jguay

I just took my 05 coupe out for a quick run to warm it up after it sat for several weeks. All the tires showed low pressure, which I expected on a cold day. They all got up to pressure after a few minutes except the left rear which still showed zero. I checked the pressure once I got home and it was 30 PSI. I'm wondering if the sensor has gone bad or if there's a way to reset it?

Thanks in advance and happy new year to all

rdm1465

While the sensor is suppose to last alittle longer, it is possible it's bad. Anything electrical is bound to go bad at any time. You can have the sensor checked and recalibrated anywhere that has the reset tool. Keep in mind that if you replace the sensor on one wheel, it might be best to replace them all, to avoid the hasle of going in for each one as they go bad. just my opinion.

MARSC6

Sounds like the sensor may have died. I'd wait until you have the chance to go for a decent drive before replacing it just to be sure.

Walt White Coupe

There is no such thing as recalibration. As long as the system is reading them, there is nothing more that can be done other than checking the readout with an external monitor at the dealer. If the battery were dead in the sensor you wouldn't get any indication on the DIC so it sounds like the sensor just failed. It can probably be replaced by just breaking the outer bead by a competent mechanic. I'd have the balance checked afterward.

corvetteguy07

mine did same last week,after 25 mile drive it came back on. especially in cooler weather

Bill Dearborn

I would check my other tires first. There may be nothing wrong with the sensor. Somebody may have screwed up the TPMS programming or moved tires from one side of the car to the other. All the programming does is tell the car where each sensor is located on the car. If somebody moved tire locations or screwed up the TPMS programming the sensor could still be good.

Bill

Walt White Coupe

The OP makes no mention of anything being done to the tires. If the wheels were changed to different location they would still read out, only the location would be wrong.

dgrant3830

My '07 RR sensor every once in a while will go to "---", not zero, without any reason, then magically it'll fix itself within 10-30 minutes. No clue why.

gasdoc10

I just changed my battery today and after I started it up again, the tire pressures are all reading 00. Do the tpms sensors need to be reset after changing the battery? On a 2006, can it be done with a magnet or do I have to find a tire shop?

Walt White Coupe

First, no c6 can be reset with a magnet. You need a special tool called a "tire pressure reset monitor". I don't believe the tire pressure monitor system has to be reset because of a battery change. Did you drive it for a short distance to see if the readings came back?

Bill Dearborn

That is why I mentioned it. There are still some people who believe the TPMS programs itself to the correct location on the car. Just because he didn't mention moving tires that doesn't mean that service work wasn't done which leaves us with the possibility of the tires being moved. I thought it best to suggest the possibility that the system is calling out 0 pressure at the wrong location. The only time I have seen a 0 reading was when the tire had no air it. Everytime I have had a sensor go bad the reading changes to XXX not 0.

Bill

pcguy2u

Just finished going through this with the 05. The dealer wanted to replace just one and I balked because the problem had evidenced itself on 3 of the 4 tires - sometimes, 0, sometimes blank and sometimes XX. Sometimes, but not always, the speed limited to 55MPG message appeared. Then finally at the end, every time the engine was started the message "Service Pressure Monitor" appeared and all three tires showed 0, XX or " ".

That when the dealer finally agreed to replace all 4 sensors. Otherwise, I would have eaten the $100 deductible 4 times. Been 5 days now and no more messages.

BTW, tire pressures were never low through all that.

FloydSummerOf68

Mine did it for about 30 minutes with everything reading 0.

Everything has been fine since then.

BEZ06

The sensor ID#'s are stored in a non-volatile memory section of the TPMS computer in the car (actually part of the RCDLR module).

Once the sensors are logged into the TPMS memory their data should stay in there until replaced by different ID#'s by doing a new relearn procedure.

However, just like files in your computer, somehow they can sometimes get corrupted.

Another forum member that lives near me has a 2005 and one of the sensors was reading "0" for a while (I think it was "0" rather than "xx"). He drove by my house and we checked out his sensor by first just doing a diagnostic check of it, and my fairly high-end TPMS tool (an OTC 3833, which has a screen display) said "Battery OK". So, we did the relearn procedure to re-register all his sensors into the TPMS memory. The procedure only takes about a minute to perform. That was a couple months ago, and AFAIK he hasn't had any more problems from that sensor.

So.....although the sensor ID#'s are stored in a part of memory where they shouldn't be lost when you disconnect the battery, or for any other reason, we all know that sometimes a computer file can get a bit messed up (pun intended).

If it's an intermittent problem, it may be the battery in the sensor getting weak, although owners with aftermarket wheels with the sensors banded deep inside the wheels sometimes have weak signals from the sensors because of their location inside the wheel.

If it's a persistent problem, it could very well be a sensor battery problem, but perhaps it just needs a relearn procedure performed to reprogram the sensors into the TPMS memory.

Like Bill Dearborn said, if work has been done on the wheels/tires, maybe the sensors got swtched to different locations than they were programmed to. In that case, even though jerryguay (the OP) got a DIC message that the LR was 0, if the sensor that was originally on the LR is now on some other corner of the car, the low pressure would be in what ever tire now has that sensor in it. Check all the tires and the low pressure might be somewhere other than where the DIC says it is!!

Bob

robl45

I know this is old thread, but my battery went bad yesterday and now my left rear is showing zero. I've driven at least 50 miles and still zero. all the other 3 are working fine, this one was working fine too before the battery died. I put in a new battery last night and still it reads zero while the others are reading fine. do I need to have a dealer reset it or something? I've never had this problem before, I've had the tires changed, the dealer changed the battery one time when it died and no issues. I can't believe the sensor went dead at the same time as the battery, just doesn't make sense.

GQMGT

My 2010 does the same thing in hot weather.

Bill Dearborn

Each sensor has an unique identifier which is transmitted to the car. When the car is programmed the location of each sensor is stored in a register. If you lose car battery power the sensor location data isn't supposed to be erased but stranger things have been known to happen. It won't hurt to reprogram the sensors to make sure any erased info is restored but it is a long shot. It sounds like your sensor battery is getting low and the car isn't receiving a consistent signal from the sensor. I had this happen on my 08Z, first the sensor would read -- every now and then and other times it would read 0 pressure. Zero pressure caused problems since the few times it did that I was on the race track and the system immediately limited speed to 55 mph which killed the throttle just as I was exiting a corner at 80 mph with another car on my bumper. Replacing the sensor got rid of those issues.

Bill

Gearhead Jim

I replaced my battery last month, all 4 tires read 0 intil I drove it for a few minutes.

2k Cobra

We had new tires installed about 6 months ago.

Everything worked well until a few weeks ago. When I left the house I got a low pressure warning in LF tire. After a few minutes of driving, the warning went away. It's done this a few other times. When I checked the pressure on the DIC, it was normal. (Tires were OK)

These sensors were " Rebuilt " according to CA laws.

My bet is I need to replace sensor.

Welcome your opinions. 2k

Gearhead Jim

Yes, you probably need a new sensor(s). How old are they?

AFAIK, "Rebuilt" on a sensor only means they replaced the valve core, gasket, and nut. Nice things to do, but they can't help the battery that eventually dies.