At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You didn't say what the make and model are, but if code 43 is a knock sensor issue I guess its a GM product.
Code 21 means the TPS voltage was too high, and code 43 means the knock sensor voltage was too high or too low.
Neither code would kill the engine. Just turn the warning light on.
If the throttle position sensor failed, you would get the effect of stalling on acceleration.
You may need to narrow down the possible causes to spark or fuel, and in the end it could be the engine computer. It could also be a relay or other electrical component.
Sounds like a high voltage ark through either through a crack in the distributor, or through a crack in the wires to it or near one of the spark plug boots. It probably will be visible as a blue spark at night. Otherwise you might just replace the cap and wires!
Had this problem with a work van. It ended up being a faulty part. Apparently these vans have a safety feature that if you get rear ended the fuel is shut off and stops feeding fuel to the engine. My safety feature was faulty. Its really scary when your vehicle stalls while your driving down the interstate! I have the feature disconnected at the dealership, but not before I was in a bad wreck. Not sure if this is it, but why not check it out.
I039 is a road sensing suspension problem, I042 is battery voltage too high. I would first try to clear the codes and try to figure out why the voltage is too high - often a faulty regulator in the generator.
You also seem to have a battery drain problem - something besides the keep-alive circuit is drawing it down. First check all lights (including trunk and under hood) and the rear air compressor when the car is turned off.
Road sensing problem could because of the high voltage, but could also be one of the height sensors at each wheel is detached or broken, or the RSS module has given up the ghost.
I went through this scenario while working in a toyota sienna a few months ago and it ended up being the battery. When battery supply voltage starts to drop the PCM will limit voltage to certain areas.
How have you determined that the alternator (generator) is working fine?
Whilst the engine is running you need to see if there is at least 12 volts (usually 13.5V) across the battery using a voltmeter or similar tool. Also, whilst the engine is running, what happens when you turn the headlights on? (Does the car stall or try to stall?) This would affect night driving using headlights.
Most importantly, you run the risk of damaging the diodes on the alternator whilst running the
engine with a flat or undercharged battery.
There is also a regulator that controls the voltage from the alternator.
have you checked all fuses, including engine fuses located under the bonnet?
×