RX 300 with a raft of problems!

gemmia · September 3, 2020

Hi All, I'm brand new here and not sure if this post is int he right area so please forgive me if not. I used to own an RX300 (2003) that I gifted to my father when I moved on to a newer vehicle. The problem is when the RX has an issue it becomes my car again and that's the case as of this weekend! It appears to have a list of issues as long as my arm all point to an electrical issue but the problem is where to start, I'll list the symptoms and codes below:

Symptoms:

Radio comes on and tunes but has no audio - Sat Nav has audio

The instrument panel lights (not ignition) do not come on until the car is taken out of neutral

When drive or is selected both the drive and neutral lights light up for anything from 20 seconds to circa 60 seconds then drive only

It will stall out when shifting to reverse from drive or drive from neutral, will restart in park and be fine as long as it stays in drive or reverse.

Fault codes 1-8 I'm not sure if the sequence is relevant:

1)P0335 2)P0340 3)P0345 4)P0705 5)P0335 6)P0340 7)P0345 8)P0705

So basically 4 fault codes which if my modest reader is correct are:

Crankshaft Position sensor, Camshaft Position Sensor & Transmission Range Sensor.

I've been through all the fuses in the passenger bay and engine bay, they are all good

I should add that the car has an LPG conversion, originally in 2006 and then refreshed in 2014.

When in drive and running it pulls as it should and gives no issues, i.e. missing or stalling. Check engine and VSC lights are permanently on and fire back up moments after clearing the faults.

I'd appreciate any insight anyone might have as to whether one of these components could cause all these issues!

Thank in advance Dan