Quote:
Originally Posted by JPC97DiscoSD
What I have done so far:
Ok i brought a coder reader today and here are the codes:
P1193
P0300
P0308
P0304
P1316
P1314
I cleared the codes it still is doing the same thing i drove it around my block and let it idle for 3min since i cleared them and no CEL lights came on. Still running sluggish. Any help would be awsome  |
P1193 is the same code as mine. One of the oxygen sensors has a bad heater. That is one to start with.
P0300 is a multiple cylinder misfire, probably from rich mixture and bad info from the MAF and the oxygen sensor. P0308 is cylinder eight misfire. P0304 is cylinder 4 misfire.
P1316 is misfire on startup of engine. P1314 is same as P0300.
Clean your MAF sensor and change the oxygen sensor 1193 tells you the location of the oxygen sensor.
This is shamelessly stolen from elsewhere:
Land Rover Repair: Land Rover Disco Air/Fuel metering OBD II code P1193
You are here: Experts > Home/Garden > Auto Repair > Land Rover Repair > Land Rover Disco Air/Fuel metering OBD II code P1193
Topic: Land Rover Repair
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Expert: John McInnis
Date: 2/12/2005
Subject: Land Rover Disco Air/Fuel metering OBD II code P1193
Question
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Followup To
Question -
Hey John,
I have read most of your responses and I think you will be able to help me. I have a 96 Disco with 110,000 miles. The check engine light is on. I like to do my own repairs and have changed the valley pan gasket myself, so I am willing to spend time working on the disco. I love the car and hope to keep it running forever! Back to the light, after talking to the dealer service guy(who is very honest) I decided to buy my own ODB II scanner. I love it! I read and cleared the first set of codes which stated that there was a Fuel/air metering problem, a misfire on cyl 4, an ignition system failure, and a low coolent temp. After clearing, the only one to return was the fuel/air metering code, P1193. I am changing all the plugs and wires as well as the air filter and as they were due anyway. Will this help, or is it a mass air flow sensor failure or simple O2 sensor failure. Those are my intial thoughts. After thinking about it though I wonder if it could be a bad temp sensor(see low coolent temp)? What do you think?
Answer -
Hi Dean,
glad your ODBII reader is working out for you.
Your code, P1193, indicates " HO2S Heater Circuit Inferred Open Circuit, Downstream Sensors". This seems more of a heated O2 sensor problem on the exhaust side. You may want to think about where the mix problem lies and what you can do about it.
I'm not sure what is causing the O2 sensor to trigger but it can't hurt to change all those parts you mentioned, especially when they are needed.
I recently had a crack in my exhaust downpipe that triggered the O2 sensor. After welding the crack shut and resetting the system, no reading was found and it seems to be ok. BTW: The crack was at the joint just before the downpipe flange that attaches to the exhaust manifold. There was much stress there and I think its been that way since new. Strange the crack should develop so close to the original weld from the factory.
I don't think it's a bad temp sensor but its wise to check up on that low coolant temp code. Could that indicate a thermostat problem? Maybe.
The way would be to hook up your Disco to a TestBook and have it thoroughly examined. From there, it can be determined if its a MAF or sensor problem.
Best of luck,
JohnMc
