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08-07-2018, 11:51 AM | #1 |
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Several OBD Codes
The SES light popped on a week ago. This is a stock 3.0 Si with 66,000 miles.
Using Torque Pro with the profile set for my car and engine, 2 codes found: P114B - Powertrain, missfire during start cyl. 3 P2270 - Powertrain, O2 sensor signal stuck lean bank1 Sensor2 I pulled out the MAF sensor and cleaned it, although it appeared to be clean before I worked on it. What/where would you guys suggest I look? Thank you, David
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2007 Z4M Coupe
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08-08-2018, 02:58 PM | #2 |
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Garage List '08 Z4 3.0SI [8.50]
'66 Triumph TR4A [0.00] '85 Corvette [0.00] '64 Corvette [0.00] '68 Triumph GT6 [0.00] '55 Ford F100 [0.00] '19 VW Golf "R ... [0.00] |
Not Z4 specific, but O2 sensor connections can become corroded/dirty causing codes to be triggered. I'd try cleaning both (don't know which is #2), clear codes, then see what's what. Could be that simple.
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08-08-2018, 04:36 PM | #3 |
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Today I pulled the four O2 sensor connections apart and cleaned them with fluid. I pulled spark plug #3 & #2 and compared them. They were identical which told me there's nothing overly lean in cylinder #3.
I decided to check the intake components for fit and vacuum leak/s. All were good except the rear of the breather box, or whatever its called, and the junction box that connects with it. That one connection didn't look snug. I couldn't push them together for a tighter fit while still mounted to the engine, so I tried snugging the clamp band and the parts separated more. I removed the breather box and junction box. With both pieces lying on my lap I could snap them together and then tighten the clamp band. The new connection was much tighter than what I initially found. After reassembly, I deleted the codes and went for a 20 mile drive. So far no codes, but it may be premature. After I log another 100 miles without a code, I'll be able to say the stars were aligned for me today. David
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Last edited by HTM101; 08-08-2018 at 04:41 PM.. |
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08-08-2018, 04:46 PM | #4 |
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Drives: E86 3.0si
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Garage List '08 Z4 3.0SI [8.50]
'66 Triumph TR4A [0.00] '85 Corvette [0.00] '64 Corvette [0.00] '68 Triumph GT6 [0.00] '55 Ford F100 [0.00] '19 VW Golf "R ... [0.00] |
^ Nice. Gotta think you're going to be good.
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