P0341

DTC P0341

Circuit Description

The intake camshaft position (CMP) sensor produces a 1X signal for each revolution of the intake camshaft. This signal is used for startability. If the powertrain control module (PCM) does not receive a crankshaft position (CKP) sensor signal, the engine should still start based on the information from the CAM sensors. The CMP is connected directly to the PCM and consists of the following circuits:

* The 12-volt reference circuit
* The low reference circuit
* The CMP sensor signal circuit

If the PCM receives an incorrect number of CMP sensor pulses in a given number of CKP sensor pulses, DTC P0341 will set.

The PCM runs two tests to diagnose the CMP sensor performance system. It uses a Near Engine Start, CMP Fast Event Based, test and an After Engine Start, CMP Slow Event Based, test. The Near Engine Start, CMP Fast Event Based, test runs first upon or during start-up. If the test fails, it will set DTC P0341. If the test passes, it will initiate the After Engine Start, CMP Slow Event Based, test and runs this test continuously unless it detects an error and sets DTC P0341.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0341 Intake Camshaft Position (CMP) Sensor Performance

Conditions for Running the DTC

Near Engine Start (CMP Fast Event Based) Test
* The engine is cranking.
* The medium resolution is less than or equal to 10 counts.
* DTC P0340 is not set.

After Engine Start (CMP Slow Event Based) Test
* The engine is running.
* DTCs P0335, P0336, and P0340 are not set.
* DTC P0341 runs continuously when the above conditions are met.

Conditions for Setting the DTC

Near Engine Start (CMP Fast Event Based) Test

The PCM detects the incorrect number of CMP sensor pulses in 2 revolutions of the crankshaft, which is usually within one second.

After Engine Start (CMP Slow Event Based) Test

The PCM detects the incorrect number of CMP sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.

Action Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will illuminate after 2 consecutive ignition cycles in which the diagnostic runs with the malfunction present.
* The PCM will record the operating conditions at the time that the diagnostic fails. The Freeze Frame and Failure Records buffers will store this information.
* A history DTC stores.

Conditions for Clearing the MIL/DTC

* The MIL will turn OFF after 3 consecutive ignition cycles in which the diagnostic runs without a fault.
* A history DTC will clear after 40 consecutive warm up cycles without a fault.
* A scan tool can clear the DTCs.

Test Description

Step 1 - Step 9:

Step 10 - Step 11:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the condition is present.
5. This step detects if there is electromagnetic interference (EMI) on the CMP sensor circuits.