Question about 1997 Pontiac Grand Am

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Obd code reads P1133. Replaced sensor 1 bank 1 sensor but still have a problem. Do I need to replace sensor 2 also???

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What you need to do. is use the codes you get ,to look at a diagnostic chart,of possible causes for the codes.
If it is an O2 or any other sensor, you should perform some type of test,to determine,not only if their not working correctly,but what the system problem is ,that set the codes.
OBD2 Codes-do not tell you what to replace. They indicate a system malfunction. It is up to you to diagnose the issues.

If you believe you have a downstream O2 Sensor going,you most likely have a cat not far behind or it wouldn't be out of range and set the code

I would install a new cat and both sensors,on a 13 year old vehicle

Posted on Oct 01, 2010

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P1133/oxegen sensor


MAKE SURE THE CONNECTIONS AT THE SENSOR ARE GOOD,ALSO CHECK FOR VACUUM LEAKS,HERE'S A LINK TO YOUR CODE,THE OLD SENSOR MAY BE GOOD,JUST A VACUUM LEAK, P1133 Chevrolet HO2S Insufficient Switching Bank 1 Sensor 1

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Check engine light is on and i got error code p1133. what is that?


Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
- Vacuum leak
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 harness is open or shorted
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 circuit poor electrical connection

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) activity for 90 seconds after closed loop operation has begun. The PCM determines if the front HO2S is functioning properly by counting the number of HO2S-1 Lean/Rich (L/R) and Rich/Lean (R/L) switches.

If the Powertrain Control Module (PCM) determines that the front HO2S did not switch enough times, the PCM will set the P1133 code.

replace the o2 sensor

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1 Answer

The engine light is on on my 1999 Lexus RX 300. Scaner has identified it as P1133 and P1354. Can you please tell me what are these two codes. Thanks


P1354 VVT System Malfunction (Bank 2)
P1133 Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
http://www.obd-codes.com/trouble_codes/lexus/ you can find all the codes here

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I have a 2000 chevy suburban with codes p1133 and p0131 what is the pooblem


P1133 indicates heated oxygen sensor insufficient switching bank #1 sensor #1. P0131 indicates voltage from that sensor is staying low more than 2 minutes. That sensor could be bad or it could indicate a rich condition.

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Computer analysis showed these codes... P0330 P1133 P1135 P1346 P1349 P1351 P1354. can anyone tell me what each of these mean?


P0330 Knock Sensor 2 Circuit (Bank 2)
P1133 Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1, Sensor 1)
P1135 Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P1346 VVT Sensor Range/Performance Problem (Bank 1)
P1349 VVT System Malfunction (Bank 1)
P1351 Variable Valve Timing / CMP Sensor Range / Performance
P1354 Variable Valve Timing System Fault

NOTE:Variable Valve Timing (VVT) sensor is also known as camshaft position sensor.
The Variable Valve Timing (VVT) system controls intake valve timing in response to driving conditions.

Possible causes are:
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  2. Faulty oil control valve P1346, P1349, P1351 & P1354
  3. Faulty VVT controller assembly P1346, P1349, P1351 & P1354
  4. Faulty ECM All Codes
  5. Jumped timing belt All Codes
  6. Faulty Camshaft Position Sensor P1346, P1349, P1351 & P1354
  7. Faulty O2 Sensor (Bank 1, Sensor 1) P1133 & P1135

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98 chevy s-10 codes p0131, p0171, and p1133


Your O2 sensor is starting to go bad .recomend replacement before it gets worse

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1 Answer

1998 GMC Sonoma threw code P1133 02S 1/1


P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
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Apr 20, 2009 | 1998 GMC Sonoma

1 Answer

P1133 and p0134 code


Code P0134 is the #1 oxygen sensor on bank 1, up near exhaust manifold.
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Diagnostic codes 97 tahoe 4d 4wd 5.7


p1460 cooling fan circuit,p1153 ho2s insufficient switching bank 2 sensor 1,p1133 insuf. swit. sen. 1 or bank 1 sen. 1,p420 catalyst system efficiency below threshold bank 1,p152 o2sen. circuit high volt. bank 2 sen.1

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