Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
What size engine in the vehicle?
The p0128 is a thermostat code, replacing the thermostat will fix this. It is pretty common. The coolant temp sensor affects fuel trims and you could be running rich if the thermostat is stuck open thus the gas odor.
C0121 An internal solenoid valve relay in the electronic brake control module (EBCM) supplies battery positive voltage to all solenoid valves. This voltage is referred to as system voltage. The EBCM activates the solenoid valve relay when the ignition is turned ON. Once the solenoid valve relay has been activated, The EBCM supplies ground to actuate individual solenoid valves.
ThPlease reply to this if you need more help and we can continue this conversation. This does not have to be my only answer. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. Hoping to be giving you 5 star service.ese are not related, but you may have to replace the ebcm to get rid of the C code.
Hello again Dan here,
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Let me help some more. Is there anything else I can help you with?
If I did not give you 5 star service, please let me know what I missed.