What will it take to correct? trouble shooting p1574 code shown on a 2006 HHR

In a Nissan Altima, code P1574 typically indicates an issue with the ASCD (Automatic Speed Control Device) speed sensor A. This sensor is responsible for detecting the vehicle's speed and providing the necessary information for the ASCD system to function properly.
When this code appears, it usually means that there is a problem with the speed sensor itself, the wiring connected to it, or possibly a malfunction in the ASCD control unit. It can lead to issues such as the cruise control not working, the vehicle not maintaining a set speed, or other related problems.
To diagnose and fix this issue, you may need to perform the following steps:
1. Check the wiring and connections: Inspect the wiring harness connected to the ASCD speed sensor A for any signs of damage, corrosion, or loose connections. Make sure all connections are secure and free of debris.
2. Test the sensor: The ASCD speed sensor A itself may be faulty and need to be tested. You can use a multimeter to check the sensor's resistance and compare it to the manufacturer's specifications.
3. Check the ASCD control unit: If the sensor and wiring appear to be in good condition, the issue may lie with the ASCD control unit. Testing and potentially replacing this unit might be necessary.
4. Clear the trouble code: Once you've identified and resolved the underlying issue, you can clear the trouble code from the vehicle's system using an OBD-II scanner. This will reset the system and allow you to see if the problem persists.
If you are not comfortable performing these steps yourself, it's recommended to consult with a qualified mechanic or dealership with experience in diagnosing and repairing ASCD-related issues in Nissan vehicles. They can provide a more accurate diagnosis and solution to ensure your Nissan Altima's ASCD system operates correctly.

Take an have DTC'S - diagnostic trouble codes read .

Its your electronic steering motor

The fan is normally used for both heating and cooling. Check the owners manual for the fuse location and see if it is blown. If so, replace it and try the fan again. If the fuse blows again, the motor is probably seized and will need a mechanic to oil and free or replace it. If you can get to it your self, BE CAREFUL, and touch the motor when it is turned on. if it gets hot without turning, it is probably electrically OK and seized. If it does't get hot or hum and the fuse is OK, Its either bad or has a problem that will need to be traced. Best to take it to a GOOD mechanic that you trust. Trouble shooting can get complicated.

You may need a shop manual to get the testing procedures.
Code 303 is for a miss on cylinder 3 which could be ignition or fuel related.
Code 1174 is for a problem with the fuel trim which could be due to the problem with cylinder 3 or something else.

Could be something causing the engine to die which is making the warning light come on, or something that the computer sees as a threat of damage to the engine and the computer is shutting down the engine to prevent damage.
You would have the computer scanned for trouble codes and then proceed with troubleshooting the issue.

First thing to do is get the computer scanned for trouble codes.
It could be a thermostat or several other things.

Could be for the traction control.
You would need to have the body computer scanned for trouble codes to proceed.

lambda probes are fitted between the exhaust manifold and the first box(cat)cannot miss them as no other part of the exhaust system has wires coming out of it.

if you don't have the correct tools don't try to do it you self. the springs are under alot of pressure. can break your neck if it shoots out. have a shop do it for your safety