Question about 2005 Volvo S40

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Codes p0303/p0420/p0700 what mean that - 2005 Volvo S40

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  • Anonymous Dec 23, 2008

    problem in y car on volvo s40



    p0420

  • beelerj Feb 03, 2009

    I have a 2001 Volvo S40 giving me a P0700 code but the car seems to be performing fine. I have tried to reset the code but it keeps coming back after I start the car. Any suggestions so I can be sure it is repaired properly?

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P0420 Catalyst system below Efficiency Threshold (Bank1)
p0303 Cylinder 3 Misfire Detected
p0700 Transmission Control System Malfunction

Posted on Jan 17, 2009

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What means catalyst Efficiency below normal


      Got it scanned and it's P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8, 2011

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Jan 26, 2016 | Cars & Trucks

1 Answer

Codes po303, po171, po137. po420


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How to repair and fix fault or error code P0171 and reset warning light Toyota Corolla VVT-i engine. ... Also how to find fault codeusing OBD scanner. ... Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, ... 2000 Toyota Corolla, P0171 & P0420 codes - Duration: 5:43. by ...


Dec 02, 2015 | 2005 Toyota Corolla

1 Answer

Transmission down shifting to 2 code po 700 or but it does not shift to 3rd gear anymore was resetting it 1st time lasted a month then every 2 or 3 weeks now i can"t reset it anymore no codes


P0700 Transmission Control System Malfunction OBD-II Trouble Code Technical Description Article by Dale Toalston ASE Certified Technician Transmission Control System TCS Malfunction What does that mean? Many vehicles have a control module for the automatic transmission called a transmission control module (TCM). The engine control module (ECM) communicates with the TCM to monitor the automatic transmission for faults. If the TCM detects a fault in the automatic transmission and sets a transmission related fault code, the ECM is informed of this also and sets a P0700 in the ECM memory. This illuminates the Malfunction Indicator Lamp (MIL) to let the driver know there is a problem. If this code is present and the MIL (Malfunction Indicator Lamp) is illuminated that basically means there is at least one transmission code set in the TCM's memory. P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module. Symptoms Symptoms of a P0700 DTC may include: Malfunction Indicator Lamp (MIL) illumination The transmission may exhibit drivability problems like slipping, etc. Causes More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely). Possible Solutions For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission. If the TCM compatible scan tool will not communicate with the Transmission Control Module then that is a good indication that there may be a fault with the TCM itself. Register now to ask a question (free) Related P0700 DTC Discussions pt cruiser P0605, P0700, and P1391 What does P0605, P0700, and P1391 mean....I just put in a new catalyst on my car for smog but light engine turned back on...and I can't seem to know what is wrong ...please help me out here... 2002 Dodge Intrepid P0700 & P0841 code my code scanner come up with the codes PO700 and PO841. the 700 code i was told it was the input and output sensors.i had those changed a month and a haft a go. now they are back on and the po841 is on were is the 841 sensor located the machanic i go to tells me my transmission has to be replaced bu... ODB Codes Dodge Caravan 2005 P0700 and P0522 Hello I have a 2005 Dodge caravan and need a fix for these codes please.. P0700 and P0522 came up.. basically ths is stuck in limp mode or 2nd gear.. I am thinking I need a new Transmission Control module.. but can anyone confirm that... 2001 Honda Civic accord p0700 and p0740 Hi I went to get my Honda civic check and p0700 and p0740 codes came up the car has a lil leak But however the car is not slipping or anything. it's not showing no Transmission sign issues. I wanted to know what could possibly be the problem thanks you... 2005 Dodge Caravan P0700 and P0420 I have a 2005 Dodge Grand Caravan.The other day the check engine light came on.I stopped at auto parts store and they checked codes for me.P0700 and P0420 are the codes that came up.What do these mean and why did they show up?My van is running fine.Do I need a tuneup?Or is it something else?I am hop...

Read more at: http://www.obd-codes.com/p0700
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May 23, 2015 | 2006 Dodge Dakota

1 Answer

Error code p0420 and p0303


Code 303 is a miss or lack of power on cylinder 3. If you know for a fact that cylinder is getting spark it could be an injector problem.
Code 420 means the catalytic converter is not performing up to standard which could be several things including the miss on cyl 3.

Jan 30, 2014 | 2005 Chevrolet Trailblazer Ext

2 Answers

What do the codes P1684 and P0700 mean?


Hi Rich Stuck,P0700 means Transmission Control System (MIL Request),P1684 means Battery Disconnected within last 50 starts.More read Diagnostic Trouble Code Table ,hope it can help you.

Dec 08, 2012 | 2002 Chrysler PT Cruiser

3 Answers

Car began sputtering badly, like plugged fuel filter. Replaced but did not fix. Checked injectors by unplugging each one while car was running. Found that the far left one did not change when I unplugged...


Hi, have you tried swapping the ignition wires? If it isn't the injector or plugs, it may be the wire or the valves. If swapping wires doesn't work, run a compression test.

Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.


By the way, the code 420 may be caused by the misfire, so don't worry about that unless the code doesn't clear after fixing the misfire.

Apr 10, 2011 | Chevrolet Prizm Cars & Trucks

1 Answer

Getting P0420 code & P0303 code...why?


A code P0420 may mean that one or more of the following has happened:
  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Retarded spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible SolutionsSome suggested steps for troubleshooting a P0420 error code include:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2), replace if necessary
  • Replace the catalytic converter

Code p0303 means one cyliner is misfireing. Check spark plugs and wiring cables. If one cylinder isn't working good that could be the possible couse for the first code P0420 and all other engine problems.

Feb 25, 2011 | 2005 Isuzu Ascender

1 Answer

Scan tool read codes p0303 and p0420 mis firing cylindar 3 and catalyst effiency below threshold? how do i fix it


DO NOT ERASE THE CODES. There is Freeze Frame data that the technician may need to print off and attach to the Repair Order if it is covered under a CAMPAIGN. The misfire code P0303 relates to cylinder three not contributing. It could be a spark plug, ignition coil or an injector. I would check these items first before taking it to a dealer. There is also a campaign (RECALL) for the Power Valve (NTB05-058b) where the screws may have become loose. This is located inside the intake manifold.

The P0420 code could be a defective catalyst. The parameters for the catatytic converter may need to be widen through the ECM reprogram. It could also be one of the following bulletins or campaigns (RECALL): NTB09-046, NTB06-004b or CAMPAIGN NTB03-070b (R3007, R3014, R3015, R3016 & R3017). You will need to take the vehicle to a NISSAN dealer to verify if your vehicle is affected by these. Simply ask the service writer to check if your vehicle has any open campaigns. This is free. The bulletins may cost you.

Dec 20, 2009 | 2002 Nissan Altima

2 Answers

Chevy Blazer P0303 and P0420


Most probably and if a cat is not flowing proper is causes back preasure that can result in sticking or burned vavles,mechanic not nice by saying ignore the cat effiency code p0420.Can ussually have cat replaced at aftermarket muffler shop for approx. $200 cheaper than valve job or excessive fuel that you have used and damage that may occur to your engine.

Jun 16, 2009 | 1999 Chevrolet Blazer

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