Question about 1997 Mercury Grand Marquis

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Check engine light code says laean burn bank# 1

Check engine light code says laean burn bank# 1 clear code same code comes back after 3 or 4 days

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Try cleanig the mass air flow sensor with brake cleaner.sometimes they are just dirty. but it could also be fuel related either bad gas or a clogging filter.try that if it dosent work let me know theres a few more things to try

Posted on Feb 26, 2009

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DTC P2099, how do I tell if this is historic?


Code cleared & came back=Current code/problem IS present.....Next step;Fault tracing,time for a pro !!

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P0407 bank 2 code check engine light on


i would start with o2 sensor that's after the cat and clear code! if still not good then move to the next one till you have it right!

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The service engine light comes on with a code P0193 "Fuel Pressure High". The fuel pressure per the monitor is 39.6 PSI (273 KPA) and the bank 2 Long Term Fuel is 4.3 compared to 1.6 for bank 1....


this vehicle has a fuel pressure sensor on the fuel rail. the sensor has a tendency to glich out on the voltage signal from time to time thus making the check engine light come on. does your scan tool have freeze frame data? if so see if the fuel pressure was high when the code set. if the pressure reads over 100 psi then the sensor is going bad.as for the fuel trim data, not an uncommon split from right and left banks if this reading is at idle. -7.0 to + 7.0 is accecptable long term fuel trim as long as both banks read rather close to one another.

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Check engine light on- auto zone scanner shows error code p0053 probable cause: 1.-check circuit fuse 2.-relay defective 3.-check circuit wiring Where are fuse and relay located?


The code P0053 is for your Bank 1 Oxygen Sensor, the closest Oxygen Sensor to the engine, connected to the Exhaust. Replace your Oxygen Sensor, clear the code, and see if it comes back.

Mar 12, 2011 | Chevrolet Suburban 1500 Cars & Trucks

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Check engine light is on and it reads Misfire on #2 cylinder. Also oxygen sensor bank2 sensor 1 and Bank 1 sensor 3 behind the converter. Engine running rough.


the engine miss fire can cause the other codes to set. you need to repair the miss fire and clear all codes after the miss is repaired then see if the 02 sensor codes return. the miss fire is probably a bad spark plug wire a good tune-up should take care of it ........HAVE A GREAT DAY

Jan 27, 2011 | 1996 Oldsmobile Bravada

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Ml350 replaced a/b cam position sensor reset computer & and erra codes p0016/p0016 check engine ligth is reset car drives with light off when engine is turn off and started the light goes out if you...


P0010....'A' Camshaft Position Actuator Circuit (Bank 1)

P0011....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0012....'A' Camshaft Position - Timing Over-Retarded (Bank 1)

P0013....'B' Camshaft Position - Actuator Circuit (Bank 1)

P0014....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0015....'B' Camshaft Position -Timing Over-Retarded (Bank 1)

P0020....'A' Camshaft Position Actuator Circuit (Bank 2)

P0021....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0022....'A' Camshaft Position - Timing Over-Retarded (Bank 2)

P0023....'B' Camshaft Position - Actuator Circuit (Bank 2)

P0024....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0025....'B' Camshaft Position - Timing Over-Retarded (Bank 2)

I think your sensors are pattern parts and the readings /resistances are not the same as the original parts ,try some bosch units is my first suggestion ,

Nov 02, 2010 | Mercedes-Benz ML350 Cars & Trucks

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98 camry engine light on w/misfires & system too lean


take sample of your fuel into clear plastic bottle from fuel line
is there any water present?
this can cause these codes and then not go on storing codes for other bank even though that bank will be missfiring also due to water & P0300 Random/Multiple Cylinder Misfire Detected being logged
check all connections to coils/leads & wiring connectors
due to miss fire codes for cyl 1,3,5 all on the same bank
also look and check for air leaks on that bank (hose knocked off or splithose)inlet manifold gasket,brake booster etc...
3 injectors being blocked slightly on same bank posible!!!
check wires and signal

was it running like this b4 tune up & repairs?
this is what codes are
P0170 Fuel Trim Malfunction (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

the last code is for trans due to misfire/running lean on bank 1 probably a torque problem code
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1 Answer

I have a 2000 323i. We have error code P1520. Which is Camshaft postion sensor bank 1 (exhaust). I replaced it and cleared the code. However, I drove it and the check engine light stayed off, until I...


i would not try the crank sensor just yet first off they **** to replace properly and you wont want to do that just yet, make sure it is the same code that has come back on as far as the banks are concerned on that enging the m52 the front 3 cly are bank 1 and the back 3 are bank 2, so unless it is talking about O2 sensors that is irrelivant, are you sure you replaced the correct sensor? it is the on in front on the engine with NO wire tail on it make sure it is plugged in correctly, this car is VERY good at knowing the difference between a cam sensor and a crank sensor the other guy does not know what he is talking about

Mar 30, 2009 | 2000 BMW 3 Series

1 Answer

CHECK ENGINE LIGHT ON , WITH CODE SYSTEM TOO LEAN


Possible failed bank 1 sensor 1 oxygen sensor..

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2 Answers

Check Engine Light - O2 Sensor - bank 1 running lean


you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.

Nov 20, 2008 | 2002 Chevrolet Monte Carlo

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