strange ECU code
01-22-2002, 10:35 PM
#1
strange ECU code
Hey guys,
My Maxima has had trouble starting lately, the starter cranks for about 5 seconds and then the engine reluctantly starts..
The MIL is on, and the code is 0704 (EVAP control system pressure sensor) followed by 0215?? So, there are two codes, and the second code is 2 short flashes followed by FIFTEEN long ones..
I don't think 0215 is one of the valid codes, so does anybody have any ideas what this could be?
My Maxima has had trouble starting lately, the starter cranks for about 5 seconds and then the engine reluctantly starts..
The MIL is on, and the code is 0704 (EVAP control system pressure sensor) followed by 0215?? So, there are two codes, and the second code is 2 short flashes followed by FIFTEEN long ones..
I don't think 0215 is one of the valid codes, so does anybody have any ideas what this could be?
01-23-2002, 12:11 PM
#3
From the thread ABOVE..
http://forums.maxima.org/showthread.php?threadid=45274
DTC 0215
Diagnostic Trouble Code 0215 points to a problem with the EVAP Canister Vent Control Valve. EVAP = EVAPorative emissions control system. This is the system which seeks to minimize air pollution which results from evaporation (as opposed to incomplete combustion) of gasoline.
The EVAP CVCV is located on the EVAP canister (underneath the vehicle near the left rear tire) and is used to seal the canister vent. It has one hose connection and one two-wire electrical connector. The solenoid in the EVAP CVCV responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger then moves to seal the canister vent. The ability to seal the vent is a necessary part of the diagnosis algorithms for other evaporative loss system components. This solenoid valve is used only for diagnosis, and usually remains open. When the vent is closed, under normal purge conditions, the evaporative loss system is depressurized allowing "EVAP Control System (Small Leak)" diagnosis. Since this part is used only for brief emissions tests the vehicle will usually start and run well despite a Service Engine Soon warning light on the dashboard.
The malfunction is detected when the EVAP CVCV remains closed when it should be open. Possible causes include ...
- EVAP CVCV is defective
- EVAP control system pressure sensor and its circuit is faulty
- Blocked rubber tube to EVAP CVCV
- Water separator
- EVAP canister is saturated with water
The EVAP CVCV may be bench tested. Remove it from the vehicle (one hose, one connector, two bolts). Verify that air may pass freely through the valve. Then use a pair of fused test leads to apply 12 volts to the terminals to energize the solenoid. Verify that air does not pass freely through the valve. If the CVCV fails these tests, try cleaning it with WD-40 and compressed air. If this fails to free it up, replace the valve. When you install a CVCV (the original or a replacement) always use a new O-ring.
The EVAP canister may be removed from the vehicle and upended to drain accumulated water. If water drains out, weigh the canister. If the canister (with the EVAP CVCV attached) weighs more than 4.0 pounds, replace it.
DTC 0704
Diagnostic Trouble Code 0704 points to a problem with the Evaporative Emission Control System Pressure Sensor. The EVAPCSPS is installed in the purge line. The sensor detects the pressure inside the purge line and sends a signal to the Engine Control Module. The signal voltage is directly proportional to pressure. The EVAPCSPS is not directly used to control engine operating parameters. It is used only to evaluate EVAP performance. Therefore a car with DTC 0704 should start and run normally.
The EVAPCSPS is located on the underside of the car near the left rear wheel. It is mounted near, but not directly on, the EVAP canister.
This malfunction is detected when the EVAPCSPS sends an out-of-range voltage signal to the Engine Control Module. Possible causes include...
- harness or connectors (The EVAPCSPS circuit is open or shorted.)
- bad EVAPCSPS
- EVAP Canister Vent Control Valve is stuck open
- rubber hose connected to EVAPCSPS is clogged, bent, kinked, disconnected, or improperly connected
- EVAP Canister is damaged or saturated with water
- rubber hose from EVAP Canister Vent Control Valve to the water separator
- EVAP Canister Purge Volume Control Solenoid Valve
DTC 0215
Diagnostic Trouble Code 0215 points to a problem with the EVAP Canister Vent Control Valve. EVAP = EVAPorative emissions control system. This is the system which seeks to minimize air pollution which results from evaporation (as opposed to incomplete combustion) of gasoline.
The EVAP CVCV is located on the EVAP canister (underneath the vehicle near the left rear tire) and is used to seal the canister vent. It has one hose connection and one two-wire electrical connector. The solenoid in the EVAP CVCV responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger then moves to seal the canister vent. The ability to seal the vent is a necessary part of the diagnosis algorithms for other evaporative loss system components. This solenoid valve is used only for diagnosis, and usually remains open. When the vent is closed, under normal purge conditions, the evaporative loss system is depressurized allowing "EVAP Control System (Small Leak)" diagnosis. Since this part is used only for brief emissions tests the vehicle will usually start and run well despite a Service Engine Soon warning light on the dashboard.
The malfunction is detected when the EVAP CVCV remains closed when it should be open. Possible causes include ...
- EVAP CVCV is defective
- EVAP control system pressure sensor and its circuit is faulty
- Blocked rubber tube to EVAP CVCV
- Water separator
- EVAP canister is saturated with water
The EVAP CVCV may be bench tested. Remove it from the vehicle (one hose, one connector, two bolts). Verify that air may pass freely through the valve. Then use a pair of fused test leads to apply 12 volts to the terminals to energize the solenoid. Verify that air does not pass freely through the valve. If the CVCV fails these tests, try cleaning it with WD-40 and compressed air. If this fails to free it up, replace the valve. When you install a CVCV (the original or a replacement) always use a new O-ring.
The EVAP canister may be removed from the vehicle and upended to drain accumulated water. If water drains out, weigh the canister. If the canister (with the EVAP CVCV attached) weighs more than 4.0 pounds, replace it.
DTC 0704
Diagnostic Trouble Code 0704 points to a problem with the Evaporative Emission Control System Pressure Sensor. The EVAPCSPS is installed in the purge line. The sensor detects the pressure inside the purge line and sends a signal to the Engine Control Module. The signal voltage is directly proportional to pressure. The EVAPCSPS is not directly used to control engine operating parameters. It is used only to evaluate EVAP performance. Therefore a car with DTC 0704 should start and run normally.
The EVAPCSPS is located on the underside of the car near the left rear wheel. It is mounted near, but not directly on, the EVAP canister.
This malfunction is detected when the EVAPCSPS sends an out-of-range voltage signal to the Engine Control Module. Possible causes include...
- harness or connectors (The EVAPCSPS circuit is open or shorted.)
- bad EVAPCSPS
- EVAP Canister Vent Control Valve is stuck open
- rubber hose connected to EVAPCSPS is clogged, bent, kinked, disconnected, or improperly connected
- EVAP Canister is damaged or saturated with water
- rubber hose from EVAP Canister Vent Control Valve to the water separator
- EVAP Canister Purge Volume Control Solenoid Valve
01-23-2002, 01:48 PM
#5
Re: From the thread ABOVE..
Thanks for the reply..
I guess I'm blind, should have been able to find the code myself..
Anyway, has anybody had a similar problem with the EVAP canister before? It doesn't make sense that my car is hard to start with these two ECU codes... Should I try to take out the EVAP valve myself, or take it to the dealer? ANy suggestions are welcome, thank you.
I guess I'm blind, should have been able to find the code myself..
Anyway, has anybody had a similar problem with the EVAP canister before? It doesn't make sense that my car is hard to start with these two ECU codes... Should I try to take out the EVAP valve myself, or take it to the dealer? ANy suggestions are welcome, thank you.
01-23-2002, 02:03 PM
#6
Re: Re: From the thread ABOVE..
you really don't want me to search for you again do you?
http://forums.maxima.org/search.php?...der=descending
http://forums.maxima.org/search.php?...der=descending
Originally posted by spiff56747
Thanks for the reply..
I guess I'm blind, should have been able to find the code myself..
Anyway, has anybody had a similar problem with the EVAP canister before? It doesn't make sense that my car is hard to start with these two ECU codes... Should I try to take out the EVAP valve myself, or take it to the dealer? ANy suggestions are welcome, thank you.
Thanks for the reply..
I guess I'm blind, should have been able to find the code myself..
Anyway, has anybody had a similar problem with the EVAP canister before? It doesn't make sense that my car is hard to start with these two ECU codes... Should I try to take out the EVAP valve myself, or take it to the dealer? ANy suggestions are welcome, thank you.
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