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P0440

Hi there. Check the Exhaust Gas Recirculation (https://www.yourmechanic.com/services/exhaust-gas-recirculation-egr-valve-replacement) valve on the engine. It seems to be sticking on when the engine is running at low idle and causing a misfire as the old exhaust that is burnt is reentering the...

Hey there. A faulted purge solenoid may cause some problems, but is not likely the cause for the vehicle stalling. The camshaft (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) or crankshaft position sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) is a common failure item on these vehicles and does not always...

Hi there, thanks for writing in. This code (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) is for a leak or failure in the evap emissions system. By far the most common cause of this is a bad gas cap (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-gas-cap). If the seal on the cap...

The most common cause for a P0440 code (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) is the fuel cap seal. I suggest making sure that the fuel cap is tight by turning until it clicks. If you are sure that your fuel cap was tight, replace...

These valves (https://www.yourmechanic.com/services/evaporation-vent-solenoid-replacement) are controlled by the PCM so the circuit will not be closed until commanded by the PCM and that closure can be through the ground side. If the circuit is competed through the ground side, you will...

Hi there, A P0440 code (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) is stored for an emission related fault; evaporative emission control malfunction. The evaporative emission system is responsible for preventing the release of fuel vapor into the atmosphere. When there is a fault in the...

The trouble code P0440 (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) means the Evaporative emission control system is malfunction. This malfunction may have been caused by a number of different things including, a loose or missing gas cap (https://www.yourmechanic.com/services/gas-cap-replacement), a vacuum leak (https://www.yourmechanic.com/article/is-it-safe-to-drive-with-a-vacuum-leak), a faulty purge...

Hello. The P0440 code (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) you are getting is for an EVAP system problem. This code is generic so the system needs to be checked. Most of the time it is because of a system leak such as a fuel...