P1155: Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
The sensor is on the Bank 1 throttle body with electrical connection. Its a delicate sensor. Unscrew it from the throttle body and check if its dirty, spray it with electronic cleaner with care. If its damaged, just replace it.
If its not rectified, the car computer may default the air temperature to 20 degC and the air flow will not be correct and may have the following effect:
1. You might have difficulty in winter startups 2. Loss fuel efficiency (air/fuel ratio is messed up)/NOx problems/failed emission test/prematured catalytic converter replacement etc.
CLARIFICATIONAn Air Fuel Ratio Sensor is also known as Wide Range Oxygen Sensor.Bank 1 Sensor 1 is mounted in the exhaust header before the Catalytic Converter (CC). The ECU uses the signal from the AF sensor to adjust Air/Fuel ratio. On V6 and V8 engines there is a second AF Sensor in the other header. (Bank 2 Sensor 1).
After the CC there is a narrow range O2 sensor called Bank 1 Sensor 2. It monitors the CC. If there are two CCs there is a second O2 sensor (Bank 2 Sensor 2)
The AF Sensor draws about 3 amps so check connections. The heater is a resistor between the B+ and HT terminals of the plug. On V engines there is also a AF relay to check.
I found the above info else ware on the web. I have the code intermittently on my 2001 V6 Sienna. If I ever get a day off I am going to troubleshoot mine and will report the results.
PS I may have answered this twice. I think I lost the first one.
Here is a listing of Toyota Specific Diagnostic Trouble CodesCode
Description
P1100
BARO Sensor Circuit.
P1120
Accelerator Pedal Position Sensor Circuit.
P1121
Accelerator Pedal Position Sensor Range/Performance Problem.
P1125
Throttle Control Motor Circuit.
P1126
Magnetic Clutch Circuit.
P1127
ETCS Actuator Power Source Circuit.
P1128
Throttle Control Motor Lock.
P1129
Electric Throttle Control System.
P1130
Air/Fuel Sensor Circuit Range/Performance. (Bank 1 Sensor 1)
P1133
Air/Fuel Sensor Circuit Response. (Bank 1 Sensor 1)
P1135
Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)
P1150
Air/Fuel Sensor Circuit Range/Performance. (Bank 1 Sensor 2)
P1153
Air/Fuel Sensor Circuit Response. (Bank 1 Sensor 2)
P1155
Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)
P1200
Fuel Pump Relay Circuit.
P1300
Igniter Circuit Malfunction - No. 1.
P1310
Igniter Circuit Malfunction - No. 2.
P1335
No Crankshaft Position Sensor Signal - Engine Running.
P1349
VVT System.
P1400
Sub-Throttle Position Sensor.
P1401
Sub-Throttle Position Sensor Range/Performance Problem.
P1405
Turbo Pressure Sensor Circuit.
P1406
Turbo Pressure Sensor Range/Performance Problem.
P1410
EGR Valve Position Sensor Circuit Malfunction.
P1411
EGR Valve Position Sensor Circuit Range/Performance.
P1500
Starter Signal Circuit.
P1510
Boost Pressure Control Circuit.
P1511
Boost Pressure Low.
P1512
Boost Pressure High.
P1520
Stop Lamp Switch Signal Malfunction.
P1565
Cruise Control Main Switch Circuit.
P1600
ECM BATT Malfunction
P1605
Knock Control CPU.
P1630
Traction Control System.
P1633
ECM.
P1652
Idle Air Control Valve Control Circuit.
P1656
OCV Circuit.
P1658
Wastegate Valve Control Circuit.
P1661
EGR Circuit.
P1662
EGR by-pass Valve Control Circuit.
P1780
Park/Neutral Position Switch Malfunction (Only For A/T)
bank 1 sensor 1 2002 on toyots sienna
Where is the oxygen sensor code p1155 located in toyota mini van sienna?
Gu
location
Yes it does
i have a 1999 Toyota seinna v6 and i will know where can i find the vehicle speed sensor.
must be a oxygen sensor
its is located downstream on the backside exhaust manifold
no
Sienna's have two knock sensors located in the valley underneath the intake manifold. Replacement is a three hour job.
Trouble code P0150 means:O2 sensor circuit malfunction (Bank 2 Sensor 1)
Bank 2 sensor 1 is the O2 sensor in the exhaust manifold closest to the firewall.Cut and paste the link below for a detailed fix with pics of the O2 sensor repair."http://polifrogblog.blogspot.com/2009/11/sienna-o2-sensor-change.html"