Hey fellas,

Car just stalled in traffic, pulled over, the engine turns lots of battery power would not start. 10 minutes later started no problem.

Runs fine, today after parking would not start, engine turns no problem. Waited 2 minutes and it started....

Here are the codes that were in the computer:

Reading Codes - U1000H and P0128C

Any ideas?

Thanks for any help you may have.

Jonathan

Check the crank position sensor...if the vehicle is still under warranty have the dealership replace. My 2003 CTS had the same problem where I would stop at the grocery store and come back and it would crank without starting. After 10-15 minutes, it would start without any problem. This occured intermittently for a couple months, so I checked the fuel pressure which was OK. At one point the car died while stopped at a red light, so I had the car towed (free with OnStar) to a dealership. However, as soon as they backed the car off of the tow truck, it started up. The dealership couldn't identify the problem until I suggested checking the crank position sensor or camshaft sensor (from reading this forum)...it was the crank position sensor. The vehicle was out of warranty and they were charging $350 to replace, while the part costs about $40. I got a ride to the dealership and luckily the car started, drove it home, and replaced the crank position sensor myself.

^^Dang...what an adventure! I've ran out of gas with the CTS once and it was a B!TCH getting stuck in the middle of a curvy busy road! How do you replace that sensor Kharmair??

AAA HHAA!! Kharmair The dealer suggested right off the bat without reading the codes that it might be the crank position sensor!!! I bet they know it is a problem!

How hard is it to replace the sensor. I am good mechanically but not a super star... what did it involve?

Thanks buddy!

My guess was going to be that you used petro instead of gas, being you're in Canadia. :alchi:

[quote=Jonny223;934761]Hey fellas,

Car just stalled in traffic, pulled over, the engine turns lots of battery power would not start. 10 minutes later started no problem.

Runs fine, today after parking would not start, engine turns no problem. Waited 2 minutes and it started....

Here are the codes that were in the computer:

Reading Codes - U1000H and P0128C

Any ideas?

Thanks for any help you may have.

See if this helps.



P0128 - Coolant Thermostat Below Thermostat Regulating Temperature


U1000 - Class 2 Communication Malfunction

FAQ: OBD2 Codes Explained

OBD-II codes consist of a number of parts. Here is a sample OBD2 code:
P0171
Here is a breakdown of what each digit of the code means:
First Character - System

The first character identifies identifies the system related to the trouble code.

P = Powertrain
B = Body
C = Chassis
U = UndefinedSecond Digit - Code Type

The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

0 = Generic (this is the digit zero -- not the letter "O")
1 = Enhanced (manufacturer specific)Third Digit - Sub-System

The third digit denotes the type of sub-system that pertains to the code

1 = Emission Management (Fuel or Air)
2 = Injector Circuit (Fuel or Air)
3 = Ignition or Misfire
4 = Emission Control
5 = Vehicle Speed & Idle Control
6 = Computer & Output Circuit
7 = Transmission
8 = Transmission
9 = SAE Reserved
0 = SAE ReservedFourth and Fifth Digits

These digits, along with the others, are variable, and relate to a particular problem.

Take a look at the pages from the service manual. I was able to replace the CPS without removing anything else; however, it is very difficult to access. The sensor is located on the driver side of the engine closer to the firewall. The trick for getting the wire to route correctly is to use something like a tie strap to tie the exsiting sensor wire connector to the new sensor body. Then, after disconnecting the old sensor from the engine, pull the old sensor and wire out from the bottom of the vehicle. This should pull the new sensor down into position while retaining the original wire routing. It might help to have someone feeding the wire through from the top of the vehicle at the same time.

Hope this helps.

Ravindra

where did u get the SI documents?

Great! Thanks for the diagrams!!! I will give it a go!