Check Engine Light

Trouble code P0842 means:Transmission fluid pressure sensor/switch "A" circuit low

A low washer sensor light indicates that the windshield washer fluid level in your vehicle is low. This warning alerts you to refill the washer fluid reservoir to ensure optimal visibility while driving, especially in adverse weather conditions. Ignoring this warning can lead to difficulty in cleaning your windshield, potentially compromising safety. It's advisable to top up the washer fluid as soon as possible.

It is a condition when one or more cylinders on an engine does not fire properly and completely burn the fuel/air mixture. It can be caused by a defective spark plug, bad plug wire, defective fuel injector, burnt valve, cracked piston, blown head gasket, or cracked head.

The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.

a malfuntion has been detected

you can turn them off by disabling the automatic lights which is done by cutting the wire should be a grey wire on the back of the switch itself but i'd get a diagram to find out which color wire is the right one instead of cutting the wire you can you can pull the emergency brake one click and light up the brake light in the cluster the lights will turn off.

Trouble code P0172 means:System too rich (Bank 1)

NO it does not. The check engine light comes on when the ECU detects a problem with the emissions system and has nothing whatsoever to do with the outside temperature.

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It won't go out unless you figure out whats causing it to come on. Most common is a faulty O2 sensor but could be a number of other components. Take it to Autozone or one of the common auto parts stores and have them scan it for the generic fault codes.

There are too many codes to list. You must get the code read at a service center to figure out what the problem is. The single most important thing to remember is that if a check engine light is flashing you must shut the vehicle down immediatley.Autozone reads codes for free.

A spark plug that doesnt fire or a coil that doesnt fire Try a new set of plugs and wires

This has to be done with a OBD2 scan tool. You might be able to get your local Auto Zone or Advanced Auto parts to do it. But different government agencies have been telling them not to do it. So you either have to buy the scan tool to do it, or pay to have someone else do it. Its cheaper probably to do it yourself. I think Auto Zone has a small hand held scanner tool for 50 bucks or so. Its the same tool they use to scan your car if you ask them too. Ask them to borrow it so you can reset your light, sometimes the let you do that too..

*** You may also try disconnecting the battery for around 20 minutes. That should reset the ECU also.. Nice and cheap*** If your vehicle still has a problem going on that its sensors find, it will still appear after a moment.

There are pages and pages of things that can turn the check engine light on. You need to have it checked for codes.

The main relay will give an check engine light to indicate that the electrical system is bad.

This has to be done with a OBD2 scan tool. You might be able to get your local Autozone or Advanced Auto parts to do it. But different government agencies have been telling them not to do it. So you either have to buy the scan tool to do it, or pay to have someone else do it. Its cheaper probly to do it yourself. I think AutoZone has a small hand held scanner tool for 50 bucks or so. Its the same tool they use to scan your car if you ask them too. Ask them to borrow it so you can reset your light, sometimes the let you do that too..

There are many possibilities why that light came on, too many to list here. Have your local auto parts store plug a code reader into your car to help narrow down the possibilities. They will perform this service at no cost.

To check codes on a Kenworth truck, you'll typically need to use an On-Board Diagnostics (OBD) scanner or a proprietary diagnostic tool like the Kenworth Datalink. Connect the scanner to the vehicle’s diagnostic port, usually located under the dashboard. Follow the scanner's prompts to retrieve any fault codes, which will help you identify issues with the truck's systems. Additionally, consult the owner's manual or service documentation for specific guidance related to your Kenworth model.

Yes, a mass air flow sensor is probably the number 1 cause of the check engine light in your car, as long as the engine is not running rough. But a couple other poss. are coil/spark plug wires (if the engine feels like it is running rough) front or rear oxygen sensors Evap leaks (gas cap not on tight) But besides that, that is about it for check engine light issues on your car, if you get me the code I can tell you exactally what to replace.

My 99 made a loud howling noise that seemed to come from the air cleaner. It was actually the Idle Air Control Valve(IAC)motor mounted on the right side of the throttle body. It is a silver cylinder mounted by two bolts and has an electrical connector on the end of the cylinder. It get gunked up with soot it is about $80 new. You can clean it with solvent, but it is only a temporary fix. Best replace it before it goes south. I would suspect the power steering pump. Check the P/S pump fluid level. If it is full, then listen carefully to the pump. If it is whining, it is bad.

Many possibilities. Plugs, plug wires, coil, ignition module, fuel injector, head gasket. Essentially anything that interfers with combustion on 2 or more cylinders.

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired

replace rear o2 sensor.