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Prev Professional Automotive Repair Technical Discussions for April 15, 2014
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2001 Acura MDX Touring 3.5L MIL Lamp on VIN: 2HNYD18691
customer trying to pass smog, check engine light on, code for evap system. found bypass valve leaking, replaced both valves at evap canister. ran monitors and NOW we have a p0171 lean code, just as we were pulling it on the dyno, the light flipped on. long ter...
2007 Audi A6 3.2L Ignition VIN: WAUAH74F87
Hello Audi Techs, We had this car towed in to us with the rear wheels locked up. The car won't start and the dash lights won't light up and the battery is fine. We tried the second key thinking it might be the key, with no luck. We looked up IATN post and foun...
2006 BMW 330i 3.0L clock VIN: WBAVB33556
This is a first time customer who brought the car in to check for oil leaks.He also mentioned that the clock would not hold a time setting.I set the time and it seems as though every time you crank the engine is when it drops the time I experimented by hooking...
2006 BMW 325i 3.0L Headlights VIN: WBAVB13576
This BMW has the self leveling headlights, they are aiming too low, when I start the car they don't go through the self test movement, they stay aiming low, they are not at the bottom of the travel, I can control them with the scanner, but that's it. Thanks ...
2006 BMW X5 3.0i 3.0L key fob VIN: 5UXFA13506
I have a X 5 that the key fob will not work. I have three keys for vehicle. I have tried programming multiply times. I test all three keys and get a 315mhz signal from all button on all keys. However the vehicle is not seeing the signal. The power locks do wor...
2007 BMW 750Li 4.8L Misfire, MIL Lamp on VIN: WBAHN83587
hi fellow techs . This car came in with leaking valve cover gaskets and valtronics servo motor codes 2a6a both banks but reunning fine after we replace the valve cover gaskets the service engfine light came on with codes po011,po021 and po016 some times o018 w...
2008 BMW 535xi 3.0L Poor Idle Quality, Hesitation, MIL Lamp on VIN: WBANV93568
Put new spark plugs in cylinders #1,2,3 with no effect. I could not find a resistance spec for either the coils or the fuel injectors. Is there someting common to cyl#1,2,3 that I could be missing? Does anyone have any electrical specs for windings in coil ... Trouble codes: P0300 (Random misfire), P0301 (Cyl 1 misfire), P0302 (Cyl 2 misfire), P0303 (Cyl 3 misfire)
2006 Buick Rendezvous CXL 3.6L Cuts out, Stall, Forced Idle Mode VIN: 3G5DB03786
9-24-13 at 53,927 miles. Car was towed in while in forced idle mode. Tech found P0122, P2127, P2119, P2101 and P0626. He replaced TAC Assembly, APP Sensor and Alternator. 12-23-13 at 55,804 miles. Had P0102, P0122, P2101, P2119, P2122, P2127 and P2328. Tech r... Trouble codes: P2138 (App Sensor 1-2 Correlation), P2101 (TAC Position Performance), P0221 (TP Sensor 2 Performance), P0122 (TP Sensor Circuit Low Voltage), P0102 (MAF Sensor Circuit Low Voltage)
2002 Chevrolet Silverado 2500 HD LS 6.0L power steering pump VIN: 1GCHK23U12
Having problems with Power steering pump - noise - excessive whine 1200 RPM Plus. Slow to no steering while brake applied at idle. Remember vehicle modifications - over sized (37") tires and (6")lift. Slight aeration of fluid , used non synthetic fluid to refi...
2004 Chevrolet Venture LT 3.4L 3rd Gear VIN: 1GNDV13E24
Shop customer installed rebuilt trans and transfer case, and trans has no 3rd gear. We've isolated the problem to the valve body. Quite certain sticking valves from debris from their old tranny. Checking to see if anyone has replaced the valve body in one of t...
2006 Chevrolet Uplander LS 3.5L tcc VIN: 1GNDV23L06
Hi all, got a transmission problem with this uplander. The tcc duty cycle ramps up and up to about 80 percent then drops to 0 most of the time almost in perfect sawtooth pattern, changes a little with different throttle settings. Scoped out with maxisys lookin...
2011 Chevrolet Silverado 1500 LT 5.3L Trailer brake VIN: 1GCRKSE31B
Hi fellow Techs This truck was brought in with a "Service Trailer Brake System" warning on the dash. Looking under the vehicle I noticed a wire loom dragging on the ground (drivers side just under the rear seat). The customer travels on a mud/dirt road all the...
2007 Chrysler Town & Country 3.3L evap VIN: 1A4GJ45R57
This van has a gas cap light on, you can clear it & start the van & let it idle for 30 seconds & it comes back on, there are no codes & the ses light stays off. A friend of mine has a body shop & they put an evap canister on it, & replaced the gas cap with one...
2008 Dodge Avenger SXT 2.4L MIL Lamp on VIN: 1B3LC56K68
Chrysler Techs, We replaced the PCM in this vehicle with a new Chrysler part and used the part number from the PCM label to get the correct flash, the flash came out to be 2007 California with ABS. we flashed it ok. No it sets codes for U0101 no communication ... Trouble codes: U0101 (No communication from tcm)
2000 Ford F-150 Lightning 5.4L serpentine belts VIN: 2FTZF0736Y
Hi a customer came in this morning to do a general lookover of a 2000 ford lighting, i've never worked on one, so i was wondering how to remove the crankshaft pulley to the supercharger to replace drive belt, alldata has no information on how to do it. Any hel...
2001 Ford Expedition Eddie Bauer 5.4L air ride VIN: 1MFMU18L91
Vehicle came in with rear end sitting on bump stops. checked codes found C1830 found compressor relay corroded off. Replaced replay and connector with new aftermarket part. Still have compessor inop. Performed pinpoint test for code. Flow chart lead to check r...
2002 Ford F-350 Super Duty XL 7.3L Black Smoke VIN: 1FDWF36F62
Customers complaint is heavy black smoke under load. Vehicle is stock. Verified no aftermarket chip or programmer. Fuel pressure after pump is 65 psi. Fuel filter has been changed. There does not seem to be any loss of power. Under load I am seeing 14-15 psi o... Trouble codes: P0284 (Cylinder 8 contribution fault)
2006 Ford F-250 Super Duty XLT 5.4L Misfire VIN: 1FTSX21576
After I replaced the spark plugs {only 2 of them had to be extracted} the engine misfired and will not set any codes. I removed all the plugs to check if I had cracked any and all were good. I then began pulling the coil connectors off one at time to identify ...
2008 Ford Escape XLS 2.3L steering angle sensor VIN: 1FMCU02Z68
Vehicle came in with intermitent steering assist and code b2278-steering torque sensor. This vehicle has electric steering assist. Cleared codes and road test and lost assist and set code again. Installed dorman steering angle sensor and cleared codes and star...
2008 Ford F-350 Super Duty Lariat 6.4L down on power VIN: 1FTWW31R08
First off I'd like to say thank you to all who respond! This 6.4 diesel has a after market programmer and it is down on power customer claims it feels stock. I've checked for codes-none, the fuel pressure is tracking with desired fuel pressure (WOT 25,856.7 PS...
2007 GMC Envoy SLE 4.2L Compression VIN: 1GKDT13S37
This vehicle has no ticking, no backfire through the exhaust or the intake, live misfire readings on cylinder five are all over the place the other cylinders have small history of misfires. Use the borescope both both valves opening and closing and cylinder wa...
2008 Honda Pilot EX 3.5L Poor Idle Quality, MIL Lamp on VIN: 5FNYF28608
ok guys this honda is wearing me out . came in and would not start. died on the highway.after allowing it to cool it started and ran very rough. Engine light on,vsa light on.The way it ran i could tell exhaust was restricted. i removed the 3rd converter and gu... Trouble codes: P2647
1995 Isuzu NPR 3.9L No Start, Hard Start VIN: JALC4B1K8S
This NPR was sitting for about 2 years before we ended up with it. Did all the normal service work to get it road worthy again and the only problem we are left with is a cold start issue every morning. Can't seem to find a wiring diagram for the glow plug circ...
1997 Isuzu Rodeo LS 3.2L Alternator VIN: 4S2CM58V9V
Hi to all tech, I doing mobile diagnostic to a new garage repair this mechanic told me: the truck die when was running and the customer replace the battery them the alternator from auto parts them try from autozone, this is the 3rd alternator on it and is not ...
1999 Jeep Wrangler Sahara 4.0L Cuts out VIN: 1J4FY49S7X
One for you Iacocoa boys. Got this "99 Wrangler Sahara 4.0 standard transmission. Bucks hard on a hard acceleration. If you ease into the gas, smooth as silk. Keeps setting a P1391. I scoped the cam/crank signal with my pico. Cam/crank signal is in sync but cr... Trouble codes: P1391 (Intermittent loss of cam or crank)
1999 Lexus RX300 3.0L Misfire, MIL Lamp on VIN: JT6HF10UXX
I have seen mention of a screen for the control valve exactly where is it? I can't seem to find it. Will also be checking oil pressure in the morning to see if it drops way off warm. Spec is only 4.6 psi at idle. thanks for your help in advance. Trouble codes: P1349
2005 Mercedes-Benz E500 5.0L Marker Lights
Mercedes techs please help.i have no marker lights (the lights that are with the high beams,168 bulb 5 watt)i have turn signals.on the dash it says left front marker light out and right front marker light the drivers sam module it has a code for e1e3 li...
1998 Nissan Maxima GLE 3.0L No Start VIN: JN1CA21D7W
We have this 98 Nissan Maxima 3.0L with a no start condition.We have fuel pressure but only have spark on cylinders 3 and 6.We have tested everything we can think of.Tried both crank sensors,cam sensor and even had the computer rebuilt?We have cleaned up every...
1998 Pontiac Grand Am GT 3.1L Stall VIN: 1G2NW12M7W
This vehicle starts and stalls apon start up and the theft light will blink for about 10 to 30 seconds and then stay on solid. If you try to restart after the light is solid the vehicle will start and stall again with the theft light blinking again for the sam... Trouble codes: P1629 (Theft deterrent fuel signal not received)
2004 Subaru Legacy L 35th Anniversary 2.5L compressor VIN: 4S3BH625X4
I have this legacy with manual a/c control That I can't get the compressor to come on.Trace it to a/c relay is not getting ground signal from ecm. Check and replaced the control head and it worked for 1 day and then it is back to the same thing. i can not fine...
2001 Suzuki Vitara JX 2.0L Crankshaft VIN: 2S3TD52V31
Customer came in with oil leak at rear of engine. Looked into rear seal area with scope and seen oil leak at rear main seal area. Replaced seal. 5 minutes after start up leak still there. Torn back down thinking seal defected or something. Used smoke machine t...
1994 Toyota Camry LE 3.0L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 4T1GK12E4R
Car will always start cold. After a few minutes it will stall. It will start back up but run rough as hell under slight acceleration Be ok for a few minutes then start this running rough all over. When driving the car it sometimes quits and you have to sit the... Trouble codes: 1300
1995 Toyota Camry LE 2.2L engine VIN: JT2SK12E6S
Customer paid $5k year ago for this beauty. Original engine and trans (!) Just sunk a few more hundred on repairs with us. Comes back on the hook, rod spit out the side of the block.( Not lack of oil, rod cap is beat into a little ball of metal,not black, rod ...
2002 Toyota Avalon XL 3.0L MIL Lamp on VIN: 4T1BF28B02
On this vehicle the heaters for the air fuel ratio sensors (kind of like the old O2 sensors)will stop working. The power is getting to the PCM through the sensors and wiring and I can see the ground being applied and its levels will vary as it should. Then all... Trouble codes: P1135 (air fuel sensor heater circuit failure), P1155 (air fuel sensor heater circuit failure)
2013 Volkswagen Jetta TDI 2.0L Coding of J527 VIN: 1VWCN7A30D
Hi Everyone, I have the is 2013 Passat sedan from one of our local body shops the had front end damage, air bags were deployed. The body shop has completed most of the repairs, they have in stalled a new air bag module and a steering wheel electrics module J52...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
1995 Chevrolet K1500 Cheyenne 5.7L Electrical VIN: 1GCEK14K8S
Like to thank all 17 replies on my help request. This vehicle drove me nuts for 4 days. Almost all of you guys mentioned something about engine not properly grounded to body. I founded all grounds were connected where they suppose to. Went into all fuse block,...
2006 Chevrolet Express 3500 LS 6.0L No Start VIN: 1GBJG31U86
2007 Chrysler PT Cruiser Limited 2.4L Battery VIN: 3A4FY58B57
We have not fixed this vehicle yet. We let it sit for 2 weeks and had no problems battery still had sufficent charge. We rechecked all the lights and switches many time with no problems found. It does not have autostart or any other aftermarket accessories. Th...
2003 Ford F-350 Super Duty XL 6.0L Cuts out, Misfire VIN: 1FDWF37P23
I forgot to mention in my original post that I had already performed the balloon test. But what I ended up doing was swapping #2 and #4 injectors and the miss moved to #4 so I went ahead and ordered another new injector and the truck is running great. I would... Trouble codes: P0266.
2004 Ford F-150 FX4 5.4L intake manifold VIN: 1FTPW14554
first of all thanks to everyone who takes the time to help. Sam from new jersey had the right answer for my problem, the vent hose for the pcv system was connected to te vacuum suply for evap system and viceversa from previous shop. After those hoses was conne...
2005 Ford Explorer Eddie Bauer 4.6L battery goes dead VIN: 1FMZU74W05
Thanks to everyone who replied all were great suggestions I found the problem under the carpeting on the passenger side of vehicle. wiring was burnt up there looks like someone spilled soda down there and it corroded and burned.
2004 Honda Pilot EX 3.5L Battery Drain VIN: 2HKYF18574
2012 Hyundai Sonata GLS 2.4L MIL Lamp on VIN: 5NPEB4AC7C
We removed the valve cover and checked the timing. It was OK. The next step was to remove the head to check the screens, but the car lot decided to take it back unrepaired. Thanks for the help. Trouble codes: P0014 (Exhaust cam over advanced).
2013 Hyundai Sonata Limited 2.4L Poor Fuel Economy VIN: 5NPEC4AC6D
As usual, the story doesnt end there...yes ,wife also has a older, smaller model!! I gave the car back to the customer, explaining that I found no discernable reason for the poor mileage, adding that carrying less stuff around with himself could h...
2006 Jeep Commander 3.7L dash controls VIN: 1J8HG48K56
Thanks for the replies and sorry forgot to close repair. Never could find problem or get vehicle to exhibit symptoms again. As of today customer still has not experienced problem again. thanks again for the help. Ralph.
2005 Mazda Tribute S 3.0L Hesitation, Poor Fuel Economy VIN: 4F2CZ941X5
We replaced the fuel pump control module as the fuel pressure was fixed and not increasing for load or backing of for cruise conditions . drive ability is greatly improved but it still has a hesitation. extended cranking is also no longer an issue. Thanks f...
2004 Mercedes-Benz C240 2.6L cooling fans VIN: WDBRF81J04
Thanks again to all of the replies I received. We ended up finding that the engine computer was faulty. We were able to determine that the pcm was losing an internal ground, or signal that processed the signal from the fan module. We sent it to Beckman Technol...
2006 Mercury Grand Marquis LS 4.6L seatbelt light / low fuel light VIN: 2MEHM75V86
first of all I appreciate the replies I recieved. when I first started testing I had already cleaned battery & connections also grounds near battery. I decided to replace possitive cable terminal end (multiple factory cables) & install new battery, I cleared ...
2010 Nissan Armada SE 5.6L Nats VIN: 5N1BA0ND3A
Sorry for the delayed close. The issue was a bad key fob battery and a very non-user friendly tool.. As far as the window, my new switch was bad(from the dealer)... We use and I-scan 2 and I can't begin to tell you the unrelated menus we had to go through t...
2005 Pontiac Montana 3.4L ABS system VIN: 1GMDV23E85
We drove this vehicle many times while watching wheel speed signals on lab scope. Never dropped out while we had vehicle. Because we couldn't duplicate it, customer elected to go with new harnesses as suggested by many here. Issue has not re-occurred to this p...
2004 Toyota Tundra Limited 4.7L MIL Lamp on VIN: 5TBDT48154
thanks for the input. yes it's oe sensor, no contamination, no exhaust leaks, previously found tsb about that, replace exhaust gasket before b2s2 02. I am fairly confident about re-flash and o2 replacement. but the mode 6 data shows a component about to fail... Trouble codes: P0156 (B2s2 o2 cir).
2009 Volkswagen Jetta TDI 2.0L MIL Lamp on VIN: 3VWPL71K59
Thanks for the replies and info on this. The particulate filter is most likely clogging up due to local only driving. I called the dealer and found the car is not under warranty for this after 80k miles. I advised the owner to drive the car hard for longer per... Trouble codes: P047E.
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