What does the P0122 fault code mean?

[SanHazel]

P0122 fault code refers to a throttle or accelerator pedal position sensor malfunction. The solution involves: cleaning the throttle, checking whether the accelerator pedal sensor's plug is loose, whether the circuit is disconnected, etc., to detect the cause of the vehicle fault. Then, depending on the severity of the problem, choose to repair it yourself or go directly to a 4S shop for repair. Finally, after the problem is solved, clear the fault code. Precautions for throttle cleaning: 1. When cleaning the throttle, it can be left unassembled, but the intake sealing part must be cleaned thoroughly; 2. When choosing a cleaning agent, never use a highly corrosive cleaner, and pay attention to the cleaning force during cleaning to avoid damaging the coating.

[ConnorLynn]

P0122 trouble code indicates the throttle position sensor signal voltage is too low, which is like the car's brain complaining about receiving abnormal data. It usually appears after ignition when the engine warning light comes on, and this code shows up on the dashboard. The sensor is installed on the intake manifold and is responsible for telling the computer the throttle opening degree. A low signal can disrupt the air-fuel mixture, leading to unstable idle, poor acceleration, or even stalling. Common causes include aging of the sensor itself, poor or corroded wiring connections, loose plugs, or short circuits to ground. In this situation, I recommend first using a diagnostic tool to read the fault records, then checking the wires for damage or moisture corrosion. Sometimes, simply cleaning the connection points or tightening the plugs can solve the problem. If the issue persists, the sensor may need to be replaced, with labor and parts costs ranging from a few hundred to over a thousand yuan. Safety first—don't wait until a breakdown occurs on the highway; get it fixed when needed.

[BenjaminMarie]

After dealing with countless P0122 codes, it's most likely a throttle position sensor issue where the signal voltage drops below the standard value. Root causes vary, such as broken wires, corroded connectors, water damage, or internal sensor wear failing to send correct data. This fault can cause rough running, noticeable idle vibration, sluggish acceleration, and even stalling in severe cases. I often advise DIY preliminary checks: power off and wiggle the sensor connector, inspect wiring harness for pinch marks; also use a multimeter to test if the sensor's impedance changes normally—replace if abnormal. Quick repairs save hassle and money, but avoid tampering that could damage the ECU. If the light comes on while driving, don't floor the gas; instead, find a safe spot to pull over and inspect.

[StNevaeh]

P0122 means the throttle position sensor signal is too low. My car started shaking after this code appeared, and the unresponsive throttle at the initial press is really annoying. It could be caused by a faulty sensor element, broken wiring, or interference leading to false data. If not fixed promptly, it will increase fuel consumption and cause excessive emissions. A quick fix is to restart the engine to clear the code, but if it keeps recurring, check for loose connectors or aged/broken wiring. Getting it tested at a repair shop isn't expensive. If you DIY, remember to disconnect the battery to prevent accidents. Safety first—don't risk driving it in this condition.