What are the OBD codes on a GM vacuum sensor?

GM OBD1 Codes 13 O2 sensor or circuit 56 vacuum sensor Quad drvier B (3.8L) 58 Trans code-TTS temp high 59 Trans code-TTS temp low 61 O2 sensor signal faulty

What kind of diagnostic interface does a GM car use?

Most GM cars produced in 1996-2003 use J1850-VPW interface. GM cars produced in 2003-2006 use J1850-VPW interface or CAN. Most cars produced after 2006 are equipped with CAN bus.

What is the diagnostic code for a crankshaft sensor?

You can check onboard diagnostic trouble codes with a diagnostic scan tool. Codes between P0335 and P0338 correspond to crankshaft sensor problems. This is probably the most straightforward and the most certain way to test for and identify a crankshaft sensor problem.

Where is the DLC on a GM 94?

Locate Data Link Connector (DLC), see image below. Turn Ignition switch to ON position. Count the flashes on the “ CHECK ENGINE ” or “ SERVICE ENGINE ” light. NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required.

What kind of suspension does GM Yukon have?

Autoride comes standard on the GMC Yukon Denali and Yukon XL Denali. The product is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV on which it is known as Road Sensing Suspension.

What is the RPO code for Autoride Suspension?

Autoride: indicated by the RPO code Z55. This suspension system uses electronic shocks in the front that automatically adjust to road conditions, becoming stiffer or softer as necessary.

How do you check Autoride air suspension system?

Since the system has solenoids, leaks may not be spotted until that circuit has been pressurized. To check the system using compressed air, first disconnect the air tube from the air dryer. Attach the air tube to the pressure gauge on the side opposite the toggle valve.

How to check the p0870 transmission fluid pressure sensor?

Use electrical contact cleaner and a plastic bristle brush if cleaning of the terminals is needed. Let dry and apply electrical grease where the terminals contact. If you have a scan tool, clear the diagnostic trouble codes from memory, and see if P0870 code returns.

What are the symptoms of a p0870 engine code?

Symptoms of a P0870 engine code may include: Vehicle starts off in 2nd or 3rd gear (limp in mode) Typically the causes for this code to set are: Open in the signal circuit to the TFPS sensor – possible Short to voltage in the signal circuit to the TFPS sensor – possible Short to ground in the signal circuit to the TFPS sensor – possible

What kind of air suspension does GM Yukon have?

AutoRide comes standard on the GMC Yukon Denali and Yukon XL Denali. The system is also standard on the Cadillac Escalade, Escalade EXT and Escalade ESV, on which it is known as Road Sensing Suspension.

Where is the trouble code on a GMC?

When retrieving GMC trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on.

Where can I find the OBDII GM code?

OBDII GM Code Definitions. P1109 Secondary Port Throttle System P1111 Intake Air Temperature Sensor Circuit In Wiring open circuit/short to positive, p P1112 Intake Air Temperature Sensor Circuit In Wiring short circuit to ground P1423 Intake Air High Pressure Switch Circuit

What are the codes for GMC check engine lights?

P1245Intake Plenum Switchover Valve P1250Early Fuel Evaporation Heater Circuit P1257Supercharger System Overboost P1258Engine Coolant Overtemperature – Protection Mode Active P1260Last Test Failed SCC Or Theft Detected, Vehicle Immobilized

Which is the diagnostic code for a GMC check engine light?

1 Refer to our Generic OBD II code list for definitions on all other GMC diagnostic trouble codes. 2 Manufacturer Specific Codes 3 P1031 4 P1032 5 P1105 6 P1106 7 P1107 8 P1108 9 P1109 10 P1111

Why do I keep getting p0172 and p0175 codes?

What complicates getting to the bottom of what’s causing these two codes to pop up, is that they don’t accuse one specific component as being bad. For example, most folks mistakenly believe that these codes point to a failed oxygen sensor and that’s the first thing that gets replaced (among many) that do not solve the issue.