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Ron Ananian, The Car Doctor - Classic Car Doctor - October 10, 2015 - Hour 1 - Audi Codes, Airbags & Frozen Custard

Ron Ananian, The Car Doctor - Classic Car Doctor - October 10, 2015 - Hour 1 - Audi Codes, Airbags & Frozen Custard

Ron Ananian The Car Doctor Jun 04, 2026 36 min
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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.

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Technical Too Afraid to Ask
Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Car

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Brand

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.

Term

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.

Term

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.

Term

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.

Term

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.

Term

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.

Topic

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.

Term

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.

Term

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.

Term

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.

Term

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.

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