Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means there's a problem with the part of the car that keeps the engine's air clean. It's like when a heater doesn't work because it's getting too much electricity.
The code indicates that the engine control module (ECM) has detected a high voltage condition in the crankcase ventilation heater relay circuit.
The crankcase ventilation heater is part of the system that prevents the buildup of ice in the crankcase ventilation system. A relay controls the power to this heater. The ECM monitors the voltage and current in this circuit to ensure it is operating correctly. A 'high' circuit condition suggests that there is more voltage than expected, which could be due to a short circuit or a faulty relay.
• Check engine light is on
• Possible engine performance issues
• Increased emissions
• Faulty crankcase ventilation heater relay
• Short circuit in the wiring
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the crankcase ventilation heater relay and wiring for damage.
• Test the relay for proper operation.
• Replace the crankcase ventilation heater relay if faulty.
• Repair or replace damaged wiring.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Ram 1500
• Regular maintenance checks
• Inspect wiring for damage
• Ensure proper relay function
Sensor Issue
• Get the vehicle checked by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle manufacturer for specific warranty coverage on emissions-related components.
This code has been observed in vehicles with high mileage or those exposed to harsh climates.
Moderate – It should be addressed soon to avoid potential engine performance issues.
Ignoring this issue may lead to increased emissions, which can be illegal and harmful to the environment.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The crankcase ventilation heater relay is typically located in the engine bay, near the fuse box.
Q: Can I drive with a P142A code?
A: It's not recommended to drive for long periods as it can lead to engine performance issues.
Q: How can I reset the check engine light?
A: You can use an OBD-II scanner to clear the code, but if the issue persists, the light will come back on.
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