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Lead Diagnostic Technician for a California Gold Shield Emissions Inspection and Repair Station. Over 25 years of Automotive Technician Experience in Dealerships and Independent Shops. Worked as a Technical Trainer for Snap On Tools and helped write the Exam questions for the California Smog Technician License Exam. RepairPal Staff member since October 2007.
Recent Activity

Question Answered: if oil is leaking into the radiator does taht mean its the head gasket??
February 16, 2012, 12:49 PM
Or, it could be a defective transmission cooler , if you have an automatic OR, it could be a defective oil cooler. Best to have a Pro look at this, so you get it correct.
Question Answered: How much does it cost to fix code P0430?
February 16, 2012, 12:46 PM
This is a cam sensor code, so about $100 for the sensor and about 1/2 hour of labor, so figure 150.
Question Answered: how do I change the spark plugs in the back
February 16, 2012, 12:46 PM
Remove the upper intake manifold, pretty common on newer V6 engines.
Question Answered: air suspension warning lights comes on after the first start.
February 16, 2012, 12:44 PM
You may have a leaking air shock, that sags over night. Every time you start the engine the air suspension does a self-test and the suspension pump runs to level out any of the shocks. If a shock sags too much because it is leaking air, then this will set a code and turn the air suspension light on for awhile.
Question Answered: what is causing a mysterious electrical problem?
February 16, 2012, 12:39 PM
This sounds like a weakened ground problem in your dash. When you operate different devices, they can not utilize their normal ground, so they cannibalize the ground from another device, which makes that device go 'wacky'.
Question Answered: 2003 buick century while driving service engine light flashes on and off.
February 16, 2012, 12:36 PM
There are about 2000 codes for this engine, so the best thing to do is to have a Pro level tech diagnose this problem, by scanning the engine/transmission computer while performing a test drive and duplicating the problem.
Question Answered: The navigation system is not charging. Is it an electrical problem?
February 16, 2012, 12:31 PM
Checking all the fuses is an excellent place to begin your inspection of this problem.
Question Answered: Engine sometimes sputters on a hard downshift, what's the problem
February 16, 2012, 12:29 PM
There are about 4000 codes for this engine, so the best thing to do is to have a Pro level tech diagnose this hesitation problem, by scanning the engine/transmission computers while performing a test drive and duplicating the hesitation.
Question Answered: Slight rough idle. RPMs fluctuate 150± sometimes. Surges at highway speeds.
February 16, 2012, 11:49 AM
This could be so many things. How are your mode 6 readings? This is the scientific data for the OBD-II system, not just scan data. See if something is borderline, like fuel trim, misfire counts, EGR ( if equipped ) and yes air/vacuum leaks. How are your coils? And how old is the mass air flow sensor? Again, check your fuel long term fuel trim, It needed to be no more than 4-5% on either bank.
Question Answered: throttle position sensor
February 16, 2012, 11:43 AM
This car has 4 throttle position sensors, 2 on the throttle body and 2 on the gas pedal, so I need to know the exact code. For the most part, the sensors fail on the electronic throttle body, which typically means a new ETC unit or electronic throttle control throttle body assembly ( not cheap ) with some new software.
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Comment: ABS Differential Sensor
September 17, 2010, 12:06 PM
Be sure to replace the Rear Differential fluid when you replace the rear differential ABS Sensor. Over time the fluid gets tiny metal particles from the ring and pinion gear operation and may cause another rear ABS Sensor code to set and could damage the new rear ABS Sensor
Comment: P0420 - OBD-II Trouble Code
September 14, 2010, 12:05 PM
The extension of the warranty is not for every Audi vehicle and it does not apply in every state. Once you have a proven P0420 code, have a service writer check you VIN in the database. The manufacturers are being forced into this against their own will, so please don't expect them to be very accommodating, in fact it may take some arm twisting. The original warranty for any Emissions System problem was 3 years and/or 50,000 miles, so the 8year/80,000 is already an extension of that. I would call Audi customer service as well. What specific year, mileage, and engine Audi vehicle do you have and do you have a confirmed P0420 CAT code? I also need to know what state you live in and if your car is Federal ( 49 state ) or California Emissions Certified.
Comment: P0420 - OBD-II Trouble Code
September 10, 2010, 10:53 AM
Usually the Emissions Warranty is only 3 years or 50,000 miles so 8 years and 80,000 miles is an extension of the usual warranty. A few of the VW and Audi Models have had their Catalytic Converter Warranties extended even beyond 8yr/80k. The extra long warranty is determined by many things in addition to the Year/Model criteria, such as Production date, Manufacturing plant, Engine Serial number, Production date etc.
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