p0133 and p0153 codes HELP!!!

[russell16]

So i got my whole exhaust done, longtubes, o/r prochamber, and catback about a week or 2 ago. I originally did not buy MIL eliminators because i planned on getting a tuner and just disabling them so when the check engine light came on i pretty much ignored it as much as i could till it stared me down enough to go buy MIL eliminators. I installed them on the rear O2 sensors and had the car off for more than an hour. The light still came back on so i went to advance auto parts and had them read the codes and i wrote them down.

p0153 - O2 sensor CKT slow response (bank 2 sensor 1)
p0133 - O2 sensor CKT slow response (bank 1 sensor 1)

i did some research and i have some questions.

Since the codes are for both front O2 sensors, I doubt both my front sensors went bad at the same time. Also when i got the car the guy said he just had the replaced the o2 sensors. (i could be wrong)

1. one possible reason is an exhaust leak. How do you check for exhaust leaks? Will a shop do it and fix them for free/pretty cheap? (im a college student and dont have the tools to do it myself)

2. I read that it might be a problem with my longtubes moving the O2 sensors back taking more time for them to heat. how do you fix this problem? i read something about a tune? Like i said i was planning on getting an SCT tuner, will this be able to fix it?

3. Its not bad for the car if i keep running it right? i have a 350 mile trip back to dallas for x-mas break.

Thanks in advance for help.

 

[ky_kneedragger]

as far as the sensors being too far back,u can buy threaded bungs and have them welded on the back primary tube and put the sensor there.thats what i did with mine.you have to take the headers back off though

 

[hotcobra03]

.read this on HO2S ............. 2003 PCED OBD SECTION 5: Pinpoint Tests
Procedure revision date: 07/01/2003

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H: Fuel Control H: Introduction

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H20 PERFORM KOER SELF-TEST
Key on, engine running and engine at operating temperature.
Activate Key On, Engine Running (KOER) Self-Test.
Is DTC P0040, P0041, P1127, P1128, P1129 or P2278 present during KOER Self-Test?
Yes No
GO to Section 4, Powertrain Diagnostic Trouble Code (DTC) Charts and SERVICE DTC P0040, P0041, P1127, P1128, P1129 or P2278. GO to H21 .

H21 DIAGNOSTIC TROUBLE CODE (DTC) P0133 AND P0153: HO2S RESPONSE TEST
DTC/HO2S Reference List:

DTC P0133 = HO2S-11
DTC P0153 = HO2S-21
Key on, engine off.
Select Generic OBD II Function from the menu and trigger.
Press Continue.
Select Diagnostic Monitoring Test Results from the menu and trigger.
Scroll to Test ID: 01 trigger and press start.
Key off. (REFER to Section 2 Diagnostic Monitoring Test Results.)
Is the indicated value greater than the minimum threshold?
Yes No
COMPLETE PCM Reset to clear DTCs. COMPLETE HO2S Monitor Drive Cycle (REFER to Section 2, Drive Cycles ). GO to H20 . If test results indicate a pass, testing is complete. GO to H23 .

H23 CHECK FOR UNMETERED AIR LEAKS
Fuel calculations can be affected by unmetered air leaks.

Carefully inspect the following areas for potential air leaks:
Hoses connecting to MAF sensor assembly.
Hoses connecting to throttle body.
Intake manifold gasket leaks.
PCV disconnected.
Vacuum lines disconnected.
Improperly seated engine oil dipstick, tube, and oil fill cap.
Exhaust leaks at flanges and gaskets.
Are any air leaks present?
Yes No
REPAIR source of air leak. COMPLETE PCM Reset to clear DTCs. COMPLETE HO2S Monitor Drive Cycle (REFER to Section 2, Drive Cycles ). GO to H24 .

 

[hotcobra03]

any update?

was waiting to here back on what you tryed...of the 4 functions on o2s this one seams the hardest...code says you o2s are slow not bad, but could be bad? when you installed headers did you unplug o2s or twist harness backwards to screw them in??????/how about harness extenders did you use them or splice harness to make longer????? bosch makes some with a longer harness that reaches left side but rightside is an inch too short,,i let my main harness to be unhooked to bracket and it did fit but now harness plug is loose..mine is an 03 cobra with bbk l/tubes.my headers cooked the harness cause of too much added to much lenght to harness ,P0133 - HO2S Sensor Circuit Slow Response (HO2S-11) The HEGO Monitor checks the HO2S Sensor frequency and amplitude. If during testing the frequency and amplitude were to fall below a calibrated limit, the test will fail. Contaminated HO2S sensor.
Exhaust leaks.
Shorted /open wiring.
Improper fueling.
MAF sensor.
Deteriorating HO2S sensor.
Inlet air leaks.
Access HO2S test results from the Generic OBD-II menu to verify DTC. than the drivecycle could have triggered it

 

[hotcobra03]

read this?

2003 PCED OBD SECTION 1: Description and Operation
Procedure revision date: 08/28/2003

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Heated Oxygen Sensor (HO2S) Monitor
The HO2S Monitor is an on-board strategy designed to monitor the HO2S sensors for a malfunction or deterioration which can affect emissions. The fuel control or Stream 1 HO2S sensors are checked for proper output voltage and response rate (the time it takes to switch from lean to rich or rich to lean). Stream 2 HO2S sensors used for Catalyst Monitoring, and Stream 3 HO2S sensors used for FAOS (Fore-Aft Oxygen Sensor) control are also monitored for proper output voltage. Input is required from the ECT or CHT, IAT, MAF and CKP sensors to activate the HO2S Monitor. The Fuel System Monitor and Misfire Detection Monitor must also have completed successfully before the HO2S Monitor is enabled.

The HO2S sensor senses the oxygen content in the exhaust flow and outputs a voltage between zero and 1.0 volt. Lean of stoichiometric (air/fuel ratio of approximately 14.7:1), the HO2S will generate a voltage between zero and 0.45 volt. Rich of stoichiometric, the HO2S will generate a voltage between 0.45 and 1.0 volt. The HO2S Monitor evaluates the Stream 1 (Fuel Control) and Stream 2 (Catalyst Monitor) and the Stream 3 (FAOS Control) HO2Ss for proper function.
Once the HO2S Monitor is enabled, the Stream 1 HO2S signal voltage amplitude and response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum calibratable threshold voltage. A fixed frequency closed loop fuel control routine is executed and the Stream 1 HO2S voltage amplitude and output response frequency are observed. A sample of the Stream 1 HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate. A HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the Output State Monitor (OSM) and by measuring the current going through the heater circuit. Since the 2002 Model Year, vehicles will monitor the HO2S signal for a high voltage, in excess of 1.5 volts. The HO2S Monitor DTCs can be categorized as follows:
The MIL is activated after a fault is detected on two consecutive drive cycles.
The HO2S Monitor DTCs can be catagorized as follows:

HO2S signal circuit malfunction - P0131, P0136, P0151, P0156.
HO2S slow response rate - P0133, P0153.
HO2S circuit high voltage - P0132, P0138, P0144, P0152, P0158, P0164.
HO2S heater circuit malfunction - P0135, P0141, P0155, P0161, P0147, P0167.
HO2S heater current malfunction - P0053, P0054, P0055, P0059, P0060, P0061.
Donwstream HO2S not running in on-demand self test - P1127.
Swapped HO2S connectors - P0040, P0041, P1128, P1129, P2278.
HO2S lack of switching - P1131, P1132, P1151, P1152, P2195, P2196, P2197, P2198.
HO2S lack of switching (Sensor indicates lean) - P1137, P1157, P2270, P2272, P2274, P2276.
HO2S lack of switching (Sensor indicates rich) - P1138, P1158, P2271, P2273, P2275, P2277.





Figure 11: Heated Oxygen Sensor Monitor




Figure 12: Heated Oxygen Sensor Monitor - PZEV (Partial Zero Emission Vehicle) Focus Only



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[hotcobra03]

drive cycle????

2003 PCED OBD SECTION 2: Diagnostic Methods
Procedure revision date: 12/19/2002

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Drive Cycles
Description of OBD II Drive Cycle
The following procedure is designed to execute and complete the OBDII monitors and to clear the Ford P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature is outside 4.4 to 37.8°C (40 to 100 °F), or the altitude is above 2438 meters (8000 feet), the EVAP monitor will not run. If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be "bypassed" and the P1000 cleared. The EVAP "bypassing" procedure is described in the following drive cycle.

The OBDII Drive Cycle will be performed using a scan tool. Consult the instruction manual for each described function.

Note: A detailed description of a Powertrain Control Module (PCM) Reset is found in this section, refer to the table of contents.

Drive Cycle Recommendations
Most OBDII monitors will complete more readily using a "steady foot" driving style during cruise or acceleration modes. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion.
Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.
The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".
WARNING: STRICT OBSERVANCE OF POSTED SPEED LIMITS AND ATTENTION TO DRIVING CONDITIONS ARE MANDATORY WHEN PROCEEDING THROUGH THE FOLLOWING DRIVE CYCLES.

For best result, follow each of the following steps as accurately as possible:



OBDII Monitor Exercised Drive Cycle Procedure Purpose of Drive Cycle Procedure
Drive Cycle Preparation 1. Install scan tool. Turn key on with the engine off. Cycle key off, then on. Select appropriate Vehicle & Engine qualifier. Clear all DTC's/Perform a PCM reset. Bypass engine soak timer. Resets OBDII Monitor status.
2. Begin to monitor the following PIDs: ECT, EVAPDC, FLI (if available) and TP MODE. Start vehicle WITHOUT returning to Key Off.
3. Idle vehicle for 15 seconds. Drive at 64 Km/h (40 MPH) until ECT is at least 76.7°C (170°F).
Prep for Monitor Entry 4. Is IAT within 4.4 to 37.8°C (40 to 100°F)? If not, complete the following steps, but note that step 14 will be required to "bypass" the EVAP monitor and clear the P1000. Engine warm-up and provide IAT input to the PCM.
HEGO 5. Cruise at 64 Km/h (40 MPH) for at least 5 minutes. Executes the HEGO monitor.
EVAP 6. Cruise at 64 to 128 Km/h (45 to 65 MPH) for 10 minutes (avoid sharp turns and hills). NOTE: To initiate the monitor TP MODE should = PT, EVAPDC must be > 75%, and FLI must be between 15 and 85%. Executes the EVAP monitor (If IAT is within 4.4 to 40°C (40 to 120°F).
Catalyst 7. Drive in stop-and-go traffic conditions. Include five different constant cruise speeds, ranging from 32 to 112 Km/h (20 to 70 MPH) over a 10 minute period. Executes the Catalyst Monitor.
EGR 8. From a stop, accelerate to 72 Km/h (45 MPH) at 1/2 to 3/4 throttle. Repeat 3 times. Executes the EGR Monitor.
SEC AIR/CCM (Engine) 9. Bring the vehicle to a stop. Idle with transmission in drive (neutral for M/T) for 2 minutes. Executes the ISC portion of the CCM.
CCM (Trans) 10. For M/T, accelerate from 0 to 80 Km/h (0 to 50 MPH), continue to step 11. For A/T, from a stop and in overdrive, moderately accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop vehicle and repeat without overdrive to 64 Km/h (40 MPH) cruising for at least 30 seconds. While at 64 Km/h (40 MPH), activate overdrive and accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop for at least 20 seconds and repeat step 10 five times. Executes the transmission portion of the CCM.
Misfire & Fuel Monitors 11. From a stop, accelerate to 104 Km/h (65 MPH). Decelerate at closed throttle until 64 Km/h (40 MPH) (no brakes). Repeat this 3 times. Allows learning for the misfire monitor.
Readiness Check 12. Access the On-Board System Readiness (OBDII monitor status) function on the scan tool. Determine whether all non-continuous monitors have completed. If not, go to step 13. Determines if any monitor has not completed.
Pending Code Check and EVAP Monitor "Bypass" Check 13. With the scan tool, check for pending codes. Conduct normal repair procedures for any pending code concern. Otherwise, rerun any incomplete monitor. If the EVAP monitor is not complete AND IAT was out of the 4.4 to 37.8 °C (40 to 100 °F) temperature range in step #4, or the altitude is over 2438 m. (8000 ft.), the EVAP "bypass" procedure must be followed. Proceed to Step 14. Determines if a pending code is preventing the clearing of P1000.
EVAP Monitor "Bypass" 14. Park vehicle for a minimum of 8 hours. Repeat steps 2 through 12. DO NOT REPEAT STEP 1. Allow the "bypass" counter to increment to two.





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