2006 Chevy HHR LT P0013/P0014 and U0073 Codes After Intake Camshaft Actuator Solenoid Replacement
I own a 2006 Chevrolet HHR LT. Initially, I received a P0010 code, which led me to replace the intake camshaft actuator solenoid. After the replacement, the traction control light remained on. While the P0010 code disappeared, new codes appeared: two instances of P0013 and one of P0014, along with two U007073 codes. Could it be that the exhaust camshaft actuator solenoid was malfunctioning before but went undetected by the ECU? Or is it possible my OBD2 scanner is providing inaccurate readings or misinterpreting the data? I'm seeking clarification on whether these codes are related to a deeper issue with the variable valve timing system, or if they could stem from wiring problems, incorrect oil usage, or improper installation. I've read that VCT systems rely heavily on engine oil quality and condition, so using the correct oil weight, maintaining proper oil levels, and ensuring clean oil may be essential. Additionally, I'm concerned about potential electrical connections—such as loose terminals or corrosion—at the solenoid connectors. I also want to confirm if U0073 indicates a CAN bus communication issue that might require a scanner capable of reading all vehicle modules (e.g., ABS, SRS), and whether any aftermarket modifications or added electronic devices could be causing this problem.
Current codes: - U0073: CAN bus communication issue - P0013 (Bank 1): Camshaft Position - Actuator Circuit (Intake) - P0014 (Bank 1): Camshaft Position - Timing Over-Advanced or System Performance (Intake) The multiple codes are likely appearing across different ECU memory files—current, history, and pending. The traction control light issue may require a scanner that can access all vehicle modules including ABS and SRS. Best practice is to replace both the intake and exhaust camshaft actuator solenoids together, as they often work in tandem. Oil plays a critical role in VCT systems—ensure you're using the correct viscosity, clean oil, and proper oil level. Adding one can of 'Risoline' oil detergent may help improve performance. Inspect wiring at both solenoid connectors for 12V power, secure connections, and signs of corrosion. Regarding U0073: Are there any other symptoms besides the check engine light? A scanner capable of reading ABS and SRS modules might reveal additional fault codes. Sometimes aftermarket modifications or added electronic devices can interfere with the system—anything non-original should be considered a potential cause.