98 T/A trouble shooting codes
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Teching In
Joined: Sep 2008
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98 T/A trouble shooting codes Any help appreciated, I have a miss while driving. I borrowed a scanner and have codes: po132, po418, po155. The car ran great in the past, started occasionally missing, usually on short trips around town. I cleared codes drove it 2 weeks, now it intermittently started missing again, normally clears itself up. I’ve looked all the codes up, just not sure where to start.Any ideas? Thanks
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Joined: Aug 2010
Posts: 7,323
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From: Ann Arbor, MI
Code P0132 indicates that Bank 1 is running extremely rich or the O2 sensor is bad.
Code P0155 indicates that the Bank 2 upstream O2 sensor is likely bad, or the wiring to it is bad.
Code P0148 indicates the fuel pressure at the injectors is wrong, likely low, which could cause misfires due to lean condition.
Yeah, P0132 and P0148 seems to indicate opposite problems. Generally misfires, when fueling related, are due to lean conditions.
I don't claim to be an expert, but I would personally start by checking the fuel pressure on the rail. When was the fuel filter last replaced? If the fuel pressure is low and the filter is newish, then the main pump may be weak/leaking.
If one O2 sensor is bad, I would replace both.
Code P0155 indicates that the Bank 2 upstream O2 sensor is likely bad, or the wiring to it is bad.
Code P0148 indicates the fuel pressure at the injectors is wrong, likely low, which could cause misfires due to lean condition.
Yeah, P0132 and P0148 seems to indicate opposite problems. Generally misfires, when fueling related, are due to lean conditions.
I don't claim to be an expert, but I would personally start by checking the fuel pressure on the rail. When was the fuel filter last replaced? If the fuel pressure is low and the filter is newish, then the main pump may be weak/leaking.
If one O2 sensor is bad, I would replace both.
