Hi guys,
Maybe you can help me. I have a 2000 Landrover Discovery II with 79,000 miles on it. Recently the service engine light has come on then once I fill up the tank it will go off, then it comes on for a few days to few weeks and goes.

I recently had the oil and air filter changed, so I know it can't be that. I went over to Autozone today to have them run the codes and these are the 3 that popped up p159u, p1668 and p0153. They told me that the first to don't mean anything but that p0153 means oxygen sensors, fuel system running very rich or lean, engine misfire, fuel pressure very high or low fuel pump or pressure regulator.

Now I have never changed the oxygen sensor since we've owned the car, and we are the 2nd owners since 34,000 miles. How many oxygen sensors are there 1 or 2 on this vehicle and if this is the problem is this something that you can do yourself. Any help is greatly appreciated?

 

P1668 Engine anti-theft signal circuit high Serial link open circuit

P1590 ABS rough road signal circuit malfunction Hardware is OK, but SLABS ECU is sending an error

IMHO you are about to have more problems than just replacing the O2 sensors. Hopefully the non-O2 sensor codes can be cleared and not return. Immobilization and the 3 Amigos may be lurking.

 

Already have the 3 amigos on, so do you think po153 is oxygen sensor? And since the 3 amigos are on, what can p1668 possibly be?

 

The code info I posted was straight from the RAVE, you can search the whole book yourself with Adobe reader, in just seconds. P0153 indicates an O2 sensor is getting too old to perform correctly. 1668 related to wiring between the BCU and the ECU modules.