Question about 2000 Hyundai Sonata

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Hesitation Just wondering if you have a copy of the TSB that indicated the HO2S and computor were bad. I've got a 2000 and only on cold start does it hesitate for a few seconds before kicking in... Please e-mail me at carguy1312@yahoo.com THanks, Scott

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Drags when trying to start car, it has new battery, starter and alternator


FIRST MAKE SURE ALL YOUR CONNECTIONS ON THE STARTER ARE TIGHT.CLEAN THE BATTERY TERMINALS.IT MAY ALSO BE A BAD REBUILT STARTER. YOU GET ONE EVERY SO OFTEN.

Mar 26, 2013 | 2002 Mercury Sable

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My 97 malibu hard to start when cold i've change the egr val intank gasket & crank sensor


thats very common with these engines, which usually causes a rough first start, is the fuel pressure regulator. It leaks into the vacuum line, and on cold starts, usually floods the motor. If the Coolant Temp sensor didn't help, this is where I would look next. If you replace the black plastic vacuum line with a clear one, and next morning, watch the vacuum line while somebody cranks it, see if you can see any liquid in the vacuum line (there should be none). If there is, the regulator is bad and needs to be replaced.

The regulator is located at the end of the front fuel rail (above the PCV valve - click here for zoom )...

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Hope helps.

Oct 10, 2011 | 1997 Chevrolet Malibu

1 Answer

2007 Hyundai Entourage codes P2187, PP0174,P2189,P2195,P2270,P2272


I've come across these codes before. In almost every case there was an air leak in the intake air hose (hose between the engine air filter & the throttle body). Inspect this hose & tubes attached to it. This is especially true when the lean code includes the comment 'at idle'
P2187 - System too lean at idle Bank 1
P0174 - System too lean Bank 2
P2189 - System too lean at idle Bank 2
P2195 = HO2S Signal Biased/Stuck Lean (Bank 1 Sensor 1)
P2270 = HO2S Signal Stuck Lean (Bank 1 Sensor 2)
P2272 = HO2S Signal Stuck Lean (Bank 2 Sensor 2)

P2187 & P2189 = In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition

Aug 31, 2011 | 2008 Hyundai Entourage

2 Answers

I received a P1154 OBD code error. It says


DTC P0131 or P0151
Circuit Description
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. Heating elements inside the HO2S minimize the time required for the sensors to reach operating temperature. The powertrain control module (PCM) supplies the HO2S with a reference, or bias, voltage of about 450 mV. When the engine is first started, the PCM operates in Open Loop, ignoring the HO2S voltage signal. Once the HO2S reaches operating temperature and Closed Loop is achieved, the HO2S generates a voltage within a range of 0-1,000 mV that fluctuates above and below bias voltage. High HO2S voltage indicates a rich exhaust stream. Low HO2S voltage indicates a lean exhaust stream. If the PCM detects an HO2S voltage that stays below a specified value, DTC P0131 sets for HO2S bank 1 sensor 1, or DTC P0151 sets for HO2S bank 2 sensor 1.

Oct 06, 2009 | 2001 Hyundai Santa Fe

1 Answer

Engine light on code p1151 on 99 mercury cougar v6 2.5l engine


P1151 (Natural Gas), Lack of HO2S-21 Switch, Sensor Indicates Lean. P1151, Lack of HO2S-21 Switch, Sensor Indicates Lean.
one of your oxygen sensors are bad, or has a bad connection.

Oct 04, 2009 | 2000 Ford Ranger SuperCab

1 Answer

I have a 2000 chevy van 1500 5.7L whe the van


i had the same problem and this sounds funny but on the top front of your motor theres the big hose that comes from the rad. theres a sending unit for the temp. it got 2 wires on it, will try changing that. that what tells your computor whether its cold or warm, if that goes bad you could be trying to start your van and the computor could be saying that the motor is hot. i hope you know what i mean if not get a hold of me.

Jul 31, 2009 | Chevrolet 1500 Cars & Trucks

2 Answers

97 F150 4.6 4X4 supercab , code 0153 O2 sensor slow response,Bank 2 sensor 1. Is this the passenger side and sensor before the cat? Also code 1151 I have no reference for this code,not sure what it is....


SECTION 303-14: Electronic Engine Controls 2000 Expedition/Navigator Workshop Manual DESCRIPTION AND OPERATION Electronic Engine Controls The electronic engine controls consist of the:
  • powertrain control module (PCM)
  • throttle position (TP) sensor
  • idle air control (IAC) valve
  • engine coolant temperature (ECT) sensor
  • camshaft position (CMP) sensor
  • crankshaft position (CKP) sensor
  • mass air flow (MAF) sensor
  • intake air temperature (IAT) sensor
  • heated oxygen sensor (HO2S)
  • knock sensor (KS)
  • vehicle speed sensor (VSS)
  • cylinder head temperature (CHT) sensor
The PCM needs the following inputs to calibrate the engine correctly:
  • engine rpm
  • engine coolant temperature
  • amount of engine detonation
  • crankshaft position
  • air temperature
  • throttle position
  • cylinder head temperature
  • mass air flow
The TP sensor:
  • sends the PCM a signal indicating the throttle plate angle.
  • is the main input to the PCM from the driver.
The IAC valve:
  • controls bypass air around the throttle plate at low speeds.
  • is controlled by the PCM.
The ECT sensor:
  • sends the PCM a signal indicating engine temperature.
  • resistance decreases as coolant temperature increases.
The CMP sensor:
  • sends the PCM a signal indicating camshaft position used for fuel synchronization.
The CKP sensor:
  • sends the PCM a signal indicating crankshaft position.
  • is essential for calculating spark timing
The MAF sensor:
  • sends the PCM a signal indicating mass airflow rate of air entering the engine.
The IAT sensor:
  • sends the PCM a signal indicating the temperature of the air entering the engine.
  • resistance decreases as temperature increases.
The HO2S:
  • has the ability to create a voltage signal dependent on exhaust oxygen content.
  • provides feedback information to the PCM used to calculate fuel delivery.
The 4.6L KS is located in the lifter valley. The 5.4L has a unique linear KS located in the lifter valley.
  • The KS sends a signal to the PCM indicating engine detonation.
The CHT sensor:
  • is mounted into the wall of the cylinder head and is not connected to any coolant passages.
  • sends a signal to the PCM indicating cylinder head temperature.
    • If the temperature exceeds 126°C (258°F) 5.4L, 130°C (265°F) 4.6L, the PCM disables four fuel injectors at a time. The PCM will alternate which four fuel injectors are disabled every 32 engine cycles. The four cylinders the are not being fuel injected act as air pumps to aid in cooling the engine.
    • If the temperature exceeds 154°C (310°F) 5.4L, 166°C (330°F) 4.6L, the PCM disables all of the fuel injectors until the engine temperature drops below , 154°C (310°F) 5.4L, 153°C (308°F) 4.6L.
The VSS:
  • is gear driven by the transmission.
  • sends a signal to the PCM indicating vehicle speed. For additional information, refer to Section 307-01A R4100 and/or Section 307-01B 4R70W
-----------------------------------------------------------
P1151 - Lack of HO2S-21 Switch, Sensor Indicates Lean A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when fuel control system no longer detects switching for a calibrated amount of time. See Possible Causes for DTC P1130

P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.
  • Electrical:
    • Short to VPWR in harness or HO2S
    • Water in harness connector
    • Open/Shorted HO2S circuit
    • Corrosion or poor mating terminals and wiring
    • Damaged HO2S
    • Damaged PCM
  • Fuel System:
    • Excessive fuel pressure
    • Leaking/contaminated fuel injectors
    • Leaking fuel pressure regulator
    • Low fuel pressure or running out of fuel
    • Vapor recovery system
  • Induction System:
    • Air leaks after the MAF
    • Vacuum Leaks
    • PCV system
    • Improperly seated engine oil dipstick
  • EGR System:
    • Leaking gasket
    • Stuck EGR valve
    • Leaking diaphragm or EVR
  • Base Engine:
    • Oil overfill
    • Cam timing
    • Cylinder compression
    • Exhaust leaks before or near the HO2S(s)
A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S.

P0153 - HO2S Sensor Circuit Slow Response (HO2S-21) See DTC P0133

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.

Apr 20, 2009 | 2000 Ford Expedition

1 Answer

Trouble starting 2000 Ford Taurus


Are you useing the recommened grade of fuel, the Taurus will have cold start issues if prem. fuel is used when 89 octane is recommened, saw this many times while working for ford.

Nov 02, 2008 | 2000 Ford Taurus

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