VVT solenoid location

Good evening,

What were all the code numbers? Codes rarely identify bad parts, just failed systems.

https://www.2carpros.com/articles/how-camshaft-variable-valve-timing-works

The fact you have both cam and crank sensor codes, it indicates to me a timing issue between the valves and the piston.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

https://www.2carpros.com/articles/camshaft-angle-sensor-replacement

I would start with a compression test as I think you have a bad timing chain.

https://www.2carpros.com/articles/how-to-test-engine-compression

Roy

You are welcome.

Yep, that is what happens when the chain moves.

Remove the spark plugs and see if it cranks over.

I attached the code possibilities for you. The 2 codes have the timing chain in common.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

There is no 339. Can you verify?

Roy

U0073 is a serial data line or communication line code.

DTC U0073 or U2100

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Vehicle > Initial Inspection and Diagnostic Overview
Review Strategy Based Diagnosis for an overview of the diagnostic approach.
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC U0073 00
Control Module Communication Bus Off

DTC U0073 71
ECU HS Bus Off

DTC U0073 72
ECU LS Bus Off

DTC U2100 00
Controller Area Network (CAN) Bus Communication

DTC U2100 47
Controller Area Network (CAN) Bus Communication

Circuit/System Description

The serial data circuits are serial data buses are used to communicate information between the control modules. The serial data circuits also connect directly to the data link connector (DLC).

Conditions for Running the DTCs

Supply voltage at the modules are in the normal operating range.
The vehicle power mode requires serial data communications.

Conditions for Setting the DTC

The module setting the DTC has attempted to establish communications on the serial data circuits more than 3 times.

Action Taken When the DTCs Sets

The module suspends all message transmission.
The module uses default values for all parameters received on the serial data circuits.
The module inhibits the setting of all other communication DTCs.

Conditions for Clearing the DTC

A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Circuit/System Verification

1. Refer to Data Link References to determine which serial data system is used for a specific module. See: Information Bus > Initial Inspection and Diagnostic Overview > Data Link References
2. This DTC cannot be retrieved with a current status. Diagnosis is accomplished using the symptom Scan Tool Does Not Communicate with High Speed GMLAN Device or Scan Tool Does Not Communicate with Low Speed GMLAN Device.

Hi I'm Tom,

The VVT solenoid will be at the head of the cam shaft. You should be able to see two wires leading in somewhere there.
Tom

Do your compression test first before replacing anything as I think you have an issue far beyond the VVT solenoids. I would not like to see you throw expensive parts at it to find out you need major engine work.

Roy