If you’re experiencing an illuminated Engine Light or Service Engine Soon Warning Light, it could be due to the automobile fault code u1421. This code indicates a problem with the Body Control Module (BCM) or its related components.
The cause could be a faulty BCM, an open or shorted BCM harness, a poor electrical connection in the BCM circuit, or a faulty Powertrain Control Module (PCM). The importance of repairing this issue lies in the fact that it can affect the proper functioning of various systems in your vehicle. The repair difficulty is moderate, with a repair time of 1.0.
To fix the issue, you should visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Unveiling U1421: Common Symptoms You Should Know
If you notice the Engine Light ON (or Service Engine Soon Warning Light), it could be due to the u1421 fault code.
Here are the symptoms to look out for:
- The automobile fault code u1421 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light.
Decoding U1421: Common Causes Of The Fault Code
The automobile fault code u1421 can be caused by a faulty BCM, BCM harness issues, poor BCM circuit connection, or a faulty PCM.
- The automobile fault code u1421 can be caused by a faulty Body Control Module (BCM).
- It can also be caused by an open or shorted Body Control Module (BCM) harness.
- Another cause can be a poor electrical connection in the Body Control Module (BCM) circuit.
- Lastly, a faulty Powertrain Control Module (PCM) can also cause this fault code.
Fix U1421: Simple Steps To Solve The Fault Code
To fix the u1421 automobile fault code, check the possible causes and inspect the related wiring harness and connectors for any damage or corrosion.
- To fix the automobile fault code u1421, first, check the possible causes listed above.
- Then, visually inspect the related wiring harness and connectors.
- Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
- This fix will take an estimated repair time of 1.0 hour.
Crunching The Numbers: U1421 Repair Cost & Complexity
The automobile fault code U1421 can be diagnosed and fixed within an estimated repair time of 1.0 hour.
The cost of repair is influenced by the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour.
Therefore, the total cost of fixing the U1421 fault code will depend on the hourly rate charged by the auto repair shop and the estimated repair time required to fix the issue.
Decoding U1421: Understanding Your Vehicle’s Steering Angle Sensor Fault
The U1421 fault code is related to the Body Control Module (BCM) and Powertrain Control Module (PCM) in automobiles. The BCM monitors the time the ignition is off or in accessory mode between key cycles and broadcasts the signal called Ignition Off Time (IOT) via the CANC Bus. The PCM saves the value from a previous key cycle into powerdown flash and compares it to the current value if certain conditions are met.
If the timer is stuck, a fault U1421 is set indicating an Implausible Ignition Key Off Time Receiv. The MIL light will be lit immediately. If the fault goes stored, the PCM turns off the MIL after 3 consecutive drive cycles.
The fault will set if the difference between two IOTs sent from the BCM to the PCM during two separate diagnostic decisions is less than 3 minutes for 5 consecutive decisions.
FAQ
If you’re experiencing the u1421 fault code, your engine light may be on. This could be due to a faulty Body Control Module (BCM), an open or shorted BCM harness, a poor electrical connection in the BCM circuit, or a faulty Powertrain Control Module (PCM). To fix the issue, check the possible causes listed above and visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
If you’re experiencing the u1421 fault code, which is indicated by the engine light or service engine soon warning light being on, there are a few things you can do to fix it. The possible causes include a faulty Body Control Module (BCM), an open or shorted BCM harness, a poor electrical connection in the BCM circuit, or a faulty Powertrain Control Module (PCM). To address these issues, you should visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
While a faulty Powertrain Control Module (PCM) can be a possible cause of the u1421 fault code, it is not a common one. The more likely culprits are a faulty Body Control Module (BCM), an open or shorted BCM harness, or a poor electrical connection in the BCM circuit. To fix the issue, it is recommended to visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.
Wrap Up
If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Body Control Module (BCM), BCM harness being open or shorted, BCM circuit poor electrical connection, or a faulty Powertrain Control Module (PCM).
Check the possible causes, inspect the wiring harness and connectors, and look for damaged components or corroded connector pins.
