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Discussion Starter #1
my 2006 forenza from time to time will jerk hard when going from park to reverse, and the dash display that indicates which gear you are in (park, reverse, drive etc) will be scrambled, the car will still move while in reverse, but when you put it in drive it will jerk hard again and the will move but it revs higher than normal and will not change gears, but you can put the car back in park and turn the car off, wait about 2 minutes then restart the car and the car runs and shifts normally. has anybody had this problem before and if so what was the fix for it, any help would be appreciated.
 

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thanks eric, i just came from autozone because the check engine light was on and the code that came up was p0705 which is the transmission range sensor circuit, thanks for your prompt reply, and is this a dealer only item.
 

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I'd be willing to bet they're dealer only, but they're less than $50, so not too terrible..
~Erik~
 

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Transmission Range Selector Switch

I have an 06' Forenza and my car has been doing the same exact thing as your car. Its been doing it for about a month. I have 64k miles on my car.
I just took my car to the dealership where I purchased it. It cost me $69 to have them plug it in and give me a diagnostic. They told me it was the range switch, which is not under the 100k warranty. The dealership wants to charge me $276 plus tax to have it fixed. Its complete bullshit! I found a local repair shop that will fix it for $120 plus tax. So do yourself a favor and DO NOT take your car to the dealership for repair!
:mad:
 

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It works....

I had the same problem and it was annoying. But I got on the internet and found this forum (thank God!). They recommended the Transmission range sensor, bought one from OEM Suzuki Parts (total cost was $45.00), slapped it on (very simple installation) and no more problems.

Thanks for that help, forum!!! :)
 

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heads up on electronics issues

I have an 06' Forenza and my car has been doing the same exact thing as your car. Its been doing it for about a month. I have 64k miles on my car.
I just took my car to the dealership where I purchased it. It cost me $69 to have them plug it in and give me a diagnostic. They told me it was the range switch, which is not under the 100k warranty. The dealership wants to charge me $276 plus tax to have it fixed. Its complete bullshit! I found a local repair shop that will fix it for $120 plus tax. So do yourself a favor and DO NOT take your car to the dealership for repair!
:mad:
being a forenza owner i see your point, being a dealership mechanic for gm/chevy, i will say this about dealership work....

theres many reasons why sensors go out,
1) worn out... happens ALOT
2)moisture/dirt RARELY a plug will not seal properly and cause connections to corrode(rust) and will cause a circuit failure (loss of power to the sensor,etc) causing a code
3) my all time favorite .... electrical, ive seen rare cases where a voltage is not what its supposed to be and caused the initial failure AND damaged the replacement parts

i HATE spending money fixing things, and I HATE the thought of someone else's hands on MY CAR....
but this is the wife's car, and its going to be fixed right, i feel your pain when it comes to problems, i work on trucks that cost well over $100,000 and am used to the concerns my customers have. but if there's a known issue (there are hordes of databases that customers are not privy to that document everything from bad wiring connections, to fuel line issues etc that only dealers have access to) as a mechanic, it would suck for me to replace a part, tell wifey that is fixed, and have something else fail because i didnt know that x voltage was supposed to be yy.y instead of zz.z or that theres some sealant required on the connection to ensure that elemental effects dont damage the connections

and quite frankly, $276 for a sensor replacement.... is a heck of alot cheaper than $3000 for a new transmission, etc

i have yet to get rid of a car w/ less than 340,000miles so... take advice for what it is.. advice, you dont have to do anything anyone tells ya, but from both sides of the fence, ive seen some ugly ugly problems that could have been avoided by paying the premium and letting the Pro's do their thing
 

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just got off the phone w. the service mgr @ Planet Suzuki (i bought it from there, they treat me right=PROMO!!)

according Mr Payton, you yourself CAN change out the sensor, HOWEVER, you still need a Suzuki Tech 2 programming computer to program the TCM (Transmission Control Module) to accept the new sensor (new OBDII systems sometimes require the serial # of the replacement module,.. this is common w. GM vehicles.. and oh by the way.. the 06's are running GM powertrains :-D)

so... save yourself the time of swapping out the part and driving 25mph down the road to your nearest dealership... just pay the money and let them do it, apparently its a very well known problem and they can do it in one step (unless you want to buy the Tech2 Suzuki scanner, last one i priced.. was just under $4,200 brand new from suzuki, or $2000 for a refurb).... but then u still gotta pay for the software subscription $500/yr, and you have to learn how to use a Tech2!
 

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according Mr Payton, you yourself CAN change out the sensor, HOWEVER, you still need a Suzuki Tech 2 programming computer to program the TCM (Transmission Control Module) to accept the new sensor (new OBDII systems sometimes require the serial # of the replacement module,.. this is common w. GM vehicles.. and oh by the way.. the 06's are running GM powertrains :-D)
Incorrect. The only time the Tech2 is required to initialize anything related to the transmission is when the TCM or the transmission itself is replaced, or as (basically) part of troubleshooting shift ptoblems. Data/trouble code reading or control functions are another story, but you do not need the Tech2 to replace the range sensor. Just make sure the retaining bolts are centered in the slotted holes in the sensor (supposed to be for adjustment, but centered has worked every time so far), and make sure the sensor goes on the shaft cleanly, as not to destroy the splines on the inside of the new sensor. Not really that hard, especially for someone who's a mechanic anyways. Big Daddy, you'll probably be quite familiar with this car, as the Aveo is just a tiny Forenza/Reno.
~Erik~
 

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I'm with zstalker

Here we have BigDaddy telling us we need to use the Tech2 when I am myself changed the range sensor without it with no problems whatsoever, and I would be willing to bet I'm not the only one after reading through the forums. Like zstalker said, "Not really that hard, especially for someone who's a mechanic anyways." And guess what....I'm not a mechanic!
 

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Here we have BigDaddy telling us we need to use the Tech2 when I am myself changed the range sensor without it with no problems whatsoever, and I would be willing to bet I'm not the only one after reading through the forums. Like zstalker said, "Not really that hard, especially for someone who's a mechanic anyways." And guess what....I'm not a mechanic!
exactly. Basically I'm saying you have to have a little more mechanical ability than changing oil. So yes, they're user-servicable to a certain extent.:)
~Erik~
 

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I am having this same issue and want to replace the censor but I'm not sure where it is located can any one help with this? pics would be great
 

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I Just had this happend to me when i was going to church to park i put the car in reverse and bam CEL came so i started to drive and it feels like the car is in gear 1 when its in Drive but it says D on the dash (auto). I just got 30,500miles on 07 reno...
Update
The seems to be driving fine i reseted the ECU but the CEL was still there but the car seems to drive normal and no more thud sound when i put the car in reverse. So I went to Advance autos to use their scanner and came up with two Error codes P.0700(Transmission Control System) and P.0705(Transmission Range Sensor). unfortunately I have to work today and my next days off are wensday and thurs, but im going to take my car to the dealer in the morning.
 

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Transmission Range Sensor by any other name ...

Hello ...

This post has helped the most. I have a 2006 Suzuki Forenza with the same transmission issues. Just started occuring at around 61000 miles. I am all ready to replace the Transmission Range Sensor, however, I am having difficulty finding the part.

I have searched for it on the Suzuki parts page, but no luck.

On a different post in this forum (click HERE to get to that post), the poster gave this part number as the correct piece - 37720-86Z01.

But when I search for this on the Suzuki parts site, it brings up a neutral safety switch ... which seems to be a different part than I am looking for based on what I have found out there in web world.

Can anyone clear this mystery up for me? Where can I find a transmission range sensor for a 2006 Forenza?

Thank you!
Donald B
 

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37720-86Z01 is the transmission range sensor for the Forenza/Reno/Verona that regularly requires replacement. Black plastic, splined inside to match the shift lever.
~Erik~
 

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Help Please

Incorrect. The only time the Tech2 is required to initialize anything related to the transmission is when the TCM or the transmission itself is replaced, or as (basically) part of troubleshooting shift ptoblems. Data/trouble code reading or control functions are another story, but you do not need the Tech2 to replace the range sensor. Just make sure the retaining bolts are centered in the slotted holes in the sensor (supposed to be for adjustment, but centered has worked every time so far), and make sure the sensor goes on the shaft cleanly, as not to destroy the splines on the inside of the new sensor. Not really that hard, especially for someone who's a mechanic anyways. Big Daddy, you'll probably be quite familiar with this car, as the Aveo is just a tiny Forenza/Reno.
~Erik~

I have replaced the range sensor on my 2007 Suzuki Forenza. All was great for a matter of three days then the problems came back. I will be at a stop light / stop sign and my car will be in drive but not exceed 2-5 mph for the first few minutes. It was installed correctly and I am at a loss at this point
 

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error codes

I have Po733

P213

and P2135

Suzuki dealers are few and far between around here, closest is an hour and a half away, If its a transmission fail they will cover it under my powertrain, but they want 100+ just to run a diagnostic check, since it only happens when im in a stopped position, my friend seems to thing its a spark plug misfiring
 

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P0733: Gear 3 Incorrect Ratio
P2135: Throttle Position (TP) Sensor 1 – 2 Correlation
if these codes are indeed what is stored in the ECM and TCM's memory, you've got real problems. The P2135 will need a new throttle body assembly to fix, and the P0733 is an internal failure of the transmission. typically this trouble code requires the replacement of the transmission assembly, unless you've got a fluid leak or something like that causing it.
~Erik~
 
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