FocusCanada Forums Technobabble The Basics P0315 E1... heater circuit

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P0315 E1... heater circuit
NOS2Go4Me Offline
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#1
08-08-2011, 11:27 PM
So... John (Scorcher) told me this was an O2 sensor failure. The first bank sensor.

Dumb question - which one is that? Big Grin Please tell me whether it's the "top" or "bottom" O2 sensor for the Zetec as I have a header but still recall which sensor is which. IIRC they're still oriented in the same positions with the bottom one a little lower than the top one.

Second question - part number? Cost? Ken? Paging Ken! Tongue

I reset the DTC with my XCal2 and am carrying on for now. It doesn't seem to be hitting my fuel economy much... yet. Yes, I'm running the "helper" harness on the bottom O2 sensor, which is where I was told to run it quite some time ago. Point of interest - is that correct?
Daily driver 1: 2007 Jeep Wrangler Unlimited Sport "S"

33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.

Daily driver 2: 2006 Subaru Legacy GT

COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.
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hardk0re Offline
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#2
08-09-2011, 01:30 AM
first bank sensor is primary o2 sensor which is the first sensor downstream from the cynlinder head. second bank sensor is after the catalyic, and you should almost never get a code for that even if there is a failure on it due to the cheater harness you have.
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GFXjamie Offline
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#3
08-09-2011, 01:44 AM
yep looking at primary sensor, heater circuit failure. car will idle weird until it warms up is all. just warms o2 sensor until car heats up enough to read correct
2007 ZX4 2.0l unaturally aspirated
FSwerks stage 2 Turbo kit, Cosworth Intake Manifold, 3" custom HKS turbo back
regular stage 2 @10ps : 232whp/219wtq
stage 2 plus @ 13psi: 278whp/229wtq
Stage 2 plus @15psi: 296whp/240wtq

2013 Focus ST Tuxedo Black - The daily
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NOS2Go4Me Offline
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#4
08-09-2011, 03:22 AM (This post was last modified: 08-09-2011, 03:23 AM by NOS2Go4Me.)
So... no need to replace? Yeah, it does idle a bit funky till it warms up.

And thanks Kev / Jamie for helping me cut my Zetec teeth. Smile
Daily driver 1: 2007 Jeep Wrangler Unlimited Sport "S"

33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.

Daily driver 2: 2006 Subaru Legacy GT

COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.
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moon111 Offline
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#5
08-09-2011, 08:37 AM
My wife's minivan had the same problem. Replaced sensor and it lasted about a couple of weeks. Bought a different type and it didn't have problem.
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NOS2Go4Me Offline
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#6
08-10-2011, 04:59 AM
Sensor arrives tomorrow. Then, I'll install it once the exhaust cools off and see what's what.
Daily driver 1: 2007 Jeep Wrangler Unlimited Sport "S"

33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.

Daily driver 2: 2006 Subaru Legacy GT

COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.
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NOS2Go4Me Offline
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#7
08-10-2011, 09:17 PM
CEL went away. Idle smoothed out. Screw it, buying the new sensor anyway.
Daily driver 1: 2007 Jeep Wrangler Unlimited Sport "S"

33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.

Daily driver 2: 2006 Subaru Legacy GT

COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.
Website Find
Reply


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