C1242 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 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 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?
- 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?
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 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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Information for Specific Makes
- C1242 Buick — Pump Motor Circuit Open
- C1242 Cadillac — Pump Motor Circuit Open
- C1242 Chevrolet — Pump Motor Circuit Open
- C1242 Ford — Left Right Dump Valve Circuit Failure
- C1242 GMC — Pump Motor Circuit Open
- C1242 Lexus — IG2 Power Source Circuit
- C1242 Lincoln — Left Right Dump Valve Circuit Failure
- C1242 Mercury — Left Right Dump Valve Circuit Failure
- C1242 Pontiac — Pump Motor Circuit Open
- C1242 Saturn — Pump Motor Circuit Open
- C1242 Scion — IG2 Power Source Circuit
- C1242 Toyota — IG2 Power Source Circuit
Frequently Asked Questions about C1242 Code
1. What are the common symptoms of OBDII code C1242 (Pump Motor Circuit Open)?
- Common symptoms include the ABS warning light illuminated on the dashboard, loss of ABS functionality, and potential issues with the vehicle's braking system.
2. What can cause the OBDII code C1242 (Pump Motor Circuit Open) to trigger?
- Possible causes include damaged wiring or connectors in the ABS system, a faulty ABS pump motor, or a problem with the ABS control module.
3. How can I diagnose the OBDII code C1242 (Pump Motor Circuit Open) at home?
- You can start by inspecting the wiring and connectors in the ABS system for any visible damage. Checking the ABS fuse and relay, as well as performing a continuity test on the pump motor circuit, can also help diagnose the issue.
4. What are the repair options for OBDII code C1242 (Pump Motor Circuit Open)?
- Repair options may include repairing or replacing damaged wiring, connectors, or components in the ABS system, such as the pump motor or control module. In some cases, a professional diagnostic scan tool may be needed to reset the code after repairs.
5. Can driving with the OBDII code C1242 (Pump Motor Circuit Open) cause further damage to the vehicle?
- Continuing to drive with this code may lead to a loss of ABS functionality, which can affect the vehicle's braking performance and overall safety. It is recommended to address the issue promptly to prevent further damage.
6. How much does it typically cost to repair OBDII code C1242 (Pump Motor Circuit Open)?
- Repair costs can vary depending on the root cause of the issue and the extent of the damage. It's advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.
7. Can I reset the OBDII code C1242 (Pump Motor Circuit Open) by disconnecting the battery?
- Disconnecting the battery may clear the code temporarily, but it is not a recommended long-term solution. The underlying issue causing the code to trigger needs to be diagnosed and repaired to prevent it from recurring.
8. Is it safe to drive my vehicle with the OBDII code C1242 (Pump Motor Circuit Open)?
- It is not recommended to drive the vehicle with this code active, as it may compromise the ABS system's functionality and affect the vehicle's braking performance. Have the issue diagnosed and repaired as soon as possible.
9. Can extreme weather conditions cause the OBDII code C1242 (Pump Motor Circuit Open) to trigger?
- Extreme weather conditions, such as excessive heat or moisture, can potentially damage the wiring or components in the ABS system, leading to the code C1242. Ensuring the ABS system is properly sealed and protected can help prevent weather-related issues.
10. Will the OBDII code C1242 (Pump Motor Circuit Open) affect my vehicle's emissions or engine performance?
- This code typically relates to the ABS system and does not directly impact the vehicle's emissions or engine performance. However, addressing the issue promptly is still important for overall safety and functionality.
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