Why do I have 15v going to my cam position sensor. It should be 8v.

It is definitely a cam problem. Was your replacement cam sensor OEM Japanese Denso, Made in China or Made in Mexico? Never go cheap on sensors.

DTC P0348 stands for Camshaft Position Sensor "A" Circuit High Bank 2. This code triggers when the signal coming from the CMP sensor located in bank #1 is either missing or inconsistent. The CMP sensor measures the speed and position of the engine's camshaft.
Sep 29, 2023

P0348 Code: Camshaft Position Sensor "A" Circuit High Bank 2

..

Battery positive voltage (B+) is supplied through the LH underhood fuse block LCM/HDLP circuit breaker via CKT 242 (RED) at all times to the following components:
?€¢
Headlamp switch

?€¢
Lamp control module (LCM)

?€¢
Switch of the RH IP fuse block headlamp relay position J

When the headlamp switch is placed in the ON position, battery positive voltage (B+) is supplied via CKT 10 (YEL) to the coil of the headlamp relay position J. The coil is permanently grounded to G201 via CKT 1450 (BLK). The coil is energized and the contacts close providing battery positive voltage (B+) to the headlamp dimmer switch via CKT 1346 (LT BLU). When the headlamp dimmer switch is in the LOW position, battery positive voltage (B+) is supplied via CKT 12 (TAN) to the following components:
?€¢
Left low beam headlamp

?€¢
Right low beam headlamp The LCM provides battery positive voltage (B+) via CKT 1346 (LT BLU) through the headlamp dimmer switch to the headlamps under the following conditions:
?€¢
The ignition switch is in the RUN position.

?€¢
The ambient light sensor indicates darkness.

The lamp control module (LCM) monitors the ambient light conditions through the ambient light sensor. The ambient light sensor is a variable resistor whose resistance changes as the surrounding ambient light level changes. As the ambient light decreases, the resistance of the ambient light sensor increases. The LCM measures the resistance across the ambient light sensor and determines whether it is day or night.
Headlamps Inoperative - Low Beams (Oldsmobile)
This is a lengthy diagnostic flow chart .

1

Did you perform the headlights system check?
--
Go to Step 2
Go to Headlight System Check

2

1. Disconnect the lamp control module (LCM) connector C1.
2. Connect a DMM from the LCM connector C1 cavity E (RED) to ground.

Is the voltage within the specified range?
10-15V
Go to Step 3 yes
Go to Step 9 no

3

Use a test lamp in order to backprobe the headlamp switch connector from cavity D (RED) to ground.
Does the test lamp light?
--
Go to Step 4
Go to Step 10

4

1. Remove the headlamp relay position J from the RH IP fuse block.
2. Connect a DMM from the headlamp relay position J cavity 30 (RED) to ground.

Is the voltage within the specified range?
10-15V
Go to Step 5
Go to Step 11

5

1. Place the headlamp switch in the HEAD position.
2. Connect a DMM from the headlamp relay position J cavity 85 (YEL) to ground.

Is the voltage within the specified range?
10-15V
Go to Step 6 yes
Go to Step 12 no

6

Connect a DMM from the headlamp relay position J cavity 30 (RED) to cavity 86 (BLK).
Is the voltage within the specified range?
10-15V
Go to Step 7 yes
Go to Step 14 no

7

Connect a fused jumper from the headlamp relay position J cavity 30 (RED) to cavity 87 (LT BLU).
Do the low beam headlamps light?
--
Go to Step 15 yes
Go to Step 8 no

8

1. Leave the fused jumper in place.
2. Use a test lamp in order to backprobe the headlamp dimmer switch connector C202 from cavity C5 (LT BLU) to ground.

Does the test lamp light?
--
Go to Step 17 yes
Go to Step 16 no
Repair the open in CKT 242 (RED) between S201 and the LCM. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

10

Repair the open in CKT 242 (RED) between S201 and the headlamp switch. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

11

Repair the open in CKT 242 (RED) between S201 and the RH IP fuse block. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

12

Inspect for an open in CKT 10 (YEL) between the headlamp switch and the RH IP fuse block. Refer to Testing for Continuity in Wiring Systems.
Is CKT 10 OK?
--
Go to Step 13
Go to Step 19

13

Replace the headlamp switch. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console.
Is the repair complete?
--
Go to Headlight System Check
--

14

Repair the open in CKT 1450 (BLK) between the RH IP fuse block and S308. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

15

Replace the headlamp relay position J in the RH IP fuse block.
Is the repair complete?
--
Go to Headlight System Check
--

16

Repair the open in CKT 1346 (LT BLU) between the RH IP fuse block and the headlamp dimmer switch connector C202. Refer to

17

Inspect for an open in the CKT 12 (TAN) wiring between the headlamp dimmer switch connector C202 and S257. Refer to Testing for Continuity in Wiring Systems.
Is CKT 12 OK?
--
Go to Step 18
Go to Step 19

18

Replace the headlamp dimmer switch. Refer to Dimmer Switch Assembly - Disassemble - Off Vehicle and Dimmer Switch Assembly - Assemble - Off Vehicle in Steering and Column-Tilt.
Is the repair complete?
--
Go to Headlight System Check
--

19

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check

USA car or the Export?

tell me what CPS means. we dont use that name since 1990

no engine stated, so how would we answer such a questions.

4.0L or 4.7L or 5.7L ?engine.

my guess is the cam sensor? or the crank sensor?

CKP or CMP?



how often once a week, decade, ?

all parts on care fail repeatably say in 100 years

but my guess i means, inside 5 years, but what, do say.

clear facts make answers very easy.





my wild guess.

The Camshaft Position Sensor (CMP) on the 4.0L 6 cylinder engine is bolted to the top of the oil pump drive shaft assembly. The sensor and drive shaft assembly is located on the right side of the engine near the oil filter.

The Camshaft Position Sensor (CMP) on the 3.7L V6 engine is bolted to the front/top of the right cylinder head.

The Camshaft Position Sensor (CMP) on the 4.7L V-8 engine is bolted to the front/top of the right cylinder head.

The Camshaft Position Sensor (CMP) on the 5.7L V8 engine is located on right side of timing chain cover below alternator.



The Crankshaft Position Sensor (CKP) on the 4.0L 6 cylinder engine is mounted to the transmission bellhousing at the left/rear side of the engine block The CKP on the 3.7L, 4.7L and 5.7L engines is located at the left rear of the engine just above the starter motor.



now may guess based on those 2 sensors above.

the CAM SENSOR (in pure english) fails for heat.

all have a tendancy to fail for too much heat,

and for overheating the engine.



the closer it fits the the engine, the more likely it will fail. (heat)

some that fit to cam ends love to fail soon., heat.



failure mode 2 is overvoltage.

if the Alternator goes bad and overvoltage , in fact over 15v

any electronic part can fail, even light bulbs.

mode 3

using a pressure washer can wreck just about anything made.





mode 4

dropping it to the concrete,

you, others, or the shipper,



mode 5

a dumb ,mechanci , hot wired it and burned it up, or injured it. (called the walking wounded)



that pretty much covers it.

but what sensor exactly and what engine.

and how long did it last in months

g16a or b
the cam cog mark is at 12pm matching the same mark
at the back 12pm tins at rear of cam cog.
this mark is TDC #4 firing, number four.
pick 8v or 16v engine.
http://www.fixkick.com/t-belt/tbelt-index.html#Tbelt-main

documented 3 ways, by page new page, by FSM and by instruction sheet that came with all new belts (GATES)

the cam cog has 2 false marks, do no use them
use all E marks. 16v and see 8v for its false marks too.
1995 had 2 engines, 2 EFI and 2 heads. as an option.
fact. G16A or B.

PCM= Powertrain Control Module. It is the brains of the car, it reads the sensor in put from all sensors including the cam shaft position sensor

If you need further help, reach me via phone at https://www.6ya.com/expert/steven_a67ead41eb5fc62a

try the ignition control module in the distributor

DTC P1391 fault code is a loss of cam or crank signal to the eng computer; the most common problem is the crank (CKP) sensor goes bad.

Find the crank sensor connector, you'll see the sensor mounted to the bellhousing, it goes down into the housing and reads off the flexplate. When it acts up, unplug the connector. Check the voltage on the yellow wire, it should have 8v. Plug the sensor back in and recheck the voltage. If it drops out replace the sensor. Check for ground on the black/green wire. If this and the 8v are ok, put a paperclip into the backside of the connector on the third wire in the connector and contact the terminal. Put one voltmeter lead there, the other lead on chassis ground. turn the engine over slowly by hand and the voltage should toggle from 0-5v. If it doesn't, replace the sensor.

If sensors are new and wiring is good, you are looking at a computer failure. Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer. Thank you for using FixYa.

Jose.

TRY UNPLUGGING DISTRIBUTOR PICKUP CONNECTOR AND SEE IF 8V SUPPLY RETURNS..IF NOT,TRY UNPLUGGING VEHICLE SPEED SENSOR IN TRANS..THESE SHARE THE 8V SUPPLY CIRCUIT TO CRANK SENSOR ONE OF THEM MAY BE SHORTED..THERE IS NO GROUND TO ASD RELAY BECAUSE THE PCM MUST SEE CAM AND CRANK SIGNALS TO GROUND THE ASD RELAY..I HOPE THIS HELPS

YOU NEED TO CHECK DARK GREEN/ORANGE WIRE AT IGNITION COIL WHEN CRANKING ENGINE FOR POWER..IF NO POWER,SHUTDOWN RELAY IS NOT BEING ENERGIZED..THIS ENGINE ALSO HAS CAMSHAFT POSITION SENSOR ON END OF CYLINDER HEAD..ENGINE CONTROLLER NEEDS CAM AND CRANK SIGNALS TO ENERGIZE THE SHUTDOWN RELAY..UNPLUG CRANK SENSOR AND CHECK VOLTAGE ON ORANGE WIRE..SHOULD HAVE APPROX 8V..IF NOT..UNPLUG CAM SENSOR AND SEE IF 8V SUPPLY RETURNS..IF NO POWER TRY UNPLUGGING VEHICLE SPEED SENSOR LOCATED IN TRANS HOUSING WHERE RIGHT SIDE AXLE COMES OUT OF TRANS..IF 8V RETURNS..THE SPEED SENSOR IS SHORTED INTERNALLY..THESE 3 SENSORS SHARE THE SAME 8V SUPPLY CIRCUIT..WITH SPEED SENSOR UNPLUGGED,PLUG CRANK SENSOR BACK IN AND TRY TO START ENGINE..HAVE SEEN THIS SAME PROBLEM AT WORK RECENTLY

Crank Sensor: Passenger side of transmission just to right and above the differential cover. Has 3 wires:

Light Blue/Dark Blue stripe - Signal
Dark Red - 8v supply
Black/Light Blue stripe - Ground

If the car runs or cranks, you can test this sensor by first checking for power on RED wire with key ON. Should be 8-9.5 volts DC. Furthermore, connect a dwell meter to the signal wire by probing the back of the connector. Dwell reading should be 49-51%. If not, its likely bad.

If you remove the sensor, you MUST replace the paper spacer on the end of the sensor or you risk damaging the sensor or even the torque converter drive plate otherwise. Also make sure O-ring is in good shape and positioned properly.

Cam Sensor: Facing Engine, it is on the driver side timing case housing, on top of the round part, just to the right of the fuel rail pipe where there is a capped fuel valve.

Has 3 wires:

Tan/Yellow stripe - Signal
Dark Red - 8v supply
Black/Light Blue stripe - Ground

Testing is same as for Crank Sensor.