P1402
FordEGR Metering Orifice Restricted
The EGR system routes a measured amount of exhaust gas back into the engine under selected operating conditions to reduce combustion temperatures and emissions. This code indicates the system detected a restriction at the EGR metering orifice. Carbon buildup or a problem with the parts that measure EGR flow can cause the same indication, so the code alone does not prove a particular part needs replacement.
⚠️ Before You Begin (Safety First)
This code alone usually does not require you to stop driving immediately. Arrange diagnosis soon, especially if the engine runs poorly or the check-engine light flashes. Stop driving if the engine stalls in traffic, loses power dangerously, or shows signs of overheating.
Common Symptoms
- The check-engine light may be on, with no obvious change in how the vehicle runs.
- Reduced EGR flow can contribute to increased combustion temperatures and emissions, and may cause pinging or spark knock under some driving conditions.
- Some vehicles may run roughly, hesitate, or lose performance if the EGR fault affects engine operation; symptoms depend on the vehicle and the underlying cause.
Common Causes
- Carbon or other deposits restricting the EGR metering orifice or connected passages.
- An EGR valve or passage problem preventing the expected exhaust-gas flow.
- A faulty EGR flow-monitoring sensor, damaged connection, or blocked, leaking, or deteriorated pressure hose that gives an incorrect flow indication.
- A wiring or connector fault affecting EGR flow monitoring.
Diagnostic Steps
- Record the stored codes and freeze-frame information before clearing anything; related codes and operating conditions can help distinguish a flow restriction from a monitoring fault.
- With the engine off and cool, visually inspect accessible EGR-related connectors and hoses for disconnection, damage, or deposits; use vehicle-specific service information to identify components.
- Do not force tools into passages or remove components without the correct procedure, since parts and access vary by engine. Have a technician inspect and test the EGR flow system if the restriction is not obvious.
When to Call a Professional
Confirm the code and review freeze-frame data, then check EGR flow and the pressure-feedback signals used to monitor it. Inspect the metering orifice and passages for carbon restriction, and check the EGR valve, sensor connections, and any pressure hoses for faults that could imitate restricted flow. Use service information for the exact model, year, and engine before testing or removing components.
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Commonly Asked Questions
Does P1402 prove the EGR valve is bad?
No. The code indicates a detected restriction at the EGR metering orifice. Carbon-blocked passages, flow-monitoring sensor or hose problems, and wiring faults can also cause the indication.
Can I keep driving with P1402?
Often the vehicle remains drivable, but the fault can affect emissions and may contribute to poor running or pinging. Arrange diagnosis soon, and stop if the engine stalls, loses power dangerously, or overheats.
Will cleaning the EGR valve fix this code?
Not necessarily. The restriction may be in the metering orifice or another passage, or the flow-monitoring system may be reporting incorrectly. Diagnosis should identify the actual cause before parts are cleaned or replaced.
Can P1402 appear without noticeable symptoms?
Yes. A detected EGR flow restriction may turn on the check-engine light without an obvious change in drivability.
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