U029E 2018 Chevrolet Silverado Code - Lost Communication with NOX Sensor Module 2 Malfunction
Quick Answer
The reductant system uses two Nitrogen Oxide (NOx) sensors to monitor the amount of NOx in the engine's exhaust gas. Common causes include Faulty Nitrogen Oxide (NOx) Sensor Module 2, Nitrogen Oxide Sensor Module 2 harness is open or shorted, Nitrogen Oxide Sensor Module 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U029E 2018 Chevrolet Silverado indicates Lost Communication with NOX Sensor Module 2 Malfunction.
- Common causes
- Common causes include Faulty Nitrogen Oxide (NOx) Sensor Module 2, Nitrogen Oxide Sensor Module 2 harness is open or shorted, Nitrogen Oxide Sensor Module 2 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U029E 2018 Chevrolet Silverado Description
Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust.
The ECM varies the amount of Diesel Exhaust Fluid (DEF) or reductant added by varying the reductant injector duty cycle in response to changes in engine exhaust out NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module.
What are the Possible Causes of the DTC U029E 2018 Chevrolet Silverado?
- Faulty Nitrogen Oxide (NOx) Sensor Module 2
- Nitrogen Oxide Sensor Module 2 harness is open or shorted
- Nitrogen Oxide Sensor Module 2 circuit poor electrical connection
How to Fix the DTC U029E 2018 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U029E 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U029E 2018 Chevrolet Silverado Code
1. What does the OBDII code U029E indicate on a 2018 Chevrolet Silverado?
The U029E code indicates a "Lost Communication with NOX Sensor Module 2 Malfunction" in the vehicle's onboard diagnostics system.
2. What are the common symptoms of a U029E code on a 2018 Chevrolet Silverado?
Common symptoms include the check engine light being illuminated, reduced engine performance, and potential issues with emissions control.
3. What are the possible causes of a U029E code on a 2018 Chevrolet Silverado?
Possible causes include faulty NOX sensor module 2, wiring issues, poor electrical connections, or a malfunctioning powertrain control module.
4. How can I diagnose a U029E code on my 2018 Chevrolet Silverado?
Diagnosis involves using an OBDII scanner to retrieve the code, checking the NOX sensor module 2 and associated wiring for damage, and verifying electrical connections.
5. Can a U029E code on a 2018 Chevrolet Silverado be fixed at home?
While simple issues like loose connections may be resolved at home, diagnosing and repairing more complex problems may require professional help or specialized tools.
6. What are the recommended repair steps for a U029E code on a 2018 Chevrolet Silverado?
Repair steps may involve repairing or replacing the NOX sensor module 2, inspecting and repairing wiring, ensuring proper electrical connections, and clearing the trouble code.
7. Is it safe to continue driving with a U029E code on a 2018 Chevrolet Silverado?
Continuing to drive with a U029E code may lead to reduced fuel efficiency, increased emissions, and potential damage to the vehicle's engine or emissions system.
8. How much does it cost to repair a U029E code on a 2018 Chevrolet Silverado?
Costs can vary depending on the specific issue causing the code, but repairs may range from a simple wiring fix to replacing the NOX sensor module, potentially costing a few hundred to a thousand dollars.
9. Can a U029E code reset itself on a 2018 Chevrolet Silverado?
In some cases, the code may clear itself after the underlying issue is resolved. However, it's recommended to use an OBDII scanner to clear the code manually after repairs.
10. Will a U029E code affect the vehicle's emissions testing on a 2018 Chevrolet Silverado?
Yes, a U029E code indicating a NOX sensor module malfunction can impact emissions, potentially causing the vehicle to fail emissions testing until the issue is resolved.
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