The OBD code P1240 for Chevrolet indicates an issue with Fuel Injector 7. This affects the fuel injection system.
Symptoms include the Engine Light being ON.
Causes may include a faulty Fuel Injector 7 or related wiring issues.
It is a moderate issue.
A possible fix is to inspect the wiring harness and connectors for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Chevrolet p1240 OBD Code
The vehicle may experience issues related to the exhaust gas recirculation system with fault code P1240.
- Symptoms: Engine Light ON.
- Reduced engine power message on the driver information center.
- Engine may run rough or stall at idle.
- Engine may hesitate or lack power during acceleration.
Causes of the Chevrolet p1240 OBD Code
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P1240 in Chevrolet indicates an issue with the generator L terminal circuit.
- P1240 can be caused by a Faulty Fuel Injector 7.
- A Fuel Injector 7 harness that is open or shorted.
- A Fuel Injector 7 circuit with a poor electrical connection.
Fixing Chevrolet Error Code p1240 Step By Step
Address the issue by inspecting the ECT sensor and its wiring for faults or damage.
- To fix Chevrolet OBDII code P1240, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the operation of the ETC (Electronic Throttle Control) system and ensure it is functioning correctly.
- If no issues are found with the wiring or ETC system, consider reprogramming or replacing the Electronic Throttle Control module as necessary.
Cost Of Fixing Chevrolet p1240 Fault Code
Diagnosing and repairing fault code P1240 on a Chevrolet may involve addressing issues with the generator lamp control circuit.
The cost to diagnose and fix a Chevrolet OBD code P1240 typically ranges from $75 to $150, based on a 1. 0hour estimated repair time.
Factors like shop rates and complexity can influence the final cost.
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Details of the Chevrolet p1240 OBD Code
Chevrolet fault code P1240 relates to the generator Lterminal circuit malfunction.
Chevrolet OBD code P1240 means the generator load sensor circuit malfunction.
This code is triggered by the ECM when it detects an issue with the generator load sensor circuit.
The generator load sensor is responsible for monitoring the electrical load on the generator to ensure proper charging system operation.
When this circuit malfunctions, it can lead to charging system issues and potentially cause the battery to not charge properly.
Mechanic’s Tech Notes
Detailed information on Chevrolet fault code P1240, including symptoms, causes, and diagnostic procedures.
To diagnose and fix OBDII code P1240 in a Chevrolet, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) using a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
This thorough inspection can help identify and resolve issues related to code P1240.
FAQ
Common symptoms of OBD code P1240 in a Chevrolet: Engine Light ON. Possible causes: Faulty Fuel Injector 7, open/shorted harness, poor electrical connection. Fix: Inspect wiring harness and connectors for damage.
OBD code P1240 in a Chevrolet is typically caused by a faulty Fuel Injector 7, open/shorted harness, or poor electrical connection. Inspect and repair as needed.
Diagnose and repair OBD code P1240 in a Chevrolet by checking Fuel Injector 7 and its wiring for faults. Inspect connectors for damage or corrosion.
Wrap Up
If your Chevrolet triggers OBD code P1240 and you notice erratic fuel gauge readings or issues with the fuel level sensor, it may be caused by a faulty fuel level sensor, damaged wiring in the fuel level sensor circuit, or a poor electrical connection at the sensor.
To address Chevrolet OBD code P1240, inspect the fuel level sensor and its wiring for any signs of damage or corrosion.
Test the sensor’s resistance and ensure proper electrical connections at the sensor and related components.
Replace the sensor if necessary to resolve the issue.
