Buick Regal: DTC P0335 or P0336
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DTC P0335
Crankshaft Position Sensor Circuit
DTC P0336
Crankshaft Position Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The crankshaft position sensor circuits consist of an engine control module (ECM)
supplied 5 V
reference circuit, low reference circuit, and an output signal circuit. The
crankshaft position 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 58-tooth reluctor wheel on the
crankshaft. Each tooth on the
reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth for the
reference gap. The crankshaft
position sensor produces an ON/OFF DC voltage of varying frequency, with 58
output pulses per
crankshaft revolution. The frequency of the crankshaft position sensor output
depends on the velocity of
the crankshaft. The crankshaft position sensor sends a digital signal, which
represents an image of the
crankshaft reluctor wheel, to the ECM as each tooth on the wheel rotates past
the crankshaft position
sensor. The ECM uses each crankshaft position signal pulse to determine
crankshaft speed and decodes
the crankshaft reluctor wheel reference gap to identify crankshaft position.
This information is then used
to determine the optimum ignition and injection points of the engine. The ECM
also uses crankshaft
position sensor output information to determine the camshaft relative position
to the crankshaft, to
control camshaft phasing, and to detect cylinder misfire.
Conditions for Running the DTC
P0335 Condition 1
- DTCs P0101, P0102 and P0103 are not set.
OR
- The starter is engaged and the engine control module detects camshaft
position sensor pulses.
AND
- The airflow into the engine is greater than 1.5 g/s.
Condition 2
- The engine is running.
- The starter is not engaged.
Condition 3
- DTCs P0365 or P0366 are not set.
- The engine is running or the starter is engaged.
P0336 Condition 1
- DTCs P0335 is not set.
- The airflow into the engine is greater than 1.5 g/s.
- Engine speed is greater than 450 RPM.
Condition 2
- The engine is running.
- The starter is not engaged.
Condition 3
- DTCs P0101, P0102, and P0103 are not set.
- The airflow into the engine is greater than 1.5 g/s.
OR
- The starter is engaged and the engine control module detects camshaft
position sensor pulses.
Condition 4
- DTCs P0365 or P0366 are not set.
- The engine is running or the starter is engaged.
The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0335 Condition 1
The ECM does not detect a crankshaft position sensor pulse for greater than 4
s.
Condition 2
The ECM does not detect a crankshaft position sensor pulse for greater than
0.3 s.
Condition 3
The ECM does not detect a crankshaft position sensor pulse for 2 out of 10
engine revolutions.
P0336 Condition 1
The ECM detects that 10 or more crankshaft re-synchronizations have occurred
within 10 s.
Condition 2
The ECM does not detect the synchronization gap on the reluctor wheel for
greater than 0.4 s.
Condition 3
The ECM does not detect the synchronization gap on the reluctor wheel for 1.5
s after the starter was
engaged.
Condition 4
The ECM detects less than 51 or greater than 65 crankshaft position sensor
pulses during 1 engine
revolution for 8 out of 10 engine revolutions.
Action Taken When the DTC Sets
- DTCs P0335 and P0336 are Type B DTCs.
- The camshaft position sensor is used to determine engine position.
- The camshaft actuators are commanded to the parked position.
Conditions for Clearing the DTC
DTCs P0335 and P0336 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Wiring Schematics (LTG)
Connector End View Reference
Component Connector End View Index
Description and Operation
Electronic Ignition System Description
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify DTC P0651 is not set.
Refer to DTC P0641, P0651, P0697, P06A3, or P06D2.
- Go to next step: If the DTC is not set
3. Engine Running.
4. Verify the scan tool Crankshaft Position Active Counter parameter
increments.
- If the counter does not increment
Refer to Circuit/System Testing.
- Go to next step: If the counter increments
5. Verify the scan tool Crankshaft Position Resync Counter parameter displays
0 counts and the
engine does not stumble or stall while moving the related harness/connectors of
the B26
Crankshaft Position Sensor.
- If greater than 0 counts and the engine stumbles or stalls
Refer to Circuit/System Testing.
- Go to next step: If 0 counts and the engine does not stumble or stall
6. Operate the vehicle within the Conditions for Running the DTC. You may
also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records
data.
7. Verify the DTC does not set.
Refer to Circuit/System Testing.
- Go to next step: If the DTC does not set
8. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector
at the B26 Crankshaft
Position Sensor. It may take up to 2 minutes for all vehicle systems to power
down.
2. Test for less than 5 Ω between the low reference circuit terminal 2 and
ground.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module.
- Test for less than 2 Ω in the low reference circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If 2 Ω or less, replace the K20 Engine Control Module.
- Go to next step: If less than 5 Ω
3. Ignition ON.
4. Test for 4.8 - 5.2 V between the 5 V reference circuit terminal 1 and ground.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module.
- Test for infinite resistance between the 5 V reference circuit and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Go to next step: If infinite resistance
- Test for less than 2 Ω in the 5 V reference circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K20 Engine Control Module.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module,
ignition ON.
- Test for less than 1 V between the 5 V reference and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K20 Engine Control Module.
- Go to next step: If between 4.8 - 5.2 V
5. Test for 4.8 - 5.2 V between the signal circuit terminal 3 and ground.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module.
- Test for infinite resistance between the signal circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Go to next step: If infinite resistance
- Test for less than 2 Ω in the signal circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the K20 Engine Control Module.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module,
ignition ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K20 Engine Control Module.
- Go to next step: If between 4.8 - 5.2 V
6. Ignition OFF, connect a 3 A fused jumper wire to the signal circuit
terminal 3, ignition ON.
NOTE: Additional DTCs may set when performing this test.
7. Verify the scan tool Crankshaft Position Sensor Active Counter parameter
increments while
rapidly tapping the fused jumper wire end to ground.
- If the counter does not increment
Replace the K20 Engine Control Module.
- Go to next step: If the counter increments
8. Verify DTC P0336 is not set.
Inspect for the conditions listed below:
- Excessive play or looseness of the B26 Crankshaft Position Sensor or the
reluctor wheel
- Improper installation of the B26 Crankshaft Position Sensor
- Foreign material passing between the B26 Crankshaft Position Sensor and
the reluctor
wheel
- Damaged reluctor wheel
- Excessive air gap between the B26 Crankshaft Position Sensor and the
reluctor wheel
- Engine oil for debris
- Timing chain, tensioner, and sprockets for wear or damage
- If any of the conditions above are found, repair as necessary.
- If all components test normal, test or replace the B26 Crankshaft
Position Sensor.
- Go to next step: If the DTC is not set
9. Test or replace the B26 Crankshaft Position Sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Crankshaft Position Sensor Replacement
- Control Module References for engine control module replacement,
programming, and setup
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strate
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic
System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strate
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Special Tools
EL-38125-10 Splice Sleeve Crimping Tool (non GMNA)
J-38125-5A Ultra Torch Special Tool
J-38125-8 Splice Sleeve Crimping Tool (GMNA)
For equivalent regional tools, refer to Special Tools.
WARNING: In order to reduce the risk of personal injury, loss of high
voltage isolation
to gr
CAMBER DESCRIPTION
Camber is the tilting of the wheels from the vertical when viewed from the
front of the vehicle. When the
wheels tilt outward at the top, the camber is positive (+). When the wheel tilts
inward at the top, the camber
is negative (-). The amount of tilt is measured in degrees fr