Trouble code P1538 means: Intake Manifold Runner Control Stuck Open (Bank 2)
Trouble code P1538 means: Intake Manifold Runner Control Stuck Open (Bank 2)
The diagnostic code P1538 for a 2000 VW Jetta means the engine shut off solenoid is open or short to ground. A common cause of this diagnostic code appearing is a lose wire to the fuel cutoff solenoid.
If it is P1538 it is for intake manifold runner control malfunction bank two stuck open.
Trouble code P1537 means: Intake Manifold Runner Control Malfunction (Bank 1 Stuck Open) Trouble code P1538 means: Intake Manifold Runner Control Stuck Open (Bank 2)
I have a 98 Windstar (3.8L)and the Vehicle Speed Sensor (code p1538) is located just above the transaxle passenger (right) side and is accessible from the passenger side (right) front wheel well. Although it is simple to remove and replace (one bolt and one electrical connector), it is not simple to get to unless you have a hoist. You have to lift up all four wheels and disable the auto-levelling suspension first. Then you have to remove the right front wheel and the rear wheel well panel to get to the part. Because I did not have a hoist (or four jack stands) I had pep boys do the work (about $50.00 labor). The part at auto stores runs about $15.00 if you have electronic (digital read-out) odometer, or about $28.00 if you have manual (or analog) odometer. However, mine turned out to be different alltogether and I had to buy the dealer part (none other would fit) for about $48.00. Turn Key at Pep Boys was about $100.00 Finally, make certain the new part has a new O-ring to prevent leakage. If not you might be have more problems down the road. All the ones I looked at (AutoZone and Pep Boys) came with the O-ring.
Everything that I've read on the subject suggests that this control is driven electronically. That is, the computer opens and closes the valve. Sludge buildup will cause it to stick open - it seems no one has one to stick closed. The computer uses proprietary software, which seems to be unavailable to small auto shops, and do-it-yourself people. The "fix" is to take the vehicle to a Ford shop, where they will re-program your computer, telling it to cycle that valve during driving, to prevent the build up of sludge. Since the air ports are located between the intake manifold and the valves, physically cleaning them would mean removing the manifold. Removing the manifold on an older car is little challenge to me. I hate working on these newer cars, with everything made of aluminum, and no room to get your hand into the small spaces, let a alone the tool necessary to turn the bolt. Perfect recipe for stripped bolts, and yet more expensive repairs. *Edit* You can also try looking at the hose that goes into the IMRC necause sometimes they can crack and that is a simple and cheap fix. I posted a link to a youtube video on locating the hose. Hope this helps someone =)both actuators share the same vacuum source so if one goes bad they both don't work, using a vacuum pump on each actuator will tell you witch one is bad, when they fail they stay open...there is a left and a right bank .if they both work with external vacuum check the hoses for manifold vacuum you have to plug one hose to check then the other