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P0122 i have an 06 silverado with a ses light on p0122 code. i checked grouund at the tps - it is good. i checked voltage at tps - it is bad(.02v) when running a test lamp off of battery power to the 5v ref at tps i get 5.00v. i suspect an wiring issue or possible ecm. tps has been replaced already. can you help with this problem

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2004 chevy can spark plugs cause scanner to read tps on a 6.0 l gas 2004 chevy silverado


It shouldn't. The TPS sensor is voltage based on throttle position. If the plugs are bad, you should get a separate cylinder misfire code only. If you are getting a TPS code, it is likely the TPS. Remember too, it is an electronic TPS, so there is a sensor on the accelerator pedal assembly that it talks to. Make sure that's plugged in. What you can do is with the vehicle in the on position (not running) - push the pedal all the way to the floor a few times. Also, clean out the throttle body and ensure there is no gunk preventing the throttle body from opening smoothly and all the way. Good Luck.

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Flashing SES, P0305, and P1145


A flashing SES light means that you are operating the vehicle under conditions that are DESTROYING your catalytic converters! This is not good.

Diagnostic Test Code (DTC) P0305 is defined by SAE J2012 as "Cylinder 5 Misfire Detected".

DTC P1145 is a "manufacturer-specific code" and is defined by Nissan as "Bank 2 Intake Valve Timing Control Position Sensor - High Or Low Voltage"

So, to put it simply, you need to find out WHY cylinder #5 is misfiring and get it fixed. You also need to diagnose the intake valve timing control position sensor circuits on bank 2 to (1) find out if the voltage is HIGHER or LOWER than specification (since the code itself is not specific about which it is). And (2) find out what is CAUSING the voltage to be out of specification and take the appropriate action correct it.

Apr 27, 2012 | 2002 Nissan Pathfinder

1 Answer

P0120 P0220 faults on a 03 Avalanche. First went into reduced power mode. Cleared faults. Truck still will not go over 35 mph. Did not trip the check engine light.


this is an obd2 trouble code table, it can help you understand the meaning of code.
for p0120,
the possible solutions:
If you have access to a scan tool, with KOEO (Key on engine off) observe the TPS voltage. With throttle closed, voltage should be about .45 volts. It should gradually sweep upwards to approximately 4.5 to 5 volts as you depress the throttle. Sometimes only a scope can capture an intermittent glitch in the TPS signal voltage. If you notice a glitch in the TPS sweep voltage, replace the TPS.
NOTE: Some TPS sensors require fine adjustment. If you aren't comfortable with using a DVOM (Digital Volt Ohm meter) to adjust the new TPS, then it's best to take the vehicle to a shop. If the voltage is not .45 volts (+or- .3 volts or so) with the throttle closed or if the reading is "stuck" then unplug the TPS connector. With KOEO check for 5 volts reference voltage present at the connector and a good ground. You can check the signal circuit for continuity by jumping a fused wire between the ground circuit of the TPS connector and the signal circuit. If the TPS reading on the scan tool now reads zero, then replace the TPS. However if that doesn't change the reading to zero, then check for an open or a short on the signal wire and if none is found, suspect a bad PCM. If manipulating the TPS wiring harness causes any change in idle, then suspect bad TPS.

Jul 20, 2011 | Chevrolet Avalanche Cars & Trucks

1 Answer

96 nissan quest code p0120 p1705 the O/D flushes after startup. TPS was replaced but code still exists. Rough idle, loss of power and fuel economy.


this is an obd2 trouble code table, it can help you understand the meaning of code.
and for p0120
the Causes:
Sticking throttle return spring
MAP or TPS connector corrosion
Misrouted harness causing chafing
Bad TPS
Bad PCM
Possible Solutions:
If you have access to a scan tool, with KOEO (Key on engine off) observe the TPS voltage. With throttle closed, voltage should be about .45 volts. It should gradually sweep upwards to approximately 4.5 to 5 volts as you depress the throttle. Sometimes only a scope can capture an intermittent glitch in the TPS signal voltage. If you notice a glitch in the TPS sweep voltage, replace the TPS.
NOTE: Some TPS sensors require fine adjustment. If you aren't comfortable with using a DVOM (Digital Volt Ohm meter) to adjust the new TPS, then it's best to take the vehicle to a shop. If the voltage is not .45 volts (+or- .3 volts or so) with the throttle closed or if the reading is "stuck" then unplug the TPS connector. With KOEO check for 5 volts reference voltage present at the connector and a good ground. You can check the signal circuit for continuity by jumping a fused wire between the ground circuit of the TPS connector and the signal circuit. If the TPS reading on the scan tool now reads zero, then replace the TPS. However if that doesn't change the reading to zero, then check for an open or a short on the signal wire and if none is found, suspect a bad PCM. If manipulating the TPS wiring harness causes any change in idle, then suspect bad TPS.

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1 Answer

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CHECK ALTERNATOR VOLTAGE OUTPUT.I HAVE SEEN WHERE ALTERNATOR VOLTAGE REGULATOR GO BAD CAUSE BATTERY VOLTAGE DROP TO 11.5 VOLTS. WHICH WILL CAUSE TRAC LIGHT AND CHECK ENGINE LIGHT TO COME ON. BUT HAVE VECHICLE SCANNED AT AUTO ZONE OR ANY AUTO PARTS STORES THEY WILL SCAN FOR FREE AND TELL YOU YOUR TROUBLE CODE.

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1 Answer

How do i check the throttle positioning sensor on an 04 Mitsubishi Endeavor to see if it is bad.Service engine light is on. diagnostic tool wont clear the tps high voltage code. I need to know the process...


YOU NEED A DIAGNOSTIC SCANNER THAT WILL SHOW YOU TPS SENSOR OPERATION.WITH THROTTLE CLOSE TPS SENSOR VOLTAGE OUT PUT 0 AS YOU MOVE THROTTLE OPEN THE TPS SENSOR VOLTAGE SHOULD INCREASE TO 5.0 VOLTS THATS WIDE OPEN THROTTLE.

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3 Answers

2003 jeep wrangler trouble codes p0123, p0121, and p0152. What do they mean? Any help would be appreciated.


A code P0123 may mean that one or more of the following has happened:
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  • TPS circuit short to ground or another wire
  • Faulty TPS
  • Damaged computer (PCM)
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.
A code P0121 may mean that one or more of the following has happened:
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  • Water or corrosion in connector or sensor
Possible Solutions 1. If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to the specifications mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you can't use a scan tool. You'll need an oscilliscope. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern. Does it drop out? If so, replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector. If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage. If it does, trace circuit for short to voltage and repair.
6. Look for any water in the connector and replace TPS as necessary.
P0152 Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 1)

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1 Answer

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Hi:
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Depending on the exact model of your car, you can purchase and replace just the TPS, and it should take care of your problem

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1 Answer

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Not likely getting a bad TPS.Your TPS runs off a 5volt reference wire.Using multimeter with key on engine off Check to make sure you have your 5volt reference check for any deformed terminals or broken wires inside insulation.

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1 Answer

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code 1637 is a generator l circuit code code 300 is a multiple misfire code. from what you are describing i would lean towards wiring problem with alternator circuit.

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I find it hard to believe you need a third alternator. if you do something is going on to burn them up. have them check wires might have a harness rubbed thru grounding out at times

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