Yesterday my check engine light came on and wont go out. HAd it checked at Advanced Auto and they came up with a P1601 and a P1000. They were unable to clear them. I have an ELM327 so I tried today to read and clear the codes, but its telling me there are no codes to be cleared or that are present at this time. Im also getting a traction control & stability control failure errors. But my reader isnt reading anything. Please help, where do I go from here?

 

I also from time to time get an "engine coolant low" error, but its never low at all and the temp never goes over 50%

 

Guys please help. Now its lit up like a Xmas tree. Along with the check engine light, traction and stability control failures, now the ABS and brake lights are on too. I took it for a spin after trying to reset the codes (still hasnt worked) it also at one point gave me a really hard downshift. It seems to be shifting mow but now Im scared to drive the car. According to Advance Auto, the P1601 error is an ecm/tcm serial communications error. P1000 is OBD test not complete. Can anyone please help?

 

That sounds like a failing battery or alternator. Back to Advance Auto and have them check the battery and charging system. It could also be a bad connection, there are several in both the pos. and ground systems.

 

Thanks RJ237. Could a bad battery/alt also cause a hard downshift? At this point every damn warning light is lit up. The best way to troubleshoot is usually to start with the easiest, most obvious answer. The battery in this car looks almost brand new and the terminals are super clean, but Ive also never had a car show these symptoms from a battery before. This is also my 1st Jag though. Ill start with a new battery and hope for the best.

 

I disconnected the battery for over an hour, cleaned the battery terminals, no change. Another odd symptom that might help you guys help me, the lights on the J gate shifter flicker, they didnt do that before.

 

OK, take a deep breath, mate! P1000 is a result of resetting the codes. It will clear when you have completed a drive cycle as long as nothing codes in the mean time. As to P1601, it is many times a result of connecting the scanner interrupting the communication, but in your case, it might very well be indication of a drop of the communication channel ie the link between the engine control and the transmission control.
You very well might also have a module code theat generic readers will not read, but will light the CEL. For that, you need a scanner that is equivalent to "dealer level". Check the archives.

As RJ237 said, a failing battery on these cars can lead to these symptoms. And since you are getting more and more systems failing, I would guess that he is spot on. You should measure the battery voltage running and stopped. 13.75 volts or so running is about right and 12.5 to 13 stopped.

 

Thank you. Will get the battery checked first thing tomorrow

 

Battery and alternator all checked out fine. Now Im also getting a P1642 error. I also notice the steering feels very heavy at parking lot speeds, then opens up a short time later.

In what will surely go down in "dumbass" history, I think this is/was my fault. I plasti dipped my wheels this weekend but did so with the wheels still on the car and didnt cover the calipers and rotors as I should have. So its very possible I myself got paint on an ABS or speed sensor? I know, what an idiot. I dont have access to a lift so I cant get it in the air to look closer at those parts. Do you think its possible some sort of cleanser like Simple Green or WD40 might work if I can get them to spray behind the wheel but on the calipers? Anyone know what the p1642 code is?

 

The code P1642 means that the CAN network had a malfunction. This is due to any of the modules going offline or losing power or ground. There will be codes stored in the other modules on the CAN network (ABS, TCM, Instrument Pack, J Gate shifter, and climate control module). These codes will not come up on a generic scan tool. You will need a Jag compatible scan tool to read these codes.

 

P 1642 is a CAN circuit error. Do you have your ELM327 plugged in when you get the codes, or do they occur without it? Just thinking it might not be using protocol ISO 9141, and could be the cause of all the faults.
If not, it may be the instrument pack is damaged. Please list all the codes.

 

All the codes are p1000, p1612 and p1624. After a few liberal dousing with simple green then wd40 onto the calibers, it seems for now all the errors have cleared themselves, for now anyway. Now all I have is the check engine light. Anyway I can clear that?

 

Do you have a code reader (useable ones are in the $75 USD range for a simple one...check the stickies in the forum for suggestions)? If so, plug in, read codes, and then reset. You'll get the P1000 again, but a few drive cycles for all the checks to complete should bring you back clean with only the P1111 set (which is the all checks completed code...).

Failing that, many of the auto parts stores (I know Autozone) will read and reset for $0.00 USD.

 

In his first post he said he has an ELM327.

Muti007- The modules on the CAN bus cannot be read be a generic reader. You will have to visit a foreign car specialist that can read Jag specific codes, or, failing that, a dealer.
The modules can usually repaired, so don't let some one sell a new one at a cost exceeding the value of the car.

 

The only OBD reader I have is the ELM327. My local Advanced Auto read the codes but said they werent allowed to clear them. I know Ive had them cleared before by either Autozone or Advanced, so Ill have to do some driving around until someone is willing to clear it for me. it seems for now all the errors have cleared themselves. For now anyway the ABS and brake lights arent lit up now, and the traction and stability control failures dont seem to be present anymore after cleaning everything with Simple Green and WD40. Now all I have is the damned check engine light which my code reader cant clear.

 

Thanks RJ. The Advanced Auto shop had a reader that could read my codes, but they refused to reset it. At this point, I dont want the codes rechecked, I just want to clear the CEL

 

I have not heard of any auto store being able to read Jag specific codes. If they could, they would have been able to identify which module was causing the CAN code and what abs codes were causing the light to be on.
You will not be able to erase the check engine light until you fix the problem in the CAN bus, and you can not identify that.

 

Where are you in the Philly area? I know a good indie wrench...has the Jag scanner...you could talk with him (he's up in the Falls Township area); reasonable cost, and does good work.

 

I'm in the Bensalem, bucks county area. The 3 previous I mentioned came from a reader at Advanced Auto

 

Good news and bad news. The good news is that I believe Ive resolved the issue. The bad news is Im a dumbass, lol. Once I figured I must have gotten paint on the ABS or speed sensors, I proceeded to clean them with a generous helping of Simple Green. Then I hit them up with a **** ton of WD40. Shortly thereafter, ALL of the "oh ****" lights (traction control failure, stability control failure, ABS and brake lights) went out. I think I got them clean enough that theyre now broadcasting to the on board computer now, and the only thing left now was resetting the CEL. Well the guy I bought the car from was supposed to remove all of my tint today (it was a really poor tint job and Ill wait until I can do it right with ceramic tint, 30% or darker.) The sellers family business is a detail shop at a Buick dealership, though theyre also an independent shop. When I told him what was going and what I thought I did wrong, he immediately told me man you got paint on the sensors, with which I concurred. So he had the CEL reset, its no longer on and now its running just great. I hope, lol.