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P2429 is a diagnostic trouble code (DTC) for "Exhaust Gas Temp Too High Bank 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
This DTC represents Exhaust Gas Temp Too High Bank 2, indicating that the issue is originating within the engine bank which does not contain cylinder 1.
Diesel, gasoline, and turbocharged vehicles are typically equipped with an exhaust gas temperature sensor located somewhere along the exhaust system. It is generally a two-wire, low-voltage sensor (typically five volts). When exhaust gases get hotter, resistance in the sensor drops, which increases the voltage signal being sent to the PCM (powertrain control module). This tells the PCM that the exhaust is too hot and triggers the fault code to set.
Possible reasons for this DTC include:
There may not be any signs of this fault other than the stored code and a lit Check Engine or Service Engine Soon light. Decreased fuel efficiency is also a possibility.
This diagnosis may involve the following steps:
One of the most frequent errors is to replace the oxygen sensor rather than the exhaust gas temperature sensor. This obviously will not solve the problem, and is one of the reasons it’s important to have the correct documentation for your vehicle’s system so that you can locate the appropriate part.
The seriousness of this DTC is dependent upon the reason for it setting. If it’s simply a sensor malfunction, no severe damage should occur, and you may not even notice the vehicle driving any differently. If, however, there is an underlying problem causing the engine to overheat, this could eventually have disastrous consequences. It’s crucial to get an accurate diagnosis so that you know exactly what you’re dealing with.
Fixing this fault code may include:
It’s important to know exactly where this sensor is in order to perform the diagnosis and repair. In diesel vehicles the sensor is usually situated near the diesel particulate filter. In gas-powered cars, it is typically found in the exhaust downpipe. If the vehicle is turbocharged, the sensor may be in the exhaust input pipe, located near the turbocharger.
If the vehicle has a high-performance aftermarket exhaust system which lacks a catalytic converter, you may be able to circumvent this DTC by installing a 2.5-ohm inline resistor between the signal and ground wires, leaving the sensor disconnected. If you choose to do so, however, you will need to check local, state, and federal laws to make sure your vehicle complies with emissions regulations.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.