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Dtc p0502 - 1999 Oldsmobile Bravada

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2001 Chevy S10 4x4 4L60E transmission works perfectly until 50MPH then I lose 3rd and 4th gear, 1st, 2nd and reverse are normal. Never happenend before, been parked since. Fluid is clean. Any ideas?


Are there any DTC's - diagnostic trouble codes ?in the PCM / BCM ? You have third an fourth below 50 mph but above 50 it down shifts to 2nd gear ,is this what your saying or you don't have 3rd or 4th gears at all ? Which engine did yours come with ? 2.2 L or 4.3 L You trans can set several DTC'S an not all will turn on the check engine light .
DTC B2722 (4.3 L) DTC P0218 (2.2 L) DTC P0218 (4.3 L) DTC P0502 (2.2 L) DTC P0502 (4.3 L) DTC P0503 (2.2 L) DTC P0503 (4.3 L) DTC P0705 (2.2 L) DTC P0706 (4.3 L) DTC P0711 (2.2 L) DTC P0711 (4.3 L) DTC P0712 (2.2 L) DTC P0712 (4.3 L) DTC P0713 (2.2 L) DTC P0713 (4.3 L) DTC P0719 (2.2 L) DTC P0719 (4.3 L) DTC P0724 (2.2 L) DTC P0724 (4.3 L) DTC P0740 (2.2 L) DTC P0740 (4.3 L) DTC P0741 (4.3 L) DTC P0742 (2.2 L) DTC P0742 (4.3 L) DTC P0748 (2.2 L) DTC P0748 (4.3 L) DTC P0751 (2.2 L) DTC P0751 (4.3 L) DTC P0752 (4.3 L) DTC P0753 (2.2 L) DTC P0753 (4.3 L) DTC P0756 (2.2 L) DTC P0756 (4.3 L) DTC P0757 (4.3 L) DTC P0758 (2.2 L) DTC P0758 (4.3 L) DTC P0785 (2.2 L) DTC P0785 (4.3 L) DTC P1810 (2.2 L) DTC P1810 (4.3 L) DTC P1860 (2.2 L) DTC P1860 (4.3 L) DTC P1870 (2.2 L) DTC P1870 (4.3 L) DTC P1875 (4.3 L) .
Shift Pattern This category contains the following topics:
?€¢
One forward gear only


?€¢
Two forward gears only


?€¢
Gear missing or slipping


?€¢
No upshift or slipping upshift


?€¢
No downshifts


?€¢
Non-First gear start


?€¢
Refer to First Gear Range Only - No Upshift .


?€¢
Refer to Third Gear Only .


?€¢
Refer to Second/Third Gear Only or First/Fourth Gears Only .


?€¢
Refer to Slips in First Gear .


?€¢
Refer to Slipping or Harsh 1-2 Shift .


?€¢
Refer to No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting .


?€¢
Refer to No 3-4 Shift, Slips or Rough 3-4 Shift .


?€¢
Refer to No Part Throttle or Delayed Downshifts .


?€¢
Refer to Second Gear Start .

Feb 18, 2016 | Cars & Trucks

2 Answers

I received obd codes p0300,p0327, p0502, p0724, p1870. what does this mean?


call any auto part store.. I called Auto Zone they read them all off to me...now best of luck YOU got a P1870 ???

Jun 20, 2014 | 1999 Chevrolet Tahoe

1 Answer

TROUBLE CODE P1870 FOR 2000 PONTIAC FIREBIRD 3.6L


Trouble Code: P1870

Transaxle Component Slipping (4T60-E)

Trouble Code Conditions: DTC P0502, P0503, P0740, P0753, P0758, P0785 and P1860 not set, engine started, vehicle driven to a speed of 30-82 at an engine speed of 1000-3000 rpm, Fuel Shutoff inactive, TP angle from 8-35%, commanded gear not in 1st gear and the gear range is D4, TF

Nov 28, 2012 | 2000 Pontiac Firebird

1 Answer

What does code P0302 and P0502 means on emission test


P0302Cylinder 2 Misfire Detected for the P0502 click on this site or plug it into your address bar.
http://engine-codes.com/P0502.html

Oct 26, 2011 | 2001 Buick Century

3 Answers

Vehicle will not shift into overdrive after it gets hot it finally set code 741 tcc code whats that mean


"The PCM controls the torque converter clutch (TCC) solenoid valve pulse width modulation (PWM). The solenoid controls the hydraulic fluid for TCC apply and release. When the TCC is applied, the engine is coupled directly to the transmission through the TCC. The TCC slip speed should be near 0.

If the PCM detects high torque converter slip when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type B DTC.

Conditions for Running the DTC
• No TP DTCs P0121, P0122 or P0123.

• No VSS DTCs P0502 or P0503.

• No AT ISS DTCs P0716 or P0717.

• No TCC stuck ON DTC P0742.

• No IMS DTCs P1820, P1822, P1823 or P1825.

No TCC PWM solenoid valve DTC P1860.

• The engine run time is greater than 5 seconds.

• The time since the gear select lever change is greater than 6 seconds.

• The IMS indicates D2, D3 or D4.

• The transmission gear ratio indicates 2nd, 3rd or 4th gear.

• The transmission fluid temperature is 20-133°C (68-271°F).

• The TP angle is 10-50 percent.

• The engine torque is 43-215 N·m (32-159 lb ft).

• The TCC solenoid valve is commanded ON.

Conditions for Setting the DTC
TCC slip speed exceeds its limit for a given torque for 5 seconds.

Refer to Torque Converter Clutch Slip Speed .

Action Taken When the DTC Sets
• The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.

• The PCM inhibits 4th gear if the transmission is in hot mode.

• The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.

• The PCM stores DTC P0741 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the MIL/DTC
• The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.

• A scan tool can clear the MIL/DTC.

• The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.

• The PCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the PCM.


Apr 21, 2010 | 2001 Cadillac DeVille

2 Answers

I have a Pontiac hard to start and will not rev up the code that comes up is PO502


DTC P0502: VSS Circuit Low Input

Circuit Description

The OSS provides vehicle speed information to the PCM. The OSS is a permanent magnet generator mounted to the transaxle case. The OSS produces an AC voltage as the speed sensor rotor teeth pass through the sensor's magnetic field. The AC voltage level increases as the speed of the vehicle increases.

The PCM converts the AC voltage into a digital signal. The PCM uses the vehicle speed signal to determine shift timing, TCC apply, TCC release, and gear ratio calculations. When the PCM detects a low output speed and the vehicle has a large engine speed in a drive gear, then DTC P0502 sets.

Conditions For Running DTC

DTC will run under the following conditions:

  • No MAP sensor DTCs P0107 or P0108.
  • No TP sensor DTCs P0121, P0122, or P0123.
  • No ISS DTCs P0716 or P0717.
  • No TFP manual valve position switch DTC P1810.
  • The transaxle is in a drive range.
  • The throttle angle is greater than 12 percent.
  • The input speed is greater than 1500 RPM.
  • The engine torque is greater than 50 ft. lbs. (68 N.m).

Conditions For Setting DTC

DTC will set under the following condition:

  • Output speed is less than 150 RPM for 3 seconds.

Action Taken By PCM

PCM performs the following if DTC is set:

  • Illuminates MIL after 2 consecutive trips with a failure signal.
  • Freezes shift adapts from being updated.
  • Commands maximum line pressure.
  • Calculates output speed from input speed, engine speed and commanded gear.
DTC P0502 will be stored in PCM history.

The Vehicle Speed Sensor (VSS) may also be referred to as the Output Speed Sensor (OSS).

Your hard start and this code maybe unrelated.

Jan 14, 2010 | 2002 Pontiac Grand Am

2 Answers

98 chevy malibi 3.1 dtc p0502


Vehicle Speed Sensor fault

There are three parts of the Vehicle Speed Sensor (VSS) circuit; the VSS, the Powertrain Control Module (PCM) and the wiring between the two. The problem could be in any one, or more, of these parts.
The most likely problem would be with the VSS itself. You can check the VSS signal with a DVOM set to read AC volts. Raise the front wheels off the ground and support the vehicle with jack stands. Never, ever work on a vehicle that is supported by a jack alone. Having a vehicle fall on your chest could ruin your whole day.
Connect the leads of the DVOM to the yellow, C1-64 and purple, C1-65 wires of connector C1 (blue) of the PCM. Be very, very careful you do not damage the connections of the wires. I use a single strand of a multi-strand wire to insert into the connector then connect my leads to that. There is an electrical test kit you can buy but the single strand wire will do quite nicely in a pinch.
Put the key in the ON engine OFF position, place the transmission in DRIVE or NUETRAL and slowly rotate the right front wheel. You should get a reading of 0.4 volts AC. If the reading is good set your DVOM to ohms and measure the resistance of the whole circuit. It should read between 1650 to 3180 ohms. If not you have a problem in the wiring. If both check out good, then the problem is in the PCM.
The PCM will run about $321.45 and about an hour labor to replace and reprogram. The VSS will run about $35.17 and about a half hour to replace. Figure about one hour labor to diagnose the problem. If the problem is in the wiring; that is charged by the actual time it takes to locate and repair the problem.
The VSS is located on the end of the transmission. Remove the right front tire and you will see it. To replace it simply unplug the connector, remove the attaching bolt and remove the VSS from the transmission. Then install the new one, secure the attaching bolt and plug in the connector. Simple as that.


Read more at Suite101: Chevy Impala DTC P0502: 2001 Chevy Impala With A DTC Of P0502 http://autotechrepair.suite101.com/article.cfm/chevy_impala_dtc_p 0502#ixzz0btZFK0Ma
Lone88star

Jan 06, 2010 | 1998 Chevrolet Malibu

3 Answers

GM service engine code P1870/2000 GMC Sonoma 2.2 cylinder


you jave a biggie here.
here is some info
CIRCUIT DESCRIPTION
The Powertrain Control Module (PCM) monitors the difference between engine speed and transmission output speed. In D3 drive range with the TCC engaged, the engine speed should closely match the transmission output speed. In D4 drive range, with the TCC engaged, the TCC slip speed should be -20 to +60 RPM .

When the PCM detects excessive TCC slip when the TCC should be engaged, then DTC P1870 sets. DTC P1870 is a type B DTC.

CONDITIONS FOR RUNNING THE DTC
  • No TP sensor DTCs P0122 or P0123.
  • No VSS assembly DTCs P0502 or P0503.
  • No TCC solenoid valve DTC P0740.
  • No 1-2 SS valve DTC P0753.
  • No 2-3 SS valve DTC P0758.
  • No 3-2 SS valve assembly DTC P0785.
  • No TCC PWM solenoid valve DTC P1860.
  • The engine is not in fuel cutoff.
  • The engine torque is 40-400 lb ft .
  • The TP angle is 12-50% .
  • The vehicle speed is 56-112 km/h (35-70 mph ).
  • The speed ratio is 0.64-0.95 (the speed ratio is the engine speed divided by the transmission output speed).
  • The engine speed is 1500-3500 RPM .
  • The gear range is D4.
  • The commanded gear is not 1st gear
  • The TFT is between 20-130°C (68-266°F) .
  • The shift solenoid performance diagnostic counters are zero.

May 16, 2008 | 2000 GMC Sonoma Extended Cab

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