How to replace 2000 Alero cmp sensor?

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A camshaft position (CMP) sensor is typically only used as a reference for sequential fuel injection into the cylinders by the powertrain control module (PCM). Technically speaking, the 2000 Honda Accord doesn't have a CMP sensor, rather a cylinder position sensor (CYP). This should not be confused with the crankshaft position sensor (CKP) which is primarily used for ignition timing. There are also two different engine options for the vehicle being the 2.3L 4-cylinder engine and the 3.0 V6 engine. Sensor locations will be different for each option so it's important to first identify which engine is in the vehicle. The CYP sensor for the 2.3L 4-cylinder engine is located inside the distributor and is not serviceable; the whole distributor would need to be replaced. The CYP sensor for the 3.0L V6 on the other hand is located behind the left camshaft pulley on the timing belt back cover and is a serviceable part. You can read more here: https://www.yourmechanic.com/article/how-to-replace-a-camshaft-position-sensor-by-mia-bevacqua

(1) Camshaft Position (CMP) Actuator Solenoid - Intake Bank 1
(2) Camshaft Position (CMP) Sensor - Intake Bank 1
(3) Camshaft Position (CMP) Sensor - Intake Bank 2
(4) Camshaft Position (CMP) Actuator Solenoid - Intake Bank 2
(5) Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 2
(6) Camshaft Position (CMP) Sensor - Exhaust Bank 2
(7) Generator
(8) A/C Compressor Clutch
(9) Camshaft Position (CMP) Actuator Solenoid - Exhaust Bank 1
(10) Camshaft Position (CMP) Sensor - Exhaust Bank 1

DTC P0340: Intake CMP Sensor Circuit
DTC P0341: Intake Camshaft Position (CMP) Sensor Performance
DTC P0365: Exhaust Camshaft Position (CMP) Sensor Circuit
DTC P0366: Exhaust Camshaft Position (CMP) Sensor Performance

The five volt reference circuit .

The 4X camshaft position (CMP) sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The CMP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the CMP sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 4 varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the CMP sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses CMP sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.
Do you know what the five volt reference circuit is .

How to check the 5v reference circuit for short to ground Cadillac

Before you replace a part you may or may not need . Why ? What code ? Does the vehicle run ? There has been a lot of confusion on these vehicles with variable valve timing , mixing up cam sensors with camshaft actuators
DTC P0008: Engine Position System Performance Bank 1

DTC P0009: Engine Position System Performance Bank 2
The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no longer referenced to top dead center (TDC).

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Observe the scan tool CMP Desired, Actual, and Angle Variance parameters before a DTC sets. This may help to isolate whether a condition is specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

DTC Descriptors
DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 1

DTC P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 1

DTC P0020: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 2

DTC P0023: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Bank 2

DTC P2088: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 1

DTC P2089: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage Bank 1

DTC P2090: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 1

DTC P2091: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage Bank 1

DTC P2092: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 2

DTC P2093: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage Bank 2

DTC P2094: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 2

DTC P2095: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage Bank 2
DTC P0341: Intake Camshaft Position (CMP) Sensor Performance Bank 1

DTC P0342: Intake Camshaft Position (CMP) Sensor Circuit Low Voltage Bank 1

DTC P0343: Intake Camshaft Position (CMP) Sensor Circuit High Voltage Bank 1

DTC P0346: Intake Camshaft Position (CMP) Sensor Performance Bank 2

DTC P0347: Intake Camshaft Position (CMP) Sensor Circuit Low Voltage Bank 2

DTC P0348: Intake Camshaft Position (CMP) Sensor Circuit High Voltage Bank 2

DTC P0366: Exhaust Camshaft Position (CMP) Sensor Performance Bank 1

DTC P0367: Exhaust Camshaft Position (CMP) Sensor Circuit Low Voltage Bank 1

DTC P0368: Exhaust Camshaft Position (CMP) Sensor Circuit High Voltage Bank 1

DTC P0391: Exhaust Camshaft Position (CMP) Sensor Performance Bank 2

DTC P0392: Exhaust Camshaft Position (CMP) Sensor Circuit Low Voltage Bank 2

DTC P0393: Exhaust Camshaft Position (CMP) Sensor Circuit High Voltage Bank 2
I'm sorry but when dealing with these problems your best bet is to take your vehicle to a qualified repair shop , I have never see a DIY'ER correct the problem with these , an in the end always end up taking it to the dealer .

Definition of Diagnostic Trouble Code P1345 Audi: Ignition Coil Power Output Stage 3 Short to Ground BMW: Misfire Cylinder 2 with Fuel Cut-Off Buick: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Cadillac: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Chevrolet: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Ford: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) GMC: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Isuzu: Crankshaft Position - Camshaft Position Correlation Kia: No SGC Signal (1.6L) Lexus: Variable Valve Timing / CMP Sensor Range / Performance Lincoln: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) Mazda: Cylinder Discrimination Signal (from CMP sensor) Mercury: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) Oldsmobile: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Pontiac: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Saturn: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Toyota: Variable Valve Timing / CMP Sensor Range / Performance Volkswagen: Ignition Coil Power Output Stage 3 Short to Ground

OBDII PO139

Possible causes
- Timing belt or chain stretched or jumped
- Faulty Camshaft Position (CMP) Sensor
- Camshaft Position (CMP) Sensor harness is open or shorted
- Camshaft Position (CMP) Sensor circuit poor electrical connection.

Read more: http://engine-codes.com/p1391_chrysler.html#ixzz3UeAhEMOH

You need Workshop / Garage to look at your problem , as it could be anything , so it's difficult to answer

Timing belt or chain stretched or jumped
- Faulty Camshaft Position (CMP) Sensor
- Camshaft Position (CMP) Sensor harness is open or shorted
- Camshaft Position (CMP) Sensor circuit poor electrical connection.

Read more: http://engine-codes.com/p1391_chrysler.html#ixzz3GJfh5IpX

Camshaft Position (CMP) Sensor

• 3.0L (VIN S) ENGINE
• 3.0L (VIN U, 2) ENGINES

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3.0L (VIN S) Engine

Front of the engine attached to the forward cylinder head.

3.0L (VIN U, 2) Engines

Ford Sable, Taurus 2000-05
Camshaft Position Sensor

• DESCRIPTION & OPERATION
• REMOVAL & INSTALLATION
• TESTING

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Description & Operation

The Camshaft Position Sensor (CMP) is a variable reluctance sensor that is triggered by a high point on the left-hand exhaust camshaft sprocket. The CMP sends a signal relating camshaft position back to the PCM which is used by the PCM to control engine timing.
The CMP sensor detects the position of the camshaft. The CMP sensor identifies when piston No. 1 is on its compression stroke. A signal is then sent to the PCM and used for synchronizing the sequential firing of the fuel injectors. Coil-on-plug (COP) ignition applications use the CMP signal to select the proper ignition coil to fire. The input circuit to the PCM is referred to as the CMP input or circuit. DTC P0340 is associated with this sensor.

Removal & Installation

3.0L (VIN S) Engine

1. Before servicing the vehicle, refer to the Precautions section.
2. Disconnect the battery ground cable.
3. Remove the electrical connector.
4. Remove the bolt and the CMP sensor.
5. To install, reverse the removal procedure.
   
   

   Fig. Camshaft Position Sensor-3.0L (VIN S) Engine
   

3.0L (VIN U, 2) Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Disconnect the battery ground cable.
3. Remove the pin-type retainers and remove the accelerator cable snow shield.
4. Detach the spark plug wire retainer.
5. Detach the wiring harness from the intake manifold support.
6. Release the fuel charging wiring harness from the valve cover studs. Position the wiring harness away from the camshaft position sensor.
7. Disconnect the electrical connector.
8. Remove the screws and the CMP.
9. To install, reverse the removal procedure.
   NOTE Make sure that the fuel charging wiring harness is fully secured to the valve cover studs.
   

Testing

Fig. Testing the CMP sensor for voltage as the engine is running

Fig. Testing the VPWR circuit of the CMP sensor

1. Check voltage between the camshaft position sensor terminals PWR GND and CID.
2. With engine running, voltage should be greater than 0.1 volt AC and vary with engine speed.
3. If voltage is not within specification, check for proper voltage at the VPWR terminal.
4. If VPWR voltage is greater than 10.5 volts, sensor may be faulty.

Fig. Camshaft Position Sensor Connector

1. Before servicing the vehicle, refer to the Precautions section.
   WARNING Use only a high-impedance multimeter, otherwise damage to the PCM and/or sensors can result.
   
2. With the key OFF , disconnect the CMP sensor harness connector.
3. Measure the resistance of the CMP sensor.
   
   3.0L Engine: 250-1000 ohms
   
4. If the resistance measured is outside the limits given, replace the CMP sensor.

At the rear of the engine between the cylinder banks.