What is the reason for the Cruze fault code 84 disappearing after restarting?
3 Answers
Cruze fault code 84 disappearing after restarting is a false fault and can be checked at a repair shop. Code 84 fault code: The meaning of the code 84 fault code displayed on the Cruze dashboard is that the vehicle's power may be insufficient, usually due to a throttle fault. If the throttle position sensor is damaged, it can cause the engine to shake and idle unstably. The engine may easily stall while driving, experience surging, or have difficulty starting. Replacing the throttle position sensor will resolve the fault. Other fault codes: P0001: Fuel volume regulator control - circuit open; P0002: Fuel volume regulator control - circuit range/performance fault; P0003: Fuel volume regulator control - circuit low voltage; P0004: Fuel volume regulator control - circuit high voltage; P0005: Fuel shutoff valve - circuit open; P0006: Fuel shutoff valve - circuit low voltage; P0007: Fuel shutoff valve - circuit high voltage.
The trouble code 84 appearing on my Cruze and then disappearing after a restart is really frustrating. Looking back, similar issues are often caused by the transmission fluid pressure sensor acting up: either the sensor itself is aging or there's poor contact in the wiring connector, leading to unstable signals. Bumps during driving or temperature changes can trigger the computer to report an error and light up the warning lamp; however, after turning off and restarting, the engine computer automatically clears temporary data and returns to normal. If left unrepaired, this could potentially accelerate transmission wear or even cause it to burn out. Later, I went to a repair shop where they used a diagnostic tool to confirm it was a P0841 code, and replacing the new sensor solved the problem. I strongly recommend you get it checked immediately to avoid delays, as it could affect driving safety and lead to higher long-term repair costs.
The frequent appearance and disappearance of common repair code 84 typically indicates transmission-related faults, such as oil pressure sensor or control circuit issues. The main causes are often corroded wiring harness connectors, poor contact, or sensor signal drift. After a restart, the computer resets and temporarily clears the error. However, delaying repairs can lead to transmission slippage and severe damage. It is advisable to use an OBD tool to read the data stream, inspect connection points, and replace faulty components to avoid potential risks. My recommendation is to conduct a comprehensive diagnosis of the wiring and oil pressure system to prevent unexpected failures. The cost is not high, but it concerns driving safety—do not risk continuing to drive.
