P0489

DTC P0489, sometimes indicated as P048900 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing exhaust gas recirculation "a" control circuit low.

The exhaust gas recirculation (EGR) system helps reduce emissions by recirculating a portion of the exhaust gas back into the engine. The EGR "A" control circuit low DTC is set when the EGR control circuit voltage is below the expected voltage.
There are a few possible causes of this DTC, including a defective EGR valve, a leak in the EGR vacuum hose, or a defective EGR solenoid. If the EGR valve is defective, it may not open or close properly, which can cause the EGR control circuit voltage to drop. If there is a leak in the EGR vacuum hose, it may not be able to hold vacuum, which can also cause the voltage to drop. If the EGR solenoid is defective, it may not be able to control the EGR valve properly, which can also cause the voltage to drop.
If the DTC is set, the best way to troubleshoot it is to start by checking the EGR valve, the EGR vacuum hose, and the EGR solenoid. If any of these components are defective, they will need to be replaced.

• P0489: Exhaust Gas Recirculation A Control Circuit Low
• P0489: Exhaust Gas Recirculation "A" Control Circuit Low
• P0489: EGR Control Circuit Low
• P0489: Exhaust gas recirculation (EGR) system – circuit low
• P0489 02: Exhaust Gas Recirculation (EGR) Motor Control Circuit Short to Ground
• P0489 12: Exhaust Gas Recirculation (EGR) Motor Control Circuit Low Input
• P0489 00: Exhaust gas recirculation (EGR) system - circuit low