What does the p0487 EGR throttle control code mean?
What does the p0487 EGR throttle control code mean?
This code is looking at the voltage signals from the EGR throttle control valve to determine if they are correct based on inputs to the PCM. This code is letting you know that there is an electrical circuit fault. Troubleshooting steps may vary depending upon manufacturer, type of EGR throttle control valve and wire colors.
How does the EGR throttle control valve work?
The Powertrain Control Module (PCM) tells the Exhaust Gas Recirculation (EGR) throttle control valve where to position itself. This code is looking at the voltage signals from the EGR throttle control valve to determine if they are correct based on inputs to the PCM. This code could have been set due to mechanical or electrical issues.
How is the exhaust gas recirculation throttle position controlled?
DTC P0488/15 EXHAUST GAS RECIRCULATION THROTTLE POSITION CONTROL RANGE/PERFORMANCE CIRCUIT DESCRIPTION The ECM opens and closes the intake shutter (throttle valve) using the step motor. Upon opening and closing the valve, the exhaust gas recirculation volume is properly controlled.
What’s the problem with the p0488 exhaust gas recirculation system?
P0488 – Exhaust Gas Recirculation (EGR) System Throttle Position Control Range/Performance Trouble Code Fault Location Probable Cause P0488 Exhaust gas recirculation (EGR) system, Wiring, poor connection, ECM
This code is looking at the voltage signals from the EGR throttle control valve to determine if they are correct based on inputs to the PCM. This code is letting you know that there is an electrical circuit fault. Troubleshooting steps may vary depending upon manufacturer, type of EGR throttle control valve and wire colors.
The Powertrain Control Module (PCM) tells the Exhaust Gas Recirculation (EGR) throttle control valve where to position itself. This code is looking at the voltage signals from the EGR throttle control valve to determine if they are correct based on inputs to the PCM. This code could have been set due to mechanical or electrical issues.
What causes a faulty EGR valve in a car?
The first part is faulty EGR valve or problem with wiring harness (open or short circuits, broken wires, damaged or corroded connectors). The other part is related to throttle position control circuit. Modern cars use the so called “drive by wire systems”.
How does the PCM control the EGR valve?
The PCM not only controls EGR valve function, it also monitors manifold absolute pressure (MAP) and exhaust oxygen content to determine whether or not the EGR is functioning properly. Some EGR valves are also equipped with valve position sensors which reflect (to the PCM) the percentage in which the valve is actually opened.
