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3rd & 4th Generation (1992–1996 & 1997–2001) Toyota Camry Discussion for years: 1992-1996 & 1997-2001 Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

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Old 11-09-2012, 03:03 PM   #1 (permalink)
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1999 Toyota Camry V6

I have error codes P0125 and P1155. What do I do to cure them.
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Old 11-10-2012, 12:24 PM   #2 (permalink)
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Might get better chance for an answer in the Camry forum...
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Old 11-10-2012, 05:17 PM   #3 (permalink)
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I moved your thread to the Gen 3/4 Camry forum.

P0125 = Insufficient Coolant Temperature For Closed Loop Fuel Control

Could be the thermostat is stuck open, or the coolant temperature sensor has gone bad. Does the temperature gage on the instrument cluster show the temperature is about halfway between hot and cold? If it's running too cold, it's probably the thermostat.

P1135 = Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)

That's the sensor in the rear bank's exhaust manifold. Here's a DIY thread showing how to replace it: DIY: 1MZ-FE rear bank air fuel/ O2 senor replacement.
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Old 11-11-2012, 04:12 AM   #4 (permalink)
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Quote:
Originally Posted by BMR View Post
I moved your thread to the Gen 3/4 Camry forum.

P0125 = Insufficient Coolant Temperature For Closed Loop Fuel Control

Could be the thermostat is stuck open, or the coolant temperature sensor has gone bad. Does the temperature gage on the instrument cluster show the temperature is about halfway between hot and cold? If it's running too cold, it's probably the thermostat.

P1135 = Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)

That's the sensor in the rear bank's exhaust manifold. Here's a DIY thread showing how to replace it: DIY: 1MZ-FE rear bank air fuel/ O2 senor replacement.
Fix the P1135 and the P0125 will go away. Is your car CA emissions? If yes it takes the more expensive air/fuel sensor. Your car is not going into closed loop (hence the P0125) because of your malfunctioning B1S1 sensor. Very common problem.
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Old 12-19-2012, 10:59 PM   #5 (permalink)
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Quote:
Originally Posted by artbuc View Post
Fix the P1135 and the P0125 will go away. Is your car CA emissions? If yes it takes the more expensive air/fuel sensor. Your car is not going into closed loop (hence the P0125) because of your malfunctioning B1S1 sensor. Very common problem.
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