"Check engine light" error codes po446, po442, po440???? - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 07-19-2006, 12:33 AM   #1 (permalink)
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"Check engine light" error codes po446, po442, po440????

I have a 2004 Scion xa and my check engine light came on for about a week (not the maintenance light) & I made an appointment with Toyota. the day before I went in the light came off. They checked it anyway, & it my report says:
"Had 3 evap codes. suspect gas cab was left loose. cleared codes." the codes were po446, po442, po440. my manual says the maintenance light comes on if my gas cap is loose. Toyota said my car's fine... but the warranty comes up in 3 months & so am wondering if anyone has experience in this.. or knows about the error codes. I am trying to research to see what the codes mean?
Any help would be very helpful!! Thanks .
~ Sera
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Old 07-19-2006, 02:42 PM   #2 (permalink)
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you might want to try calling Car Talk -the show on NPR...they might be able to help...or email them. Good luck!!
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Old 10-01-2006, 07:10 PM   #3 (permalink)
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It means your gas cap was loose, see it all the time
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Old 10-10-2006, 01:09 PM   #4 (permalink)
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http://www.troublecodes.net/Toyota/

P0100Mass Air Flow Circuit.
P0101Mass Air Flow Circuit Range/Performance.
P0105Manifold Absolute Pressure Circuit.
P0106MAP/BARO Circuit Range/Performance.
P0110Intake Air Temperature Circuit.
P0115Engine Coolant Temperature Circuit.
P0116Engine Coolant Temperature Range/Performance.
P0120Throttle Pedal Sensor Switch "A" Circuit.
P0121Throttle Pedal Sensor Switch "A" Circuit Range/Performance.
P0125Insufficient Coolant Temperature for Closed Loop Fuel Control.
P0130Heated Oxygen Sensor Circuit - Bank 1 Sensor 1.
P0133Heated Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1.
P0135Heated Oxygen Sensor Circuit - Bank 1 Sensor 1.
P0136Heated Oxygen Sensor Circuit - Bank 1 Sensor 2.
P0141Heated Oxygen Sensor Circuit - Bank 1 Sensor 2.
P0150Heated Oxygen Sensor Circuit - Bank 2 Sensor 1.
P0153Heated Oxygen Sensor Circuit Slow Response Bank 2 Sensor 1.
P0155Heated Oxygen Sensor Circuit - Bank 2 Sensor 1.
P0156Heated Oxygen Sensor Circuit - Bank 2 Sensor 2.
P0161Heated Oxygen Sensor Circuit - Bank 2 Sensor 2.
P0170Fuel Trim malfunction.
P0171System too Lean.
P0172System too Rich.
P0201Injector Circuit - Cyl. 1.
P0202Injector Circuit - Cyl. 2.
P0203Injector Circuit - Cyl. 3.
P0204Injector Circuit - Cyl. 4.
P0205Injector Circuit - Cyl. 5.
P0206Injector Circuit - Cyl. 6.
P0300Random Misfire.
P0301Misfire Detected - Cyl. 1.
P0302Misfire Detected - Cyl. 2.
P0303Misfire Detected - Cyl. 3.
P0304Misfire Detected - Cyl. 4.
P0305Misfire Detected - Cyl. 5.
P0306Misfire Detected - Cyl. 6.
P0325Knock Sensor 1 Circuit.
P0330Knock Sensor 2 Circuit.
P0335Crankshaft Position Sensor "A" Circuit.
P0336Crankshaft Position Sensor "A" Circuit Range/Performance.
P0340CMP Sensor Circuit malfunction.
P0385Crankshaft Position Sensor "B" NE2 Circuit.
P0401EGR Flow Insufficient.
P0402EGR Flow Excessive.
P0420Catalyst System Efficiency below Threshold.
P0430Catalyst System Efficiency below Threshold Bank 2.
P0440EVAP Control System.
P0441EVAP Control System Improper Purge Flow.
P0446EVAP Control System Vent Control.
P0450EVAP Control System Pressure Sensor.
P0451EVAP Control System Pressure Sensor Range/Performance.
P0500Vehicle Speed Sensor.
P0505Idle Speed Control System.
P0510Close Throttle Position Switch.
P1100BARO Sensor Circuit.
P1120Accelerator Pedal Position Sensor Circuit.
P1121Accelerator Pedal Position Sensor Range/Performance Problem.
P1125Throttle Control Motor Circuit.
P1126Magnetic Clutch Circuit.
P1127ETCS Actuator Power Source Circuit.
P1128Throttle Control Motor Lock.
P1129Electric Throttle Control System.
P1130Air-Fuel Sensor Circuit Range/Performance.
P1133Air-Fuel Sensor Circuit Response.
P1135Air-Fuel Sensor Heater Circuit Response.
P1150A/F Sensor Circuit Range/Performance.
P1153A/F Sensor Circuit Response.
P1155A/F Sensor Heater Circuit.
P1200Fuel Pump Relay Circuit.
P1300Igniter Circuit - No. 1.
P1310Igniter Circuit - No. 2.
P1335No Crankshaft Position Sensor Signal - Engine Running.
P1349VVT System.
P1400Sub-Throttle Position Sensor.
P1401Sub-Throttle Position Sensor Range/Performance Problem.
P1405Turbo Pressure Sensor Circuit.
P1406Turbo Pressure Sensor Range/Performance Problem.
P1410EGR Valve Position Sensor Circuit.
P1411EGR Valve Position Sensor Circuit Range/Performance.
P1500Starter Signal Circuit.
P1510Boost Pressure Control Circuit.
P1511Boost Pressure Low.
P1512Boost Pressure High.
P1520Stop Lamp Switch Signal.
P1565Cruise Control Main Switch Circuit.
P1600ECM.
P1605Knock Control CPU.
P1630Traction Control System.
P1633ECM.
P1652Idle Air Control Valve Control Circuit.
P1656OCV Circuit.
P1658Wastegate Valve Control Circuit.
P1661EGR Circuit.
P1662EGR by-pass Valve Control Circuit.
P1780Park/Neutral Switch.
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"Fools", said I, "You do not know, silence like a cancer grows.
Hear my words that I might teach you. Take my arms that I might reach you"
But my words, like silent raindrops fell, and echoed, in the wells of silence.....

Jason Johnston
Toyota/Scion of Des Moines
(800)342-7045

Last edited by HATEnFATE; 10-10-2006 at 01:14 PM.
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Old 12-23-2007, 10:26 AM   #5 (permalink)
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I don't see PO442 on the list. My wife brought her 2000 Camry V6 in due to the check engine light being on. Autozone came up with Code PO442. Could they be wrong? If it is the right code, is the purge/vent solenoid something I can change at home?
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Old 12-24-2007, 07:24 AM   #6 (permalink)
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Check your fuel cap. Chances are it needs to be replaced. It's pretty common.
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"Fools", said I, "You do not know, silence like a cancer grows.
Hear my words that I might teach you. Take my arms that I might reach you"
But my words, like silent raindrops fell, and echoed, in the wells of silence.....

Jason Johnston
Toyota/Scion of Des Moines
(800)342-7045
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Old 09-27-2008, 05:13 PM   #7 (permalink)
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Look out for Rust

Not a Scion, but a member of the Toyota family, my 98 Camry was getting intermittent Code PO446 indications which I would trouble shoot and then turn out the light to see if it worked. After a month or so, it would come back. Finally had to gas the thing up (it is my wife's car) and noticed all sorts of rust on the mouth of the gas tank filler. There was definitely enough there to affect the seal. Cleaned off the rust from the filler mouth and from the rubber seal on the cap and after a month, the check engine light is still out. Definitely an inexpensive fix. It looks like Toyota didn't figure that component needed plating.
I've noticed all sorts of Toyota products with recalcitrant problems in this area (Code PO446). The effect of rust on the filler mouth is the same as a bad or loose filler cap. I hope this info helps someone.
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Old 03-06-2009, 05:30 PM   #8 (permalink)
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check engine light P043E code

I have a 2006 Scion xA with 43K miles. My check engine light came on. The dealership told me that the P043E code popped up. They said that this means there is a leak in the charcoal cannister.

They said that my car is no longer under warranty and it would take 3 hours of labor to replace the part.
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Old 03-07-2009, 07:39 PM   #9 (permalink)
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ColchesterScion, Doublecheck that code. It should probably be one of the following codes:
P0440EVAP Control System.
P0441EVAP Control System Improper Purge Flow.
P0446EVAP Control System Vent Control.
P0450EVAP Control System Pressure Sensor.
P0451EVAP Control System Pressure Sensor Range/Performance.
The code you are reporting is missing a number. If it isn't readable on the report the Dealer gave you, give them a call.
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Old 03-09-2009, 07:32 AM   #10 (permalink)
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Quote:
Some 2006 model year Scion xA vehicles may exhibit M.I.L. “ON” with DTCs P043E,
P043F, P2401, P2402, and P2419 stored..........................All five DTCs MUST be present for this TSB to be applicable


This repair is covered under the Toyota Federal Emission Warranty. This warranty is in
effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle’s
in-service date.
Quote:
DTC--P043E--Evaporative Emission System Leak Detection Reference Orifice Low Flow
__________________
"Fools", said I, "You do not know, silence like a cancer grows.
Hear my words that I might teach you. Take my arms that I might reach you"
But my words, like silent raindrops fell, and echoed, in the wells of silence.....

Jason Johnston
Toyota/Scion of Des Moines
(800)342-7045

Last edited by HATEnFATE; 03-09-2009 at 07:34 AM.
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Old 04-12-2009, 10:31 PM   #11 (permalink)
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Don't overfill and make sure gas cap is on tight

Don't overfill with gas and make sure gas cap is on very tight at all times. I have an '01 Avalon and '03 Sienna, both with over 140K miles (great vehicles!) but they both will through up PO441, 442, 446 error codes along with VSC disabled and check engine idiot lights if the gas cap is loose. Disconnecting battery will reset (and delete) all error codes and clear the check engine light, VSC, etc. idiot lights on the dash.
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