Ron Ananian, The Car Doctor - Classic Car Doctor - October 10, 2015 - Hour 1 - Audi Codes, Airbags & Frozen Custard
About this episode
Ron Ananian tackles the diagnostic grind—from draining cooling systems with the right exchanger to decoding Audi trouble codes like P0068. He critiques repair shops that chase one failure while missing safety items, citing a Durango case with an engine failure plus check-engine and airbag lights. The show also gets into accident/insurance disputes, explaining how airbag light behavior and “history” vs “hard fault” codes affect claims. Between calls, Ron chats with a frozen-custard business owner about troubleshooting credibility and custard vs ice cream.
From the Car Doctor archives — originally aired October 2015.
In this classic episode of Ron Ananian, The Car Doctor, Ron shares the repair story of the week involving a 2003 Dodge Durango with a failed engine that spent five months sitting partially disassembled at another repair facility before finally arriving at R/A Automotive. The story serves as a reminder of the importance of proper diagnosis, communication, and choosing the right repair shop.
Ron also helps a caller with an Audi A3 displaying a P0068 trouble code, answers a listener email regarding airbag concerns, and takes a call involving a 2012 Hyundai Elantra and an unusual insurance-related airbag issue.
In one of the more unique interviews from the archives, Ron talks with David Gott, owner of David's Famous Gourmet Frozen Custard and a longtime fan of the show. The conversation offers a fun look at small business ownership, customer service, and the relationships built through a shared passion for serving people.
A mix of automotive advice, real-world repair experiences, and memorable conversations from a different era of the show.
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ground strap
"Of course, the ground strap that was supposed to go from the firewall to the back of the engine block that somehow fell down between the engine and the transmission was sticking out through the dust shield in the trans cover, rubbing up against the flywheel as the engine ran."
A ground strap is like a metal “ground wire” that helps the car’s electrical system work correctly. If it’s in the wrong spot and gets rubbed or pinched, it can cause problems and even wear out parts nearby.
A ground strap is a dedicated metal connection that ties an electrical system to the vehicle’s chassis/engine ground. If it’s routed incorrectly and rubs or pinches, it can create electrical issues and also physically damage nearby components while the engine/transmission move.
flywheel
"…sticking out through the dust shield in the trans cover, rubbing up against the flywheel as the engine ran."
The flywheel is a heavy spinning part connected to the engine. It helps the engine run smoothly, and because it spins fast, anything that touches it can cause serious trouble.
The flywheel is a rotating mass attached to the engine that helps smooth out engine speed and provides a stable interface for the clutch/torque transfer. Because it spins at high speed, anything rubbing against it—like a misrouted ground strap—can cause damage quickly.
front pump life
"…and I'm gonna have to do something with that because at some point that ground strap pinched between the engine block and the trans may affect front pump life of the transmission…"
Automatic transmissions use fluid pressure to shift gears. The front pump helps make that pressure, so if it gets stressed or affected, it can wear out sooner.
In an automatic transmission, the front pump is part of the hydraulic system that circulates transmission fluid to apply clutches and control gear changes. If something pinches or interferes with the transmission’s internal components, it can reduce pump wear life by stressing the system or disrupting fluid flow.
check engine light
"It had a check engine light on, it had an airbag light on It needed so far is about six thousand dollars worth of work."
The check engine light means the car’s computer found a problem. It’s not something to ignore, because it usually points to a real fault that should be diagnosed.
The check engine light is the vehicle’s dashboard warning for an engine or emissions-related fault detected by the engine control unit. It’s a key diagnostic clue—if it’s on, the underlying issue needs to be found and fixed rather than focusing only on one failed component.
airbag light
"It had a check engine light on, it had an airbag light on It needed so far is about six thousand dollars worth of work."
The airbag light means there’s a problem with the airbag system. If that light is on, the airbags might not work the way they should in an accident.
The airbag light indicates a fault in the airbag system, such as a sensor, wiring, or airbag control module issue. If it’s illuminated, the airbag may not deploy correctly in a crash, so it’s treated as a safety-critical warning.
Dodge Durango
"In the case of this Dodge Durango, they didn't even get up the plate, and when they did they finally struck out. They got a foul tip. They got the car out of the shop, but they took so long to work on the car the customer will never go back."
A Dodge Durango is a common SUV people use for everyday driving. Here, the host talks about a Durango that sat in a shop too long, and the customer didn’t come back because the work took too long.
The Dodge Durango is a midsize SUV known for being used as a family hauler and daily driver, which means it often racks up “real world” maintenance issues. In this segment, the host uses a Durango case to illustrate how slow or incomplete repairs can cost repeat business.
P0068
"it's a P zero zero six eight and uh this week I'm going to have it looked at though. [634.4s] they talk about possible a dirty throttle body, a mass airflow censor, if you could clean it and vacuum leaks and stuff."
P0068 is a specific error code from the car’s computer. It usually means the car thinks the throttle is in one position, but the airflow readings don’t match that expectation.
P0068 is an OBD-II diagnostic trouble code that typically points to a mismatch between the throttle position and the amount of air the engine is actually getting. That’s why the conversation connects it to throttle control, airflow measurement, and possible vacuum leaks.
mass airflow censor
"they talk about possible a dirty throttle body, a mass airflow censor, if you could clean it and vacuum leaks and stuff. [645.4s] Well, you know I would obviously, Yeah, what the what the concern here is,"
This sensor measures how much air is flowing into the engine. If it’s dirty or inaccurate, the car can get confused about throttle position versus airflow.
A mass airflow sensor (often called a MAF sensor) measures how much air is entering the engine. If it’s contaminated or reading incorrectly, the ECU may think the engine is getting more or less air than it should for the throttle position.
vacuum leaks
"they talk about possible a dirty throttle body, a mass airflow censor, if you could clean it and vacuum leaks and stuff. [645.4s] Well, you know I would obviously, Yeah, what the what the concern here is,"
A vacuum leak is an air leak somewhere in the engine’s intake system. It can let extra air in, which makes the car’s computer readings not line up.
Vacuum leaks are unintended air leaks in the intake/vacuum system that let extra air enter the engine. That extra air can cause the ECU to see airflow that doesn’t match throttle position, leading to codes like the one being discussed.
throttle body
"they talk about possible a dirty throttle body, a mass airflow censor, if you could clean it and vacuum leaks and stuff. [645.4s] Well, you know I would obviously, Yeah, what the what the concern here is,"
The throttle body is a part that controls how much air gets into the engine. If it gets dirty, the airflow can be off from what the car’s computer expects.
The throttle body is the air-control valve that regulates how much air enters the engine. If it’s dirty or sticking, the throttle plate may not behave as the ECU expects, which can contribute to throttle-position/airflow code faults.
throttle position
"what the concern here is, we're seeing a problem with the throttle position is out of kilter, so to speak, in relation to it's it's flowing more air than the expect it to based on the angle of the throttle plate. [662.44s]"
Throttle position is how open the throttle valve is. The car uses that to estimate airflow, so if the numbers don’t match, the computer flags a fault.
Throttle position is the measured angle/setting of the throttle plate, used by the ECU to predict how much air should be flowing. When throttle position and airflow don’t agree, it often indicates a sensor issue, a dirty/sticking throttle body, or an intake/vacuum leak.
resets and adjustments
"So you know, you're gonna look at fuel trim, You're gonna look for vacuum leaks, You're gonna go do a basic, Yeah, throttle body cleaning and try to do some resets and adjustments as a starting point."
After you do certain repairs or cleanings, the car may need to “relearn” how to idle and respond. A reset clears old settings so the computer can start fresh.
Resets and adjustments refer to using diagnostic tools to clear learned values and recalibrate certain systems after maintenance. For example, after cleaning the throttle body, the ECU may need to relearn idle and throttle behavior.
fuel trim
"So you know, you're gonna look at fuel trim, You're gonna look for vacuum leaks, You're gonna go do a basic, Yeah, throttle body cleaning and try to do some resets and adjustments as a starting point."
Fuel trim is the car’s computer constantly adjusting how much gas it squirts in. It does this to keep the engine running with the right mix of air and fuel.
Fuel trim is the engine computer’s short-term and long-term adjustment to how much fuel it injects. It’s based on sensor feedback (like oxygen sensors) to keep the air-fuel mixture at the target ratio.
mass airflow sensor
"Yeah, Now, what about cleaning the mass airflow sensor. They have a certain type of chemical that you can use on that. Does that hurt them? No? ... Mass airflow sensor cleaning is a case by case basis. In my eyes, I don't just blindly do it because there's a lot of delicate electronics inside of a mass airflow sensor."
The mass airflow sensor tells the engine computer how much air is entering the engine. If it’s dirty or wrong, the computer may add too much or too little fuel, causing rough running.
A mass airflow sensor (MAF) measures how much air the engine is ingesting so the ECU can calculate the correct fuel quantity. If the MAF is contaminated or failing, the car may set fault codes and can run poorly until the issue is corrected.
idle
"Does the car? Does the car idle any higher than normal? Bob? No, not really a fact that doesn't. The only thing that it seems to do is when you first start it up, there's a little bit of a shake."
Idle is what the engine does when the car is sitting still. If something’s wrong, the car might idle too high, too low, or shake.
Idle refers to how the engine runs while the car is stopped and not accelerating. Many diagnostic checks focus on idle quality because issues like throttle-body contamination or sensor faults often show up most clearly at idle.
o ring seals
"[848.4s] Because the other concern becomes with throttle body cleaners, even though they say they're rated safe. You get it into [855.9s] the throttle body too much, the o ring seals that are on the ends of the shaft over time can be affected."
O-rings are small rubber seals that help keep things from leaking. On a throttle body, they sit near the moving shaft. If cleaner gets into places it shouldn’t, it can degrade those seals over time.
O-ring seals are rubber seals used to prevent air or fluid leaks around moving shafts. In the throttle body, the seals at the ends of the throttle shaft can be harmed by getting too much throttle-body cleaner into the wrong areas. That’s why the host says “less is better.”
carbon deposits
"[897.0s] And the other thing to be aware of is we still have the we still have problems with carbon deposits in cars today, and that's you know, it seems like carbon deposits and throttle body cleaning go hand in hand, right,"
Carbon deposits are gunk that can build up inside the engine’s air path. Over time it can interfere with airflow and make the car run less smoothly. The host is saying this is one reason fuel-system cleaning matters.
Carbon deposits are hardened soot-like buildup that can form inside the intake system and around the throttle area. The host links carbon deposits with throttle-body issues, noting they can build up over time and affect how the engine runs. Cleaning fuel systems is presented as part of managing that buildup.
fuel system cleaning
"[909.9s] That's why it's so important to clean fuel systems today and do fuel system cleaning. So, you know, just saying [916.6s] it's all it's all part of the process."
Fuel system cleaning is a service that helps remove buildup from the parts that deliver fuel to the engine. If deposits build up, the engine can run worse. The host is saying it’s part of preventing or reducing the same kind of buildup that affects the throttle area.
Fuel system cleaning refers to service procedures intended to remove deposits from fuel injectors, lines, and related components. The host argues that cleaning fuel systems helps address issues that go along with carbon deposits and throttle-body buildup. It’s positioned as an important part of the overall diagnostic and maintenance process.
Ross-Tech
"[933.7s] Yeah, the ross tech in which I won't eventually get when I get my laptop up and running. And that [939.7s] thing is awesome, that program."
Ross-Tech makes diagnostic software for certain car brands in the Volkswagen group. It helps you connect a laptop to the car to read trouble codes and check what the car’s computer is seeing. The host is excited about using it for troubleshooting.
Ross-Tech is known for VAG-focused diagnostic software used with an interface to communicate with Volkswagen Group vehicles’ ECUs. In the segment, the host mentions “ross tech” as a program he wants to use on his laptop for diagnostics. That implies using it for tasks like reading codes and performing relearn/reset procedures.
intake manifold gasket
"So you know, and keep in mind too that you know, you can have problems with an intake manifold gasket on that you can have you know a couple of things. Let them do their diagnosis and yeah and see where it goes."
It’s a seal that keeps the engine’s air passages tight. If it leaks, the engine can run poorly and the car may show warning lights.
An intake manifold gasket seals the connection between the engine’s intake manifold and the engine block. If it fails, air (and sometimes coolant or oil) can leak, which can cause drivability issues and trigger diagnostic trouble codes.
smoke machine
"Yeah, they just got a smoke machine, so I'm only got to see one work and I can't wait. Right, cool beans? Yeah, all right, Bob, you take good care of yourself and have a good rest of the afternoon."
It’s a tool that releases harmless smoke into a system to help find where air is leaking. If there’s a crack or bad seal, the smoke escapes and you can see it.
A smoke machine is a diagnostic tool used to find air leaks in vacuum or intake-related systems. It fills the system with visible smoke so leaks show up clearly during inspection.
backup cameras
"After the accident, the airbag light came on and the backup screen for the backup cameras started not to work occasionally. The body shop had a report"
These are the cameras that show what’s behind the car when you’re backing up. If they stop working after a crash, it can be due to damaged wiring or a module that needs diagnosis.
Backup cameras are part of a rear-view assistance system that displays an image when reversing. If the camera feed or the screen glitches after a crash, it can point to wiring, connectors, or control-module issues—sometimes related to the same impact that triggered other warning lights.
computer didn't register
"An insurance company denied it because the computer didn't register when the light came on."
They mean the car’s computer didn’t save any error information about the airbag warning. If the computer doesn’t record a problem, insurers may deny repairs because they can’t verify what happened.
When the speaker says the "computer didn't register," they’re referring to the airbag control module (the car’s diagnostic computer) not logging a fault or not recording an event when the airbag light came on. Insurance disputes often hinge on whether the module stored diagnostic trouble codes or recorded crash-related data.
airbags
"So let's back up a second. When she got rear ended, did the airbags deploy in the car? No? At thirty miles an hour."
Airbags are the safety cushions that pop out in a crash to help protect you. The car uses sensors to decide if the crash is serious enough to deploy them.
Airbags are safety devices designed to deploy during a crash to reduce injury. Modern cars decide whether to deploy based on crash sensors and thresholds, so it’s possible for a collision to cause damage without triggering deployment if the measured impact doesn’t meet the system’s criteria.
diagnosing airbag and camera faults after an accident
"Remember, any time an airbag light is on... But now the backup camera's not working... if it's a hard fault, it's present now... now I think you've got a case to go back to the insurance company."
They talk about how to figure out whether the airbag problem and the backup camera problem are connected to the crash. They also discuss how the car’s stored error codes can show whether something existed before the accident.
The host explains how to interpret airbag warning behavior alongside other post-accident symptoms like a non-working backup camera. He also outlines how fault codes (history vs active) can affect whether an issue appears accident-related.
code
"Has anybody you know the fact that they're saying, well, the code, there's codes in the system, or there's no codes in the system to support whether it was before or after."
A “code” is like a clue stored by the car’s computer when it finds a problem. It can show whether the issue is happening now or happened before.
In this context, a “code” refers to a diagnostic trouble code stored by the car’s computer when it detects a fault. Codes can help determine whether an issue is current (active) or occurred earlier (stored/history).
hard fault
"If it's a hard fault, it's present now. But the only way they would know that for sure is if they saw it prior to the accident."
A hard fault means the car’s computer is detecting the problem right now. It’s not just an old record from earlier.
A hard fault is an active diagnostic fault that is currently present in the system. If it’s a hard fault, the problem is happening now, not just something that was recorded in the past.
module
"If the problem is a module in the front of the car, then I don't think it's accident related."
A module is an electronic “brain” for a car system. If the problem is in a module, it may be a system fault rather than damage from the crash.
A module is an electronic control unit that manages a specific system (like airbags or cameras). If the fault is in a front-of-car module, the host suggests it may be less likely to be caused by the specific accident damage.
wire
"But if the problem is a wire in the rear of the car that got jammed up in the connection or damaged as a result of the accident, now I think you've got a case to go back to the insurance company."
Wires carry signals between the car’s electronics. If a crash damages or pinches the wiring, the car may stop working correctly in that area.
Wires are part of the vehicle’s electrical harness that connect sensors and modules. Accident-related damage can jam or break wiring in the rear, leading to faults like non-working cameras or airbag-related issues.
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