Strange error codes
Strange error codes Hey all, the other week I noticed my air wasnt working. Last Sunday we had a dyno day and a couple people brought out HPTuners and this is what they found:
P0452 - Fuel Tank Pressure Sensor Circuit Low Voltage (SES) (Pending) (OLD) (History) (Current) (Immature)
P0645 - Air Conditioning (A/C) Clutch Relay Control Circuit (OLD) (History) (Current) (Immature)
P0650 - Malfunction Indicator Lamp (MIL) Control Circuit (OLD) (Immature)
P0801 - Reverse Inhibit Control Circuit Malfunction (OLD) (History) (Immature)
P1637 - Generator L-Terminal Circuit (Pending) (OLD) (History) (Current) (Immature)
The AC wouldnt turn on even when forced and the SES light isnt working. The car actually runs fine, no problems at all. The only thing which has changed from the last time I got it tuned (about 2 months ago with none of these codes) is my monster tach. Any ideas what might be causing these codes? Thanks.
P0452 - Fuel Tank Pressure Sensor Circuit Low Voltage (SES) (Pending) (OLD) (History) (Current) (Immature)
P0645 - Air Conditioning (A/C) Clutch Relay Control Circuit (OLD) (History) (Current) (Immature)
P0650 - Malfunction Indicator Lamp (MIL) Control Circuit (OLD) (Immature)
P0801 - Reverse Inhibit Control Circuit Malfunction (OLD) (History) (Immature)
P1637 - Generator L-Terminal Circuit (Pending) (OLD) (History) (Current) (Immature)
The AC wouldnt turn on even when forced and the SES light isnt working. The car actually runs fine, no problems at all. The only thing which has changed from the last time I got it tuned (about 2 months ago with none of these codes) is my monster tach. Any ideas what might be causing these codes? Thanks.
Teching In
Joined: May 2005
Posts: 49
Likes: 0
From: santa ana, ca
if your car runs fine, i suggest that you sent your PCM to waite4me (jessebubb@yahoo.comn) he will turn the ses to off and set your error codes to "X" so that there will be no history and everything will report out as "ready" he can also get you more rwhp. i want my car to be like a hot babe with a great body. who cares if she has no brains.
dan
dan
On The Tree
Joined: Jan 2002
Posts: 107
Likes: 0
From: Round Rock, TX
Sounds to me like you have some potential electrical problems. Who installed the tach?
Here is a list of all the PCM codes that you list (most are on the second page).
I didn't look at all of them, but my guess would be that you are experiencing ground/voltage irregularities. What does your battery/alt report as amps cranking vs. driving? Did you try resetting the codes to see how soon they come back? Did you try measuring volt/resistance at any of the circuits? How did you tie into the PCM for your tach? Were any other wires accidentally clipped, soldered, etc?
Here is a list of all the PCM codes that you list (most are on the second page).
I didn't look at all of them, but my guess would be that you are experiencing ground/voltage irregularities. What does your battery/alt report as amps cranking vs. driving? Did you try resetting the codes to see how soon they come back? Did you try measuring volt/resistance at any of the circuits? How did you tie into the PCM for your tach? Were any other wires accidentally clipped, soldered, etc?
Last edited by TXNC5; May 21, 2005 at 07:51 AM.
Thanks TXNC5! If the trouble codes are cleared they just come right back. I installed the tach and ended up cutting the stock tack wire and using one of those screw on crimp deals to tie into. No other wires were touched. I'm getting ready to head out of town for the weekend so I'll have to check on the voltages when I get back. Also, last night at the track my drivers side window at times just stopped responding. It didnt bind ow slow to a halt it just wouldnt budge for up to a minute or so. Strange, I may just unhook the tack when I get back home to see if it makes any difference. Wierd, I dont get it.
Just for ***** and giggles I unplugged the red PCM connector and using my air compressor tried to blow out any debris which might have gotten in there. Fired the car up after that and the A/C worked like a champ. The SES light was on, but considering that wasnt working either, I'm happy. I'll have her scanned again but I'm hoping thats all it was.
