Camshaft sensor access / code question - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-05-2006, 12:22 PM   #1
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Default Camshaft sensor access / code question

Hello, I was just wondering if someone can tell me how accessible the cam shaft sensor is on a 1992 Bonneville SE (not supercharged).

I've got a check engine light on, I had the codes read out at Advance and they came up with

Current and historical
Code 41 - Camshaft Sensor - Loss of Signal

and

History - Code 31 PRNDL Switch Circuit Problem.

The water pump was recently replaced, I understand this sensor is somewhere in this area.

Anyway, any pointers .. or is this something I should care about, the engine has been starting and running OK (considering it'* age).

211,000 miles so far

Thanks

Satsuke
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Old 04-05-2006, 02:08 PM   #2
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from what under yes and that sensor is kind of problem when they get some miles on them
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Old 04-05-2006, 02:15 PM   #3
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It could be that your sensor is fine. There could be a wiring problem, or the magnet in the timing gear could have broken loose. If the magnet is gone (you can determine that by using a large wrench to turn the crank until the magnet or the hole for the magnet appears in the hole left when you remove the sensor) you can stick one back in place with JB Weld.

http://www.bonnevilleclub.com/forum/...&highlight=cam
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Old 04-05-2006, 02:19 PM   #4
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Yes your sensor is a PITA to get to, but you need to address it as it will likely only get worse. At first, I would just check to make sure the connector wasn't jostled loose and that the wires are not damaged.

IIRC, the PCM will use default mode to run if the cam sensor or magnet isn't working right. This will cause decreased mileage, possibly power loss, and make your injector pulses be off timing a little. Read the link below and all it'* links too. It will help you, I'm sure.

Code 41 - Cam Sensor Circuit
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Old 04-05-2006, 02:37 PM   #5
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This sensor is NOT hard to change. I had to do it on a 94 Olds 88.

1. Remove passenger wheel
2. Remove passenger wheel well rubber shield
3. On the engine, at about 11:00 of the crankshaft pulley is a round sensor with a plug going into it. It'* held in with one screw.
4. Unscrew it.

That'* your Camshaft Position Sensor. It will have a large magnet on the backside. If I remember correctly, I paid $22 for a brand new Wells sensor in August.
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Old 04-05-2006, 02:42 PM   #6
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Thanks, Mark, for simplifying it for those of us that have not ever really done it.
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Old 04-05-2006, 04:26 PM   #7
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Sorry I'm late on this one.

Water pump was recently done eh? (sounds familiar to me)
With motor off...reach in under the left of the water pump pulley and feel around with your fingertips for the sensor and wiring to the cam.

Feels like loose wiring doesn't it?

Take your time and get it plugged back in.... you'll be fixed right up. I have no idea how it happened to me...but it did. Hoping yours is the same.
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Old 04-08-2006, 09:00 PM   #8
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The cam sensor isnt that hard to get to. I have the same car and got to mine from the top. I had the same code, changed the cam sensor, light came back on, changed the crank sensor, light again, finally changed the ICM and that did the trick. The sensors are on the same circuit. I was thrilled, because my next step was the timing chain, gears and a new magnet.

Good luck,
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Old 04-10-2006, 12:23 AM   #9
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Default cam sensor

just replaced mine a week ago jb weld and a drimil tool didn't take long, been working great every since

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Old 04-10-2006, 12:42 AM   #10
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What did you do with the dremel?
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