Question about 1999 Toyota Camry Solara

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O2 sensors keep failing and a evap leak code i put new gas cap did not cgehan ssomers11@gmail.com

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Are you sure it's 02 sensors? Just because code says 02 sensors doesn't necessarily mean they're bad. Bad 02 sensor code can also indicate bad cat. converter. If 02 sensors read exact same reading before and after converter they will trigger OBC to "sensor fault" - they should be reading 2 different readings. (Pre CAT/POST cat) I'd suggest replacing cat converter before replacing sensors.

Posted on Mar 14, 2011

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Why check engine light and code P0540 Large Evap Leak


did you reset codes after every repair ? is it a newer car ? there is a sensor in canister called a netural pressure vapor sensor they tend to leak or stick .causing evap codes , I chased the same code ,it would go out for about a week then come back in my case it was the new gas cap it was the wrong one for my car. it keeped building pressure in gas tank . and could hear it hissss when I would open it fuel up .

Aug 28, 2014 | Cars & Trucks

1 Answer

P1494 code


engine idle speeds, odd, hot? any real symptoms?

can be lots of things, the FSM covers it.
I think the ratio to real EVAP faILuers TO BAD CAP , IS LIKE 1000000:1 its so bad , new cars put , gas cap failure on dash !! display.
Give that fact, check cap first, and reset the ECU.
the EVAP system can be simple or hard.
Visual check the vacuum lines to all EVAP components
check all fuses.
then make sure gas cap is tight. (if cracked its no good) or a bad seal.
the reset the codes, using any scan tool. ($9 tool)
drive for a week see if it comes back, if comes back then its REAL.
if there is breach in the EVAP or bad VSV, (vacuum sol. valve)
then that takes the testing steps in the FSM.
or the EVAP system needs pressure testing, like they do
in all smog stations , at the cap.
if the leak down test fails, then you simply find that leak.
On can use any rubber tube held to the ear to hear a leak (after using a pressures source to the system.
if you have no tools, take it in. if DIY , buy them.
read the FSM. under this code, and the EVAP sections carefully.
there are 2 paths, it really is failing the EVAP or the OBD2 testing parts
are fibbing.
lots of guessing here, no tests...
http://www.jeepforum.com/forum/f11/engine-code-p1494-545078/


http://engine-codes.com/p1494_chrysler.html

Purpose
the EVAP system , keeps gas fumes from polluting the air we breath.
it seals the tank vents and burns off all fumes as you drive.
that is what it does.
and is tested, all the time by the OBD2 system.
its very reliable in finding, any failure.
Your system fails the first step, it checks to see if the system
even holds pressure, and fails. the FSM explains how this
test is conducted, the steps and checks.


Cap issues?
my current jeep , the cap ratchet was dead. and would not get fully tight.
or the vacuum breaker inside is bad. (stuck open)
or the sealing ring is bad.
or someone put wrong cap on car.
or a locking cap that is wrong.
the cap holds pressure, and never a vacuum.
the vacuum breaker prevents fuel tank collapes (photos avail)

Dec 25, 2013 | 1999 Jeep Grand Cherokee

2 Answers

P1684 - 1683 - 0135 - 0442 - 0455 error codes


P1684
It is not a fault code per say, it only indicates the battery has been disconnected or went dead in the last 50 drive cycles I believe.
P1683
This code refers to the cruise control speed servo power circuit is open or shorted. The power comes through a normally-on contact in the brake light switch. Use a test light or voltmeter to measure the voltage on the yellow wire / red stripe on the switch. If it's there, measure on the dark blue wire / red stripe. If it's missing there, the switch is defective. The voltage should go to 0 volts there when the pedal is pressed.
The rest of the fault codes are as follows.

P0135 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Possible causes- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM) Help with thisTech notes The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem.

P0442 CHRYSLER - Evaporative Emission Control Small Leak Detected.
Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
P0455 CHRYSLER - EVAP System Large Leak.Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking Tech notes The P0455 it's a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.

Dec 04, 2012 | 2001 Chrysler Town & Country

2 Answers

What does the codes p0442,p0136 &p0141 mean on my 2001 ford taurus it failed inspection for these codes


P0442 FORD - Evaporative Emission System Leak Detected Small Leak

Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
P0136 - O2 Sensor Circuit Malfunction Bank 1 Sensor 2
Possible causes- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

P0141 FORD - O2 Heater Circuit Bank 1 Sensor 2

Possible causes- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)

Sep 27, 2012 | 2001 Ford Taurus

1 Answer

I have the code po442 on a 2004 toyota matrix xr


The O2 sensors have zip to do with this P0442 fault code, the fuel vapor recovery system components leaking (small leak) do. Here are the possibilities. The fuel cap is just one possible cause. This is a very hard problem to track down, I have never found any easy way to diagnose it that works every time. Sorry but a smoke test to locate the leak is most likely needed to find the leak, this smoke test requires specialized equip.
Possible causes of Evaporative emission control system code P0442 - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Jan 15, 2012 | Cars & Trucks

1 Answer

Codes 02 sensor or vac leak We got gas one day the next day the check engine light came on.. we had it scanned and it came back O2 or vac leak the guy at auto zone asked us if the gas cap was on.and we...


You should be able to get the exact code of the fault (DCTxxx). From this fault you should be able to determine if the problem is O2 related or Vacuum. To me it sounds like it is vacuum related, because the computer only performs a vacuum test periodically (it only does this at certain coolant and outdoor air temperatures). When these conditions are met, the computer performs a check and if it doesn't pass the check engine lit will eliminate. In order for the test to pass the computer monitors the vacuum created in the gas tank and if it doesn't hold over a certain time it flags the error. This is why you need to make sure the gas cap is tightened.

If the gas cap is not the problem, it is probably related to the EVAP system. This system has a valve which opens and closes to perform the test by the computer. I have cleaned a couple of these valves on the older Luminas and it solved the problem. Dealers will insist that you need to replace the valves or EVAP canister. As for the location, it is probably behind the drivers rear tire atleast it was on the older luminas.

Oct 21, 2011 | 2008 Chevrolet Impala

2 Answers

I have a 98 Ford Contour and these codes. - P0708, P0171, P0442


p0708 is transmission range sensor curcuit high output, p0171 is system to lean ( bank 1 ), p0442 is EVAP emission control leak ( small ).

Mar 20, 2011 | Ford Contour Cars & Trucks

1 Answer

I have engine code 443 saying slow response os sensor does this mean i have to replace the sensor this is on 1997 ford explorer truck. i also had a vapor leak code so i replace the gas cap will that solve...


Most likely if is going to be a bad o2 sensor, especially in a car that is from 97. About the vapor leak, it could be the gas cap, put it could be a leak anywhere in the EVAP system too. If you fill you gas tank with the car running it can set the same code, so it may not even have a problem at all. The best way to check an EVAP leak is with a smoke machine.

May 15, 2010 | 1997 Ford Explorer AWD

2 Answers

Chk engine light on. failed inspection for code 0455.


Oil level
coolant level
Also it could be a O2 sensor gone bad very common

Apr 10, 2009 | 1998 Volvo S70

6 Answers

CHECK ENGINE CODE P2187 SAYS SYSTEM TOO LEAN AT IDLE BANK 1


i had the same code, p2187. check to the left of the throttle body(side facing the front of the veh.
there are 2 vaccum hoses going into the intake. the larger one on top has a spring clip holding it and if you look under that you'll see a smaller one with a check valve. mine was disconnected. plugs in under the larger one.

Aug 12, 2008 | 2003 Mazda Mazda6

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