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P0404

Hi there. The codes are coming up for the camshaft position sensor (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement), Oxygen sensor (https://www.yourmechanic.com/services/oxygen-sensor-replacement), EGR valve (https://www.yourmechanic.com/services/exhaust-gas-recirculation-egr-valve-replacement), and evaporative (https://www.yourmechanic.com/services/canister-purge-solenoid-replacement) system not working. The fuses for EMS1 and EMS2 and the main relay vary depending on what Aveo...

Having the engine code is a great first step to getting your Pontiac Montana running up to speed again. This engine code is reading EGR, which stands for Exhaust Gas Recirculation. The EGR’s job is to redirect a measured portion...

Hello. Thank you for writing in. Due to the p0405 code (https://www.yourmechanic.com/article/p0405-obd-ii-trouble-code-exhaust-gas-recirculation-sensor-circuit-a-low-by-jay-safford), you will want to start by replacing the sensor. This is typically easier and cheaper than replacing the EGR unit all together. If the light continues to illuminate,...