Multiple codes

[tcosson]

99 Disco II 4.0
I have replaced the O2 sensors, the MAF, the air Filter, the plugs(bosch4), the wires(magnacore), ran seafoam through the intake and through the gas tank and keep getting the same codes.

first I get these
P0135 Front sensor heater LH bank - short/open circuit
P0155 Front sensor heater RH bank - short/open circuit
P0134 Front sensor LH bank open circuit

then later it will stumble badly and I get these
P1300 Catalyst damaging level of misfire on more than one cylinder
P0303 Injector 3 excess emissions/catalyst damaging level of misfire
P0305 Injector 5 excess emissions/catalyst damaging level of misfire
P0307 Injector 7 excess emissions/catalyst damaging level of misfire
P0301 Injector 1 excess emissions/catalyst damaging level of misfire
P0300 Excess emissions detected on more than one cylinder

Since it's only on one side I assume the gas and filter are not the problem.
Is the LH bank the drivers side(USA), cylinders 1,3,5,7?
If so could the O2 sensors be causing it to mess with the fuel/air mix so bad that it would missfire?
My plan this evening is to swap the O2 sensors to opposite sides and see if I get RH bank errors, does this sound like an O.K. plan?

 

[joey]

Sound to me like you are not getting the 12volts to the O2 Sensors, and the other issue sounds like a possilbe bad coil pack.

 

[tcosson]

Anyone know if there is a way to test the coil pack?

 

[mbooth2]

I'm not a expert, but I have read in some other forums that misfires on only the odd cylinders could be a faulty Vehicle Speed Sensor. The VSS will aparently shut down the odd cylinders if it does not agree with the signal from the tach. If your VSS is dirty or faulty it maybe killing cylinders 1-3-5-7 and causing excess unburnt fuel to throw codes on the O2 sensors and superheating the cats as a result. Hope this helps!

 

[dudleyp]

99 Disco II 4.0
I have replaced the O2 sensors, the MAF, the air Filter, the plugs(bosch4), the wires(magnacore), ran seafoam through the intake and through the gas tank and keep getting the same codes.

first I get these
P0135 Front sensor heater LH bank - short/open circuit
P0155 Front sensor heater RH bank - short/open circuit
P0134 Front sensor LH bank open circuit

then later it will stumble badly and I get these
P1300 Catalyst damaging level of misfire on more than one cylinder
P0303 Injector 3 excess emissions/catalyst damaging level of misfire
P0305 Injector 5 excess emissions/catalyst damaging level of misfire
P0307 Injector 7 excess emissions/catalyst damaging level of misfire
P0301 Injector 1 excess emissions/catalyst damaging level of misfire
P0300 Excess emissions detected on more than one cylinder

Since it's only on one side I assume the gas and filter are not the problem.
Is the LH bank the drivers side(USA), cylinders 1,3,5,7?
If so could the O2 sensors be causing it to mess with the fuel/air mix so bad that it would missfire?
My plan this evening is to swap the O2 sensors to opposite sides and see if I get RH bank errors, does this sound like an O.K. plan?

Hi,
I have the same codes on the LH banks, just wondering if you found the problem.

 

[Disco Mike]

How many miles on this truck, how long ago did you replace the 02's and when you bought the new MAF, where did you buy it and was it in a Rover box with matching part members with your old MAF.
In the last couple of weeks, I have seen this same set of odd plugs all misfiring, in one case it was all the even plugs, but have yet to hear anyone find a cure.

 

[carehta]

I have a similar issue on my D1 96 right now. I've been told to check for blown head gasket. Misfire on nearby cylinders or a complete set of one side may indicate such issue. Check for coolant on spark plugs, which may prevent sparkling correctly. You may still test sparks by removing the lead end, provided that you can manage to hold the lead with another spark plug connected to it and hold it close to the engine's spark plug with somebody else cranking for you.

 

[joey]

Never test spark in the manor you suggest unless you like replacing the ECU.

 

[dudleyp]

I have a similar issue on my D1 96 right now. I've been told to check for blown head gasket. Misfire on nearby cylinders or a complete set of one side may indicate such issue. Check for coolant on spark plugs, which may prevent sparkling correctly. You may still test sparks by removing the lead end, provided that you can manage to hold the lead with another spark plug connected to it and hold it close to the engine's spark plug with somebody else cranking for you.

What is the codes you are getting and what have you done so far?

 

[Disco Mike]

99 Disco II 4.0
I have replaced the O2 sensors, the MAF, the air Filter, the plugs(bosch4), the wires(magnacore), ran seafoam through the intake and through the gas tank and keep getting the same codes.

first I get these
P0135 Front sensor heater LH bank - short/open circuit
P0155 Front sensor heater RH bank - short/open circuit
P0134 Front sensor LH bank open circuit

then later it will stumble badly and I get these
P1300 Catalyst damaging level of misfire on more than one cylinder
P0303 Injector 3 excess emissions/catalyst damaging level of misfire
P0305 Injector 5 excess emissions/catalyst damaging level of misfire
P0307 Injector 7 excess emissions/catalyst damaging level of misfire
P0301 Injector 1 excess emissions/catalyst damaging level of misfire
P0300 Excess emissions detected on more than one cylinder

Since it's only on one side I assume the gas and filter are not the problem.
Is the LH bank the drivers side(USA), cylinders 1,3,5,7?
If so could the O2 sensors be causing it to mess with the fuel/air mix so bad that it would missfire?
My plan this evening is to swap the O2 sensors to opposite sides and see if I get RH bank errors, does this sound like an O.K. plan?

You never answered back, do you want help or not?