C1242 GMC Code - Pump Motor Circuit Open
Quick Answer
The system relay is energized when the ignition is ON. Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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
- C1242 GMC indicates Pump Motor Circuit Open.
- Common causes
- Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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 C1242 GMC Description
- Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events
- Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events
What are the Possible Causes of the DTC C1242 GMC?
- Faulty Brake Pressure Modulator Valve (BPMV)
- Brake Pressure Modulator Valve (BPMV) harness is open or shorted
- Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection
- Faulty Electronic Brake Control Module (EBCM)
How to Fix the DTC C1242 GMC?
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 C1242 GMC 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 C1242 GMC Code
1. What are the common symptoms of OBDII code C1242 GMC (Pump Motor Circuit Open)?
- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the vehicle's braking system.
2. What are the possible causes of OBDII code C1242 GMC (Pump Motor Circuit Open)?
- The code can be triggered by issues such as a faulty ABS pump motor, damaged wiring or connectors in the ABS system, or a blown fuse related to the ABS system.
3. How can I diagnose the cause of OBDII code C1242 GMC (Pump Motor Circuit Open)?
- Diagnosing the issue typically involves using a professional OBDII scanner to retrieve the specific fault codes, inspecting the ABS pump motor and related components for damage, and testing the electrical connections in the circuit.
4. Is it safe to drive my vehicle with OBDII code C1242 GMC (Pump Motor Circuit Open)?
- It is not recommended to drive the vehicle with this code present, as it can affect the performance of the ABS system and compromise overall braking effectiveness. It is best to address the issue promptly.
5. Can I repair OBDII code C1242 GMC (Pump Motor Circuit Open) myself?
- Repairing this code may require advanced knowledge and tools, so it is recommended to consult a professional mechanic or technician who specializes in ABS systems to properly diagnose and repair the issue.
6. How much does it typically cost to repair OBDII code C1242 GMC (Pump Motor Circuit Open)?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the ABS pump motor, repairing damaged wiring, or addressing other related components. Costs can range from a few hundred to over a thousand dollars.
7. Are there any temporary solutions for OBDII code C1242 GMC (Pump Motor Circuit Open)?
- Temporary solutions such as clearing the fault code with an OBDII scanner may temporarily turn off the warning light, but it is not a permanent fix and the underlying issue should still be addressed.
8. Can extreme weather conditions cause OBDII code C1242 GMC (Pump Motor Circuit Open) to trigger?
- Extreme weather conditions, particularly moisture and corrosion, can contribute to electrical issues in the ABS system and potentially lead to the triggering of this fault code.
9. What steps should I take if OBDII code C1242 GMC (Pump Motor Circuit Open) keeps recurring after repair?
- If the code keeps recurring after repair, it is advisable to recheck the ABS system components, wiring, and connections for any overlooked issues, or consult a professional for further diagnosis.
10. Does OBDII code C1242 GMC (Pump Motor Circuit Open) affect the overall drivability of the vehicle?
- While the vehicle may still be operable with this code present, the compromised ABS system can impact the vehicle's braking performance and safety, making it important to address the issue promptly.
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