Check engine light comes on 2006 altima 2.5

6. CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminal 14 and CKP sensor (POS) terminal 2.continuity should exist. Refer to Wiring Diagram. 3. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 7. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 7. CHECK CRANKSHAFT POSITION SENSOR (POS) Refer to EC-326, "Component Inspection" . OK or NG OK >> GO TO 8. NG >> Replace crankshaft position sensor (POS). 8. CHECK GEAR TOOTH Visually check for chipping signal plate gear tooth. OK or NG OK >> GO TO 9. NG >> Replace the signal plate. 9. CHECK INTERMITTENT INCIDENT Refer to EC-147, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . >> INSPECTION END Component Inspection UBS002UJ CRANKSHAFT POSITION SENSOR (POS) 1. Loosen the fixing bolt of the sensor. 2. Disconnect crankshaft position sensor (POS) harness connector. 3. Remove the sensor. 4. Visually check the sensor for chipping.

You have a fail exhaust converter on bank # 1

Google the PO420 code & read up

GM issued a bulletin in regards to this code being set. The 2006 Trailbazer was included in it. In some cases the engine has had to be replaced due to excessive crankshaft end play.

Here is the bulletin. I would suggest you contact GM. They are aware of this problem.
Good luck, & i hope this helps.

Subject:DTC P0014, P0017, and/or Belt Noise - Inspect Actuator Solenoid and Crank End Play - keywords bearing cam chirp damaged debris internal light metal P0106 phaser replacement run SES squeak thrust #PIP3693B - (04/04/2006)



Models:2005-2006 Buick Rainier 2005-2006 Chevrolet TrailBlazer 2005-2006 GMC Envoy 2005-2006 Saab 9-7x with 4.2L Engine (VIN S - RPO LL8)


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
On rare occasions, a rough idle may be encountered with a P0014 and/or P0017 DTC. Due to the rough idle, a P0106 DTC may be stored too. This concern may be due to debris in the camshaft actuator system, which may be caused by a missing camshaft actuator solenoid screen or a worn crankshaft thrust bearing. Typically, this is the result of a camshaft actuator solenoid concern. If this is due to a worn crankshaft thrust bearing, some customers may also comment on a drive belt noise.

Recommendation/Instructions:
If this concern is encountered, follow the SI diagnostics and repair as necessary. If the SI diagnostics do not isolate the cause of this concern, ensure that camshaft actuator solenoid screens 1, 2, and 3 are in place as shown below:




(1)Screen for Advance Pressure to Camshaft Actuator(2)Screen for Pressurized Oil from Oil Pump(3)Screen for ****** Pressure to Camshaft ActuatorIf any of these screens are missing, replace the camshaft actuator solenoid, change the engine oil and filter, and evaluate the concern.

If all these screens are present, measure the crankshaft end play to determine if it is within the specification of 0.0044" - 0.0153" (0.112 - 0.388 mm). Typically, if excessive crankshaft end play is causing this concern, it will be obviously out of specification by .050" or more. If crankshaft end play is within specification, replace the camshaft actuator solenoid.

If the crankshaft end play is obviously out of specification, inspect the engine block for damage due to contact with the crankshaft. If engine block damage is present, contact the PQC (Product Quality Center) at 1-866-654-7654 for engine replacement authorization.

If there is no engine block damage present, disassemble the engine and inspect the following components for damage due to thrust bearing debris in the engine oil: all bearings, all journals, all valvetrain components, all timing components, and the crankshaft

Then, estimate what it will cost to replace the oil pump, camshaft actuator solenoid, all damaged parts, and to completely disassemble the engine to thoroughly clean all of the cylinder head and engine block oil galleys with oil galley brushes and soapy water.

After the repair estimate is complete, estimate what it would cost to replace the engine and contact the PQC to review these estimates as outlined in 02-07-30-029F.

Important: On 2006 models with excessive crankshaft end play, please submit a field product report by following 02-00-89-002D.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.



GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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follow this link it shows a great pic of its location.
http://www.paulstravelpictures.com/Nissan-Altima-Camshaft-Crankshaft-Sensors/Altima-Crankshaft-Camshaft-Sensor-Replacement-038.html

I have a 1999 BMW 740 il My SES light came on so I hooked up my OBD code reader p0340 - Camshaft Position Sensor Circuit Malfunction is what came up. so I went to the BMW parts department and bought the Camshaft Position Sensor.
I Replaced the with the new. My SES light was still on so I hooked up the OBD reader again hoping it may reset my SES light but it didn't what did happen is the OBD reader came up with the same code (p0340 - Camshaft Position Sensor Circuit Malfunction) witch is what I just replaced. now I'm at a loss. I'm not sure how to reset my SES light and if I just replaced the Camshaft Position Sensor why dose it the OBD code p0340 still come up. Any suggestions?

P0016 Chrysler

Crankshaft -camshaft timing misalignment bank 1 sensor 1
- The pcm detects that the camshaft position is out of phase with the crankshaft position

Probable Cause[s]

1. Engine oil dirty or contaminated /Incorrect engine viscosity
2. Open or short circuit condition
3. Camshaft 1/1 position solenoid, camshaft phaser ,camshaft1/1 position sensor
4. Crankshaft position sensor ,crankshaft,tone wheel or flex plate
5. Camshaft,tone wheel or pulse ring

Camshaft and crankshaft sensors are common failures on these vehicles and will give you those symptoms. Camshaft sensor is fairly easy to change (right on top on side of head on drivers side)
Crankshaft sensor is buried on backside of engine way down on the bottom.

P0137--O2 Sensor Circuit Low Voltage-Bank 1 Sensor 2

P0139--O2 Sensor Circuit Slow Response-Bank 1 Sensor 2

P0152--O2 Sensor Circuit High Voltage-Bank 2 Sensor 1

P0300--Random Multiple Cylinder Misfire


I would suspect that the camshaft position sensor is bad. This is a quote from the tech manual:

The Powertrain Control Module (PCM) uses the camshaft position sensor to manage sequential fuel injection and as part of misfire diagnosis. The PCM constantly monitors the number of pulses on the signal circuit. The PCM compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the PCM receives an incorrect number of pulses, Diagnostic Trouble Codes (DTCs) should be stored in the PCM. Some PCM systems will then default to multi-port or "gang-fire" injector operation. The camshaft position sensor signal is required to sequence the injector operation to the proper cylinder timing. If the camshaft position sensor or circuit is faulty, most engines will start. However, the PCM misfire diagnostic will likely be affected.



The part costs $50.....simple to change. It is NOT the O2 sensors so don't go wasting money on those. They are being affected due to related symptoms....they fault because the problem is happening upstream.

Maybe oil or coolant leaking on it shorting it out! Good Luck!!!!

MAke sure you replaced the right sensor and it's the proper design.(If you bought a generic part, it;s probably the wrong thing) I replaced my cam and crank sensors with the generic ones from AutoZone and they had no effect. Took it to Nissan, they replaced both at my expense, AND REPROGRAMMED THE ECU. That fixed that problem SES light hasn;t come on in 6 months....Fingers crossed