Question about 1996 Mercury Sable

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Code p0402 comes up what do I do? - 1996 Mercury Sable

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Code 402 means the EGR gas flow is excessive. On Ford products it could be the EGR valve or the sensor. Both components would need to be tested.

Posted on May 08, 2013

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Posted on Jan 02, 2017

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Had a smog test done got a P0402 code.And had a very bad tune-up changed spark plugs wires filter oil change, plugs stuck, oil was black, could that be the cause of the P0402 code, exhaustive gas flow


www.yourmechanic.com/article/p0402-obd-ii-trouble-code-exhaust-gas-recirculation-flow-excessive-detected- Please go here for a detailed account of the cause. God-Bless!

Oct 12, 2016 | 1996 Ford Explorer

1 Answer

Location of p0402 sensor code


Code 402 is a problem with the EGR valve performance, not the O2 sensors.

Jun 01, 2013 | 1997 GMC Savana

2 Answers

Code p0402??


Code 402 means the computer has detected flow in the EGR valve when it should be closed.
The valve would need to be checked out.

May 06, 2013 | 2001 Isuzu Rodeo

1 Answer

What does the code p0402 mean on a toyota tacoma 2000?


Call dealer. Ask for mechanic. he will tell you.

Jan 18, 2013 | Cars & Trucks

1 Answer

Trouble code p0402 is coming up on the scan tool, what is the problem?


On a domestic car using a scan tool, the trouble code p0440 is an Evaporative Emission Control System Malfunction. It can mean the gas cap is not installed or working right, the purge solenoid has failed, or the canister is plugged and not working right.

Oct 28, 2012 | 1996 Lincoln Town Car

4 Answers

Grand carvan gives p402 code


This is not a cut and dry fault code. This means that more than one thing wrong can set the code in the computers memory. Here is the low down on the P0402 fault code. This is from the OBD2 fault code diagnostic book.

P0402 - Exhaust Gas Recirculation Flow Excessive Detected
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible engine hesitation
Possible causes - EGR solenoid valve harness is open or shorted
- EGR solenoid valve circuit poor electrical connection
- EGR volume control valve stuck closed
- Dead (Weak) battery
- Faulty EGR temperature sensor and circuit
- Faulty EGR Valve
- EGR passage clogged
- Exhaust gas leaks

Jan 18, 2012 | Cars & Trucks

2 Answers

Service engine code P0402 for Ford Mustang


P0402 OBD-II Trouble Code - Exhaust Gas Recirculation Flow (EGR) Excessive Detected

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.

Symptoms
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.

Causes
A code P0402 most likely means one or more of the following has happened:
* The DPFE (differential pressure) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (most likely carbon buildup)
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
* Check the voltage at the DPFE sensor both at idle and when the EGR is open
* Replace the DPFE sensor

Hope helps (remember rated and comment this).

May 27, 2010 | 2001 Ford Mustang

1 Answer

P0402 code


follow the vaccum line from the egr valve back to the silinoid that silinoid is defective or unplugged. the egr valve is below the breater tube on the back side of the engine

Aug 14, 2008 | 2002 Toyota Camry

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