Last Updated on September 16, 2022
You may be wondering how to check codes on a 2012 Jeep Grand Cherokee. Well, it’s easier than you think. Here are some quick fixes that can clear the check engine light. To begin, try turning the ignition on and off five times. This will clear the check engine light and scroll through the error codes that have been stored. If you do not see the error code you’re looking for, search for it on the Jeep website.
Checking for a shorted clock spring
A defective clock spring in a Jeep can make steering difficult, cause the airbag warning light to illuminate, or even be completely absent. A Crown Automotive Clock Spring is a popular replacement part and can be found in many Jeep models, including the 2012 Jeep Grand Cherokee. It helps keep steering wheel rotation, while maintaining electrical connections. If you suspect your clock spring is the problem, follow these steps to make sure it’s not something more serious.
Once you suspect a shorted clock spring, the next step is to check for other problems in the vehicle’s electrical system. If the clockspring is damaged, other system components may malfunction, such as the airbag warning light in the instrument cluster, buttons on the steering wheel, or the horn wire spiral. However, clocksprings are not expensive, and if you notice any of these symptoms, you should replace the clock spring right away.
The most common symptoms of a faulty clock spring are an airbag warning light or a malfunctioning steering wheel. However, other indicators include an inoperative horn or traction control warning light. Depending on the model, you can expect to spend anywhere from $50 to $500 on a replacement clock spring and labor. Some car models have the clock spring integrated into their steering wheel control modules, which can be costly to repair.
To determine if a faulty clock spring is the culprit, look at the wiring diagram of the system. It shows where the clock spring connects. It’s a common problem with the cruise-control system, so you need to check this component as well. If you’re not sure how to test the wiring, check if it’s connected to a cruise control connector.
Checking for an open or shorted condition in the governor pressure solenoid or relay circuits
If the voltage coming out of the governor pressure solenoid control circuit on the PCM is different from the voltage you expect, the fault is in the solenoid control circuit. In this situation, a hard fault will exist. The solenoid may be shorted or open, or the fault could be in the wiring or PCM. To diagnose a shorted or open solenoid, you should measure the resistance of the governor pressure solenoid.
If the resistance values are not within specs, replace the solenoid assembly. The governor pressure solenoid control circuit from the PCM connector to the transmission solenoid connector should be checked for a short to ground or voltage. Likewise, the Trans Control Relay output circuit should be checked for shorting or open condition. If the resistance is not within specifications, the solenoid or TCC should be replaced.
If an open or shorted condition is detected in the speed control vacuum and vent circuits, it is most likely that the oxygen sensor heater relay circuit has a problem. A similar situation can occur when the engine’s cooling fan control solenoid has a malfunction. However, in the most severe cases, this error can be a sign of a problem with the cooling system, which is also a sign of a fault elsewhere.
If the fault is in the regulator pressure solenoid or relay circuit, it is possible to isolate or repair the problem yourself by connecting the two circuits to each other. The relay is also a good place to replace worn or damaged parts. Its purpose is to control the d-c power circuit and prevent automatic re-closure of the circuit interrupter.
Checking for a faulty O2 sensor
If you’re experiencing poor acceleration and fuel economy, it could be due to a faulty oxygen sensor. You can easily replace the sensor without the need of taking your vehicle to a mechanic. Using a wrench, remove the old sensor and unscrew it. Next, apply anti-seize lubricant to the threads of the new sensor. Then, screw it back in place. Connect the sensor to the electrical plug.
The first sign of a faulty O2 sensor is rough idling. If this is ignored, the vehicle will continue to power on, but at a lower level than optimal. Eventually, the misfiring will get worse until the engine can’t sustain the rest of the pistons. As the engine age, the O2 sensor will begin to malfunction. It may also cause the vehicle to stall or run rough.
If your car exhibits these symptoms, you may need to replace the faulty O2 sensor. A defective sensor will damage the catalytic converter, causing a number of problems, including poor engine performance and excessive fuel consumption. If you suspect your car has a faulty O2 sensor, you should seek professional help right away to prevent costly repairs down the road. In addition to bad performance, a faulty sensor can also cause a foul odor from the exhaust.
If the O2 sensor is faulty, you’ll experience a number of problems including the check engine light. If the O2 sensor is the culprit, you can also replace the catalytic converter if necessary. To determine whether your vehicle has a faulty O2 sensor, you should check the diagnostic trouble codes in your car. The codes are located in the engine compartment under the dashboard.
If you’re looking for a solution to this problem, you can look for a plug-and-play replacement. Some sensors can be hard to get to and may even seize in place. Regardless of whether you opt for a plug-and-play replacement, it’s best to consult a professional mechanic before making any changes to your vehicle. You can even replace the entire sensor.
A faulty oxygen sensor can cause the Check Engine Light to illuminate and cause a poor fuel economy. If the problem is serious, your 2012 Jeep Grand Cherokee may start to stall, die, or run poorly. Even if you’ve never had any problems with your oxygen sensor before, you should take your car to a mechanic. If the problem is minor, the repair will be a snap!
If your car’s O2 sensor has a low voltage reading, you’re likely experiencing a faulty O2 sensor. This happens when the air-fuel mixture is too lean. In other cases, a faulty spark plug, vacuum leak, or a hose from the positive crankcase ventilation valve can cause a false low reading. The voltmeter reading should be around 200 mV or higher.
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Wendy Lee is a pop culture ninja who knows all the latest trends and gossip. She's also an animal lover, and will be friends with any creature that crosses her path. Wendy is an expert writer and can tackle any subject with ease. But most of all, she loves to travel - and she's not afraid to evangelize about it to anyone who'll listen! Wendy enjoys all kinds of Asian food and cultures, and she considers herself a bit of a ninja when it comes to eating spicy foods.