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Old 11-05-2006, 09:08 PM   #1
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Default Check engine light on

i put my H/F cat on today and i got a trouble code after i installed it

P1665 now on my scanner is says Fuel level output circuit and in tech info it says its a EVAP code
which is it?

any ideas on what i should do?
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Old 11-05-2006, 09:49 PM   #2
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did you have the second O2 sensor reinstalled or make sure that its connected.....
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Old 11-05-2006, 10:26 PM   #3
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DTC P1665 Evaporative Emission (EVAP) Vent Solenoid Control Circuit




Circuit Description
Output Driver Modules (ODMs) are used by the PCM to turn on many of the current-driven devices that are needed to control various engine and Transmission functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding ON. Unlike the Quad Driver Modules (QDMs) used in prior model years, ODMs have the capability of diagnosing each output circuit individually. DTC P1665 set indicates an improper voltage level has been detected on the output circuit which controls the EVAP Canister Vent Solenoid Valve.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
An improper voltage level has been detected on the output circuit which controls the EVAP Canister Vent Solenoid Valve.
The above conditions are present for at least 30 seconds.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame/Failure Records data.
Conditions for Clearing the MIL/DTC
The PCM will turn OFF the malfunction indicator lamp (MIL) during the third consecutive trip in which the diagnostic has 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 a scan tool.
Diagnostic Aids
Check for the following conditions:

Poor connection at the PCM. Inspect harness connectors for backed out terminals, 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 between the solenoid control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the solenoid. A change in voltage will indicate the location of the malfunction.
Review the Fail Records vehicle mileage since the diagnostic test last failed. This may help determine how often the condition that caused the DTC to be set occurs.

Test Description
The number(*) below refer to the step number(*) on the diagnostic table.

The powertrain OBD System Check prompts you to complete some basic checks and store the freeze frame and failure records data on the scan tool.

Listen for an audible click when the Vent solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.

Tests for voltage at the feed side of the solenoid.

Verifies that the PCM is providing ground to the solenoid.

Tests if ground is constantly being applied to the solenoid.

The PCM utilizes Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is replaced, the new PCM must be programmed.
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Old 11-06-2006, 12:06 AM   #4
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Quote:
Originally Posted by 1993 SLE
did you have the second O2 sensor reinstalled or make sure that its connected.....
i never disconnected it ill look at the wwires
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Old 11-07-2006, 07:30 PM   #5
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also i have a P1676 code

swap the purge solenoid?
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Old 11-07-2006, 09:44 PM   #6
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Please tell us what that references in Techinfo.
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