DTC P1491: EGR SYSTEM MALFUNCTION 1. Perform PCM reset procedure. Connect SCS service connector. Start engine and run at 3000 RPM with no loads and transmission in Park …

P1491-RAD FAN CONTROL RELAY CIRCUIT. When Monitored: With the ignition key on, battery voltage greater than 10.0 volts and. the PCM requests the radiator fan to be turned on. Set …

Customer: p1491 code coming up on a 2003 Nissan Xterra SE/SC. It is stated as the "vacuum cut valve bypass valve". It is stated as the "vacuum cut valve bypass valve". What are the steps to …

Aside from the P1491 code and TCS light the car tends to occasionally lurch forward on slow acceleration. I am pushing down the pedal with no immediate response and then it suddenly …

The code P1491 comes up as radiator fan delay circut open for Dodge/Chrysler. I mean "frynig" as in the Relay gets so hot that it starts to melt the plastic on it and the (PDC). "P1491 †…

DTC P1491 - EGR SYSTEM 1. Perform PCM reset procedure. Connect SCS service connector. Start engine. Raise and hold engine speed at 3000 RPM with transmission in Park or Neutral, …

P1491 is for the a/c condensor fan's relay control circuit. Open the fuse box under the hood and you should find fuse number 39 is blown. If it is, you'll need to replace the condensor fan …

Customer: Hi, I have a 2010 Subaru Forester 2.5i with a persistent P1491 code for the blow by sensor. I've put in a new pcv valve and also replaced the sensor with another on (used) a …

I am getting trouble code P1491 on my Dodge Ram 1500 - yr 2002. It says it is the radiator fan relay circuit.

Shop told me they traced my wires upto the PCM. PCM was recieving but was not transmitting that the cooling fan needed to be activated. As of wires C1 and C2. $50 for diagnoses. OK. …