Rick's Free Auto Repair Advice

Posts Tagged: P0404

EGR valve P0403 P0404

Fix code P0403 P0404 EGR valve If you get a P0403 or P0404 EGR valve code on a Dodge, Plymouth, or Chrysler vehicle you might want to replace the complete EGR assembly. But you don’t always have to. These two trouble codes are usually caused by a bad EGR transducer. The dealer doesn’t sell just the EGR transducer, making you buy the entire EGR valve. But Standard Motor parts now sells just the transducer so you can save money and avoid disassembling the entire valve and the EGR tube. Click here … Read More


Fix code P0404 Exhaust Gas Recirculation (EGR) Circuit Range Performance If you have a P0404 EExhaust Gas Recirculation (EGR) Circuit Range Performance trouble code, read this to understand what it means Engines recirculate a small amount of exhaust back into the intake manifold to reduce combustion temperatures and lower smog causing oxides of nitrogen emissions. The computer commands the EGR valve to open a certain amount and then checks to make sure it’s operating properly. One way to check is to mount a position sensor on the shaft of the … Read More

P0401 EGR insufficient flow – Chrysler Minivan

Fix trouble code P0401 egr insufficient flow – Chrysler Minivan Late model Chrysler Minivans are known to post P0401 egr insufficient flow codes P0401-P0408. The egr valve is like an electronic solenoid that pulls the pintel off its seat. A position sensor at the top of the valve measures how far the pintel shaft has actually moved versus how much the computer commanded it to move. It’s the position sensor that goes bad (see plunger in photo). The problem may be in the sensor, but the fix is in replacing the … Read More

P0405, P0406 – Ram, Jeep

Fix trouble codes P0405, P0406 – Ram, Jeep Dodge has disclosed a problem with P0405, P0406 on some 2006-07 Ram Trucks and Durangos and Jeep Grand Cherokees and Commanders. All of these vehicles were built before 2-15-07 and may light up the “Check Engine” light and store P0404, P0405, or P0406 EGR position sensor codes. Check the EGR with a scanner, but chances are the codes are “false codes: due to a programming error in the PCM. The fix involves reflashing the PCM with software release 7.03 SP1 or higher. … Read More

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