2001 S40 has the check engine light on

DPatNeely · Post by **DPatNeely** » 07 Feb 2009, 17:59

2001 S40 has the check engine light on and the following codes P101, PO171,PO200,PO301 and PO130

Post by **MadeInJapan** » 07 Feb 2009, 21:00

Welcome to MVS.
I do not find a P101...there's a number missing in there.
P0171: Long term fuel trim, upper limit.
P0200: most likely a signal fault with cylinder #1
P0301: misfire code
P0130: 02 circuit malfunction for front 02 sensor

Can you give us a little more information regarding what kind of maintenance, recent work, etc. your car has had? All point to something possibly electrical or some type of vacuum leak or possibly a fault with the MAF sensor.

DPatNeely · Post by **DPatNeely** » 08 Feb 2009, 14:23

In the last 2,000 miles the Dealer replaced the valve timming belt and replaced both ingition coils (they were cracked)

Post by **MadeInJapan** » 08 Feb 2009, 14:26

I would reset the codes and see if they come back. Sometimes dealers don't reset things after they work on our cars.

DPatNeely · Post by **DPatNeely** » 10 Feb 2009, 19:25

How do I reset the trouble codes?

Post by **MadeInJapan** » 10 Feb 2009, 20:10

Use of a scan tool or you could disconnect your battery for a few minutes (make sure you have your radio code).

DPatNeely · Post by **DPatNeely** » 13 Feb 2009, 05:39

I have reset the light now when I accelarate (in the turbo) in higher rpm the light flashes and car accelarates roughly (missing) but light will go off again at crusing speed

Post by **billofdurham** » 13 Feb 2009, 11:46

Your first code, P101, is probably P0101 which is the MAF/VAF sensor range possibly caused by an intake leak. This would cause misfiring on increased acceleration.

Bill.

DPatNeely · Post by **DPatNeely** » 14 Feb 2009, 20:37

Do you know a way to check for intake leaks maybe a spray that would cause the engine to idle faster when sprayed on the leak and sucked into the intake?

Post by **billofdurham** » 15 Feb 2009, 11:43

I spray water on the intake manifold joint with the engine idling and if the engine starts to die there is a leak.

Others spray carb cleaner and if the engine surges there is a leak.

Both work but the water is cheaper.

Bill.