Thread: P1374 code

Any body ever delt with this code?

what did u do to fix it?

hmmm. has nobody had this code before? just replced the crankshaft position sensor in effort that it was my problem but the code reappeared. What other things could cause this code? could it be the cam sensor?

Searching ALLDATA Standby...

This is what i found for the code P1374 when I searched ALLDATAdiy

Good Luck!

Circuit Description

The 3X reference signal is produced by the ignition control module. The Ignition Control Module (ICM) calculates the 3X reference signal by dividing the Crankshaft Position (CKP) sensor 18X pulses by 3 when the engine is running and CKP sync pulses are also being received. The PCM uses the 3X reference signal to calculate engine rpm and crankshaft position at engine speeds above 1200 rpm. The PCM also uses the pulses on this circuit to initiate injector pulses. The PCM constantly monitors the number of pulses on the 3X reference circuit and compares the number of 3X reference pulses to the number of 18 X reference pulses and CAM signal pulses being received. If the PCM receives an incorrect number of pulses on the 3X reference circuit, DTC P1374 will set and the PCM will use the 18X reference signal circuit for fuel and ignition control. The engine will continue to start and run using the 1 8X reference and Camshaft Position PCM input signals only.

Conditions for Running the DTC

The engine has been running for longer than 3 seconds.

Conditions for Setting the DTC

* The ratio of 18X reference pulses to CAM signal pulses received by the PCM equals 36:1.
* The ratio of 1 8X reference pulses to 3X reference pulses received by the PCM does not equal 6:1.
* The conditions are present for greater than 10 seconds.

Action Taken When the DTC Sets

* The PCM will illuminate the MIL during the second consecutive trip in which the DTC test has run and failed.
* The PCM will use the 18X reference signal circuit for fuel and ignition control.
* If equipped with traction control, the PCM will command the Electronic Brake and Traction Control Module (EBTCM) via Class 2 serial data to turn OFF traction control, and the EBTCM will illuminate the TRACTION OFF lamp.
* The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.

Conditions for Clearing the MIL/DTC

* The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
* The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
* The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

Diagnostic Aids

An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation. Check for the following conditions:

* Poor connection. Inspect the PCM harness and connectors for improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
* Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the PCM, turn the ignition ON and observe a voltmeter connected to the 3X reference circuit at the PCM harness connector while moving connectors and wiring harnesses related to the ICM. A change in voltage will indicate the location of the malfunction.
* Malfunctioning Ignition Coil. Remove the ignition coils and inspect the ignition control module and coils for cracks, carbon tracking, or other signs that indicate that the coil secondary circuit is arcing to the ICM or ICM wiring harness.
* Secondary ignition wire(s) arcing to wiring harness. Check secondary ignition wires for carbon tracking or other signs of damage.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

10. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.

maybe this is a culprit. i took my coils off and where the bottom coil mounts on to the ICM, the part that sticks up with threads broke off. think that could be it?

It's a possibility. Could be that the ICM is focked. Hard telling... I've never really dealt with that part of the car.

here i got pictures of the stuff. so standby for a second while i upload them please

heres what i was talking about. i meant the icm bracket.







is this what is called "carbon tracking" on the prongs of the icm?

I can't view pictures from photo hosting websites at work... so i'm not sure man. I'll try to give it looksy when i get home around 8am.

please do man id much appreciate it if u have time to. ill be up screwin with the car some more.