Cadillac Owners Forum banner

1 - 3 of 3 Posts

·
Registered
2001 DTS
Joined
·
66 Posts
Discussion Starter #1
Two items on a '01 DTS with 80,000 miles.

About 6 months ago the code for a bad A.I.R. pump was displayed, 410. Had not gotten around to it when the engine started missing due to a bad coil cartridge on bank #2. After replacing the cartridge I cleared the codes and was puzzled when the 410 did not reappear. I concluded the ECU may have interpreted an intermittent miss from a failing coil as a bad secondary air pump and left it at that. Thoughts?

Secondly, while on a trip last week The check engine light illuminated again and I thought for sure it was 410 again. Nope. It was the following two codes.

P0340 - Camshaft Position (CMP) Sensor Circuit
U1016 - Loss of Communications with PCM

I cleared them and 340 reappeared the next day. I cleared it again and it has not come back since. That was a week ago.

The car runs fine but I wanted to check with the community to see if I may just have a loose connection somewhere with the PCM or if there is something else going on perhaps like a failing cam sensor.

As always, thanks in advance.

-Brian
 

·
Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
·
71,064 Posts
The CaMshaft Position sensor (CMP) is not a usual failure suspect. Not saying it won't fail, just not common. It's down low on the drive belt face of the rear cam cover, held in by a 10mm bolt into a small flat retainer tab. The location is tight so replacement and connector removal call for magic words. Try cleaning the connector first - if that doesn't take care of the DTC, get a new sensor from www.rockauto.com or call Luke in Parts at Lindsay Cadillac over there >>>>>>> M-F, 9-5 EDT.

If the sensor fails it will default the ignition timing to a set, small advance figure in order to prevent engine damage. Performance and gas mileage will suffer.
 

·
Registered
'03 STS 122K, '01 STS 161K - 3/3/11
Joined
·
671 Posts
P0340 - Camshaft Position (CMP) Sensor Circuit
I think "Circuit" usually means a wiring/connector issue. With it being intermittent, it may be hard to find the problem. I would pull the connector, clean with electrical connector cleaner, and make sure the connection was solid when I put it back together. If that doesnt work I would start checking wires.
 
1 - 3 of 3 Posts
Top