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Old 04-02-2005, 05:18 PM   #1
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2008 Pontiac G8
 
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Default PO336 Crankshaft Position Sensor code...

I got this "Crankshaft Position Sensor A Cicuit, Range/Performance" code. I had that along with an O2 code (bank 1 - sensor 2, Low Voltage). The car runs fine though.

Any thoughts?
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Old 04-04-2005, 09:51 AM   #2
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Dont know if this will help you but here is how to diag a PO336

P0336 Diagnostic:


The Crankshaft Position Sensor is mounted in the right rear of the engine block behind the starter. The CKP sensor works in conjunction with a 24X reluctor wheel mounted on the rear of the crankshaft. The CKP sensor has a B+ power supply, a ground, and a signal circuit.

As the crankshaft rotates, the reluctor wheel teeth interrupt a magnetic field produced by a magnet within the sensor. The sensor's internal circuitry detects this and produces a signal which the PCM reads. The PCM uses this signal to accurately measure crankshaft velocity which is a variable used in order to detect misfire, and control spark and fueling.

Conditions for Running the DTC
The engine is operating.

Conditions for Setting the DTC
The PCM determines that the CKP sensor signal is out of range for less than 1 second.

Action Taken When the DTC Sets
The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Use a scan tool in order to clear the MIL and the DTC.
Diagnostic Aids

Important
Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.
For any test that requires probing the PCM or component harness connectors, use the J 35616-A connector test adapter kit. Using this kit prevents any damage to the harness connector terminals. Refer to Using Connector Test Adapters in Wiring Systems.

The following conditions may cause this DTC to set:

Poor connections: Refer to Testing for Intermittent and Poor Connections in Wiring Systems.
Crankshaft reluctor wheel damage or improper installation.
The sensor coming in contact with the reluctor wheel.
The engine running out of fuel.
If the crankshaft rotates backwards, this DTC will set. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.
Excess crankshaft end play causes the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:

A no start
A start and stall
Erratic performance
For an intermittent, refer to Symptoms .

Test Description
The numbers below refer to the step numbers on the diagnostic table.

This step verifies that the malfunction is present.

This step tests for EMI (Electro Magnetic Interference) on the CKP sensor circuits.

Vertical lines across the face of the sensor could indicate foreign materialpassing between the CKP sensor and the reluctor wheel. Non vertical lines across the face of the sensor may indicate a crack in the CKP sensor. Either of these conditions causes this DTC to set.

Damage to the reluctor wheel would affect the CKP sensor output. To inspect the reluctor wheel, removethe starter and rotate the crankshaftwhile viewing the reluctor wheelthrough the CKP sensor hole.If you cannot determineif the reluctor wheelis damaged, the oil panmay have to be removed.If this condition exist,refer toEngineMechanical for crankshaft replacement.

Step
Action
Value(s)
Yes
No

1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

2
Important: If DTC P0335 is also set, diagnose DTC P0335 before proceeding with this DTC.


Install a scan tool.
Idle the engine for 2 minutes.
Does the scan tool indicate that DTC P0336 failed this ignition?
--
Go to Step 3
Go to Diagnostic Aids

3
Visually/physically inspect all circuits going to the Crankshaft Position sensor for the following:
- Routed too close to secondary ignition wires or components

- Routed too close to after-market add on electrical equipment

- Routed too close to solenoids, relays and motors.

If you find incorrect routing, correct the harness routing.
Did you find and correct the condition?
--
Go to Step 9
Go to Step 4

4
Inspect for a poor connection at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
If you find a poor connection repair as necessary. Refer to Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?
--
Go to Step 9
Go to Step 5

5
Inspect for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
If you find a poor connection repair as necessary. Refer to Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?
--
Go to Step 9
Go to Step 6

6
Important: The CKP System Variation Learn Procedure must be preformed anytime the relationship between the CKP sensor and the CKP reluctor wheel is changed. Refer to CKP System Variation Learn Procedure .


Remove the CKP sensor. Refer to Crankshaft Position (CKP) Sensor Replacement .
Inspect the CKP sensor for signs of damage.
Is the CKP sensor damaged?
--
Go to Crankshaft and Bearings Removal in Engine Mechanical-5.7L
Go to Step 7

7
Inspect the crankshaft reluctor wheel for damage.

Is the reluctor wheel damaged?
--
Go to Crankshaft and Bearings Removal in Engine Mechanical-5.7L
Go to Step 8

8
Replace the CKP Sensor. Refer to Crankshaft Position (CKP) Sensor Replacement .
Perform the CKP System Variation Learn Procedure .
Is the action complete?
--
Go to Step 9
--

9
Select the Diagnostic Trouble Code (DTC) option and the Clear DTC option using the scan tool.
Idle the engine at the normal operating temperature.
Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
Operate vehicle within the Conditions for Running the DTC as specified in the supporting text, if applicable.
Does the scan tool indicate that this test ran and passed?
--
Go to Step 10
Go to Step 2

10
Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?
--
Go to the applicable DTC table
System OK
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Old 04-04-2005, 11:01 PM   #3
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Oh man, that's a ton of info. Thanks though. I think I found what I did to of caused that after reading through that.
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Old 04-05-2005, 12:13 AM   #4
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Quote:
Originally Posted by DMNSPD
Oh man, that's a ton of info. Thanks though. I think I found what I did to of caused that after reading through that.
Good deal!
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Old 04-05-2005, 12:13 AM
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