC125X3 I have what I thought was a simple charging problem turn into a head scratcher. I have 12v at the B+ at the alternator. I have 2.8v at the white/red wire KOEO and 12v KOER at the regulator plug. 12v at the green/white wire KOEO and KOER.Voltage drop of .01v fr...	View
	1997 Mercedes-Benz C230 2.3L speed sensors VIN: WDBHA23E7V Hi All, Vehicle came to shop on the hook, would not shift out of first and had the codes described above. Tech checked for leakage at valve body connector, and of course there was leakage, he installed a new conductor plate and connector, there was no fluid wi...	View
	1977 Nissan 280Z 2.8L Hesitation, very lean/ backfires VIN: HLS3037043 Hey guys, working my way thru poor corroded connections everywhere. Running very lean/backfiring thru the intake. I've got one question, basically. Being a California car it's got an altitude switch and I can't find it with the info I have. Anyone tell me wher...	View
	2007 Nissan 350Z Touring 3.5L MIL Lamp on VIN: JN1BZ34D27 This vehicle came in with a P2A00. It had an aftermarket induction system. I replaced the passenger's upstream oxygen sensor, later also the driver's side. Had to customer to put back the stock air filter system. After a week, the code came back. I smoked the... Trouble codes: P2A00	View
	2005 Subaru Outback i 2.5L Cuts out VIN: 4S4BP61C45 This is not a help request but information on this code that i found while searching for the problem. The problem with this car has been since the car was new. It had been to the dealer since it was new for this problem. The dealer had told him that it was a f... Trouble codes: P0102 (Mass air flow sensor)	View
	1999 Toyota 4Runner SR5 3.4L failed smog hi co VIN: JT3HN86R5X Hello and thank in advance for helping. We have 1999 3.4 at cali 4runner, failed smog, high co 1.48, high hc 58ppm, nox good. the c0 creeps up as we run it on the dyno, starts at .2 or less then creeps up to 1.5. we cleaned a dirty maf and even tried a new one...	View
	2004 Toyota Prius 1.5L Surge, Misfire, noise VIN: JTDKB20U24 This week it was brought to us with a complaint of lack of power and rattle while under load. Number one plug was ash fouled and center electrode porcelain was cracked again. We replaced all four plugs again and all misfires are gone. However, there is a very ...	View
	2010 Volvo XC60 3.2 3.2L THIS IS A XC90! Oil Filter Housing VIN: YV4982CZ9A THIS IS A XC90 ENTERING THE VIN PUTS IT UP AS A XC60? I DON'T KNOW WHY? In changing the Engine Oil Filter when I pull the cartridge cap off the filter housing the filter pulls in half which doesn't surprise nor alarm me as the filter housing looks clean insi...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2003 BMW 530i 3.0L main relay VIN: WBADT63463 I think I got this one fixed. I found that tech had crossed up connectors on purge valve and oil pressure switch. I combed wiring diag.over and over and finally decided to check purge and found it had only 1 wire in connector that set off the light bulb. Swapp...	11
	1998 Chevrolet Corvette 5.7L wipers VIN: 1G1YY22G0W Thanks to Sean and Mike! Easy but clear directions will do it every time!! reset motor bellcrank per replies, works perfect	11
	2000 Chevrolet Tahoe 5.3L repeat compressor failure VIN: 1GNEC13T5Y Will summarize for now and later add a close note with long term performance. Thanks to all that replied. I've also been in communication with Four Season's Help Desk Support/Engineering. Their theory is that the air sept suction and also the ac delco ...	13
	2005 Chevrolet Avalanche 1500 LS 5.3L reduce power mode VIN: 3GNEC12Z05 A simple test on the 5v. reference reveal that I had broken wires near the fire wall like a lot of you suggested thanks guys I needed your guidance because I was starting to get frustrated with this.it's fixed Trouble codes: P1125, P1120.	10
	2001 Chrysler PT Cruiser 2.4L MIL Lamp on VIN: 3C8FY4BB51 Thanks for the replies, ended up finding if I left the vehicle alone for over four hours the buss voltage out of the RME Module would be about 8 to 9 volts, not sure why but had an internal RKE Fault, all functions worked but it over powered the buss and shut ... Trouble codes: P1686 (Loss of SKIM BUS), P1687 (Loss of insturment cluster buss).	7
	2003 Chrysler PT Cruiser GT 2.4L cooling fan INOP VIN: 3C8FY78G83 Well it turned out to be the cooling fan. I tried another new aftermarket fan and still had no fan operation, but the DTC P0688 did not return. I had to get a OEM fan to correct the problem. The only thing I could figure out was the first new fan was pulling d... Trouble codes: P0688 (ASD Relay Sense Voltage).	24
	2006 Chrysler 300 Limited 3.5L Engine VIN: 2C3LA53G66 Thank you for the responses, yes it is engine time. It seemed obvious from the start but wanted to make sure there wasn't another common chrysler issue like broken flexplate. To confirm I removed the trans inspection plate, no obvious issue found in there. Dr...	17
	2001 Ford F-150 King Ranch 5.4L Dash Lights VIN: 1FTRW08L71 After painstakingly disconnecting, reconnecting almost every circuits from under dash, under hood, under car, fuse boxes, with very odd and sometimes mixed results leading me to the same problem in the end. Wasting a lot of time following related wiring schema...	9
	2001 Ford F-150 Lariat 5.4L Tcase VIN: 2FTRX08L61 Hey guys, Thanks for all of the help. The noise was the front bearing in the transfer case. The oil pump rotor had snapped. causing a lack of lube/dry noise. replaced transfer case, now all good! Thanks again.	7
	2005 Ford Escape Limited 3.0L Poor Idle Quality I rechecked for vacuum leaks with smoke machine and propane. No vacuum leaks found. Next step would be compression test and valvetrain inspection. Local mazda tech told me he has seen broken valve springs cause this symptom. Customer took vehicle and is curren...	15
	2004 Jaguar S-Type 3.0L Monitors VIN: SAJEA01T74 After driving this vehicle for 2 weeks without the evap monitor going to complete and no codes, this state has allowed the vehicle to pass without the evap monitor complete.	5
	2007 Jaguar XJR 4.2L MIL Lamp on, VIN: SAJWA73C87 Customer has picked up the car and so far hat returned to reflash the computers. I will add info when he returns Trouble codes: P1797.	6
	1993 Jeep Grand Cherokee Laredo 4.0L No Start VIN: 1J4GZ7853P Thanks to all who gave me advice. I should have known that when dealing with 90's Jeeps, that electrical connections are always the first place to look. I pulled the plug out of the PCM, sprayed it, wire brushed the connections and used my micro-file to clean ...	9
	2006 Pontiac Grand Prix 3.8L No Start, Cuts out, MIL Lamp on VIN: 2G2WP55276 Let me thank all for your input, including those that chose to flame me for not being professional and shot-gunning parts (especially Robert fro Texas). When all your testing is going no where, sometimes you have to draw on your experience and replace things t...	24
	2006 Toyota Sequoia Limited 4.7L timing belt VIN: 5TDZT38AX6 Thanks for your help. The opinions were about half one way half the other way. In the end i decided to advance the timing 50 degrees & do the belt there. No cams spun when the belt was removed. Also the marks on the belt really helped out.	13

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