last week I got another check engine light with p0301 & p0306, cylinder 1 & 6 misfire. i know little about the electronics, how would I be able to diagnose what the cause could be as far as an improper voltage? I change the TPS but still, could it be the ECM? Check the flow rate on the injectors to make sure they are similar to the factory ones.
I was going 20-30mph. I called the RAC out they have told me I have a ECU problem And the car has had it . Read also: Car Immobilizer: Basic Function and Bad Symptoms. Collections, deliveries and turnaround time are unaffected. Got a mercedes cla amg 45 and took it for polish shampoo. JavaScript is disabled. 2001 Mitsubishi Eclipse GS 4 cylinder 2.4L 215,000 miles, BTW I did get 2 IAC codes. (Here’s What Happens), 4 Symptoms of a Bad Diesel Glow Plug (and Replacement Cost), 8 Best Mechanic Tool Sets for the DIY Mechanic, Car Immobilizer: Basic Function and Bad Symptoms, https://www.club3g.com/threads/how-to-testing-iac-idle-air-control.140906/. I’d poke around a bit more, then check for the presence of fuel and spark when you crank it. I don’t know if Citroen would give me any compensation and wouldn’t know where to begin to ask? I don’t think the 2012 DS5 Hybrid is worth that much and what I worry about is that the hybrid batteries might also need replacing and this could all end up devastatingly costly.
My 2010 Toyota Corolla has a misfire in cylinder one.I have got new coils and my injectors are good.I have checked for a head gasket that is also good to.What could it be.The motor is a 1.8. It drives slowly with the gears not selecting. Is that normal?
I’m not sure about the fuel pressure. All you need to do is connect a voltmeter gauge to it.
a subaru specialist diagnosed a bad ecu and changed it. This electronic module is a built-in computer which your vehicle depends on for managing a variety of its systems and functions. If your vehicle uses OBD1 you can still scan for codes, but it’s done using a jumper wire between pins instead of a scan tool. I have 07 Yukon with a 5.3 in it. Then one day it just stopped. Most thermostats are mechanical devices, not really sensors. It’s hard to throw out too many ideas without more information. Plus also, I’m going to order a original set of 2 hole injectors for the truck to see if makes a difference as you said. So anyhow, I”m going to replace the ECM. I asked him what was the possible cause of the early ECU malfunction but he said he didn’t know as well. Took it to another mechanic who looked at it and told me he has no idea what’s wrong with it but doesn’t think its the ECM.
At that mileage, if it wasn’t damaged it is probably a manufacturing defect that should be covered under warranty. We had it checked and now we are getting a code related to voltage and the ecm. My audi a3 2011/2012 refuse to start and I changed the battery but the battery run down again so I tried jumping the vehicle and connected the plugs wrong and it sparked. The original injectors were, I think, 48-50psi to open and they were also a 2 hole injectors. ECU acting up do you think? And…cooling fans run at high speed from startup to 15 minutes after shut down even with cold engine and A/C off. The Service Stabilitrak code recently started going off, then the brake code and the ABS code, then all of a sudden that little car with the wrench inside came on and the car drove in safe mode. Replaced the ECU… same problem still exists. Even after I switched coil, plug and wire it would still misfire.
Checked the back pressure of the one cat and it was good. It idle is a little rough and has no power. I have a DS5 and it has cut out on me with only an inadequate 1 second warning of engine failure on 2 occasions over the past 2 year. Also AC/defroster is causing a drop in RPMs, even with a new IAC. Whenever a jump start is performed on your battery, you need to ensure that the jumper cables are attached properly. Which new part is causing the issue? I don’t like to change a bunch of parts at the same time because it often makes it really hard to troubleshoot when something goes wrong. IF that was the case, wouldn’t I had some indication from the slow corrosion process that things are not right i.e. Checked for actual spark… and that was good. If this is the case... well I know nothing about ECU's and wouldn't even know where to start, and the best part is that my bro doesn't even know the ECU that is in the car. Now, my temp gauge isn't working, and neither is my gas gauge. Open the hood and look for the fuse box, which is located near the passenger's side. The ECU fuse should be clearly marked on the outside of the fuse box cover or in the owner's manual. After changing all these parts a lot of the misfires went away and it did run better. When the ECU has any issues, it can cause all sorts of problems with the vehicle, and in some cases even render it undriveable. If you have no vacuum leaks, I would try cleaning the parts above and see if it helps any. There are lots of internal causes which could contribute toward this. What up people. Hey Sean, just an update… found remanufactured injectors and ECU at an affordable price.
Any idea where to start? One of these sensors is the override sensor which manages how many volts the ECU will receive. Thank you I will do that. Those can be very tricky to diagnose. 3.
Related: How to Clean Corroded Battery Terminals. However, what you may wonder about is why the ECU malfunctioned in the first place. It’s really hard to say without knowing the initial state of the van. Might not hurt to test the voltage received by each injector either. This helps a great deal with calculating the proper amount of air and fuel needed for the internal combustion process. Once all the cells are dead, the battery is considered dead and your entire vehicle won’t be able to function. Many vehicles have starters with their own sensors in them. lights, applications, sensors…?
You might consider pulling the injectors and either have them cleaned or tested to make sure they aren’t clogged, but since the misfires were across multiple cylinders I am more inclined to believe it is an issue with the fuel pressure regulator or fuel rail on bank 1.
That’s very strange. Check to make sure your multimeter is set correctly.
It is also often referred to as the PCM (powertrain control module) or ECM (engine control module).
Then all of a sudden the #6 misfire went away as 2 other misfires appeared. 14 months ago I was getting a check engine light and found the error code p0306, cylinder 6 misfire. If I were in your situation, I would start my troubleshooting at the very basics, assuming I had no info about the problem at all. Changed plugs and injectors and ran okay for a couple weeks then PO172 code comes up. Gauges and warning lights keep coming on. Transmission dropped out of gear and won’t go back into gear. Hi My Toyota corolla automatic developed a problem where the accelerator is not changing. from what you’ve listed here I’m guessing that the voltage is too much or too little and shorting out the ecu. They tried to jump start it (don’t know if smth stupid happened there, incorrect connections) and when I went there I air-sprayed at ECM cables and drops of water came out. Changed O2 sensors, MAF, fuel pressure regulator, ERG, and ECT. I’ve seen an ignition switch failure that triggered the airbag light, ABS light, check engine light, and stopped the power windows from working. The engine light won’t shut off. Try switching the spark plugs and injectors around and see if the problem follows them around. Are these ECU symptoms? I know very little about the swap that's what's causing the most problems, but I'm gonna start dig into the internals, fluids, tranny, and so on over the next few days to get her up and running perfectly. A/C will not turn on. I have an intermittent ECU problem that seems to happen mainly in the morning when the headlamps are on , any ideas ? It started while I let my foot off the throttle as I approached a stop light. If an overheating issue is left unchecked, it can cause a more serious problem such as blown head gaskets (assuming that’s not the root cause).
I am on the correct pins and following the instructions to the “t”. More diagnostic testing is needed before you can get an accurate repair estimate. Had the van towed. Thanks. 2. If you still have your original fuel pump, you could try switching back and checking the pressure to see if it’s similar. This site uses cookies to offer you a better browsing experience, by continuing to browse you agree to the use of cookies - find out more/change settings, Mon-Fri 9:00am-10:00pmInternational dial +44 1773 535638. ECM and PCM usually refer to the same module, but transmission computers (TCMs) are often separate. Any advice would be appreciated . Just google “diy smoke tester” and find one that works for you. How was the ECU identified as the root cause? Thank you for your help .
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