Diagnostic guide for P1345

Diagnostic Guide for P1345 - Crankshaft-Camshaft Position Correlation

The P1345 code indicates a correlation issue between the crankshaft and camshaft position sensors. This can lead to engine performance problems, including hard starting and stalling. The goal of this diagnostic guide is to identify the root cause of the issue and ensure proper timing and sensor functionality.

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Difficulty

Intermediate

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Estimated Time

30-60 Minutes

Estimated Diagnostic Cost

$0-$100

Typical shop charge to perform this diagnostic process. Repair parts and labor are not included.

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Tools Needed

OBDII scanner, multimeter, basic hand tools, timing light, service manual

Safety Notes

Ensure the engine is cool before working. Use caution when working around moving parts and electrical connections. Disconnect the battery when inspecting wiring.

Step 1

Check for Additional Codes

Instruction Using an OBDII scanner, check for any additional trouble codes that may be present.

Expected result Identify any related codes that could indicate further issues.

If Pass If no additional codes are found, proceed to the next step.

If Fail If additional codes are present, diagnose those codes first as they may provide insight into the P1345 issue.

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Step 2

Inspect Sensor Connections

Instruction Visually inspect the wiring and connectors for both the CKP and CMP sensors for any signs of damage or looseness.

Expected result Wiring and connectors should be intact and securely connected.

If Pass If the connections are secure and undamaged, proceed to the next step.

If Fail Repair or replace any damaged wiring or connectors found during inspection.

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Step 3

Check Sensor Output

Instruction Using a multimeter, measure the output voltage of both the CKP and CMP sensors while the engine is cranking.

Expected result Both sensors should produce a consistent voltage signal as specified in the service manual.

If Pass If both sensors are functioning correctly, proceed to the next step.

If Fail Replace the faulty sensor based on the output readings.

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Step 4

Verify Engine Timing

Instruction Remove the camshaft cover and check the alignment of the timing marks with the #1 cylinder at top dead center.

Expected result The timing marks should align correctly according to the specifications in the service manual.

If Pass If the timing is correct, proceed to the next step.

If Fail Adjust the timing as necessary to ensure proper alignment.

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Step 5

Inspect Cam Phaser Actuator

Instruction If the timing is correct, inspect the cam phaser actuator for proper operation and alignment.

Expected result The actuator should move freely and align with the timing specifications.

If Pass If the actuator is functioning properly, the issue may be resolved.

If Fail Consider replacing the cam phaser actuator sprocket if it is found to be faulty.

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Coddy can help with this step only. Tell me what you tested or what result you got.