My car

30

Asked by Mar 16, 2017 at 06:31 PM about the 2002 Mercury Grand Marquis GS

Question type: Maintenance & Repair

Four codes  P0401 P1131 P1132 P0306
What are they

6 Answers

73,655

P0401 MERCURY - Exhaust Gas Recirculation Flow Insufficient Detected...Possible causes; EGR passage clogged, Faulty EGR Vacuum Modulator Valve, Faulty EGR Valve, Faulty EGR solenoid valve, EGR solenoid valve harness is open or shorted, EGR solenoid valve circuit poor electrical connection, Dead (Weak) battery, Faulty EGR temperature sensor and circuit, Exhaust gas leaks...EGR flow malfunction could be caused by a clogged EGR valve or EGR tube. Before replacing any parts try cleaning the EGR valve, tube and passages. If the tubes are clean you may have to replaced the EGR Pressure sensor to fix the problem.......P1131 MERCURY - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1...Possible causes; Faulty Upstream Oxygen Sensor Bank 1, Fuel pressure high or low, MAF sensor dirty/defective, Vacuum leak on engine, Leaking fuel injector or fuel pressure regulator, Faulty Powertrain Control Module (PCM)...The code means that the Powertrain Control Module (PCM) has detected a lean system, which means that there is either not enough fuel or and excessive amount of air in the system. Start by checking for vacuum leaks........P1132 MERCURY - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 1...Possible causes; Faulty Upstream Oxygen Sensor Bank 1, Fuel pressure high or low, MAF sensor dirty/defective, Vacuum leak on engine, Leaking fuel injector or fuel pressure regulator, Faulty Powertrain Control Module (PCM).......P0306 MERCURY - Cylinder 6 Misfire Detected...Possible causes; Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6, Fuel injector 6 harness is open or shorted, Fuel injector 6 circuit poor electrical connection, Ignition coil 6 harness is open or shorted, Ignition coil 6 circuit poor electrical connection, Insufficient cylinder 6 compression, Incorrect fuel pressure, Intake air leak...The P0306 code means that the cylinder 6 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 6. If the problem persist more tests needs to be done to diagnose problem.

27,065

first check the output of the exhaust thru the cat,converter. maybe you can even do this with your hand feeling the exhaust flow out of the tail pipe...low/weak/slow?

30

Kelly it's medium

51,875

How many miles on it and when were the spark plugs and coils last changed?

1 of 1 people found this helpful.
30

87,431 and with the spark plugs and coils i dont no i just purchase the car bob

27,065

Marcus..can you take it to a muffler shop..they can check it for free...

Your Answer

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,734 nationwide Grand Marquis listings starting at $1,950.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,730
  • #2
    kbro
    Reputation
    2,130
  • #3
    Js08016
    Reputation
    1,870
View All

Related Models For Sale

Used Ford Crown Victoria
5 Great Deals out of 1,178 listings starting at $1,595
Used Lincoln Town Car
33 Great Deals out of 1,728 listings starting at $1,500
Used Chevrolet Impala
478 Great Deals out of 33,615 listings starting at $777
Used Ford F-150
2,246 Great Deals out of 179,996 listings starting at $1,300
Used Ford Mustang
712 Great Deals out of 38,398 listings starting at $895
Used Honda Accord
1,030 Great Deals out of 60,523 listings starting at $999
Used Chevrolet Tahoe
658 Great Deals out of 39,224 listings starting at $1,000
Used Ford Taurus
247 Great Deals out of 16,557 listings starting at $1,850
Used Lincoln Continental
14 Great Deals out of 4,316 listings starting at $35,999
Used Cadillac DeVille
1,618 listings starting at $1,995

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
4 Great Deals out of 56 listings starting at $2,995
2007 Mercury Grand Marquis GS For Sale
28 listings starting at $2,950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.