Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.
To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.
Difficulty Level (Soso)
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Repair Time (50 Min.)
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| Cost Prediction : $ 40-75 |
If your throttle position sensor/switch a circuit range/performance problem check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system B2693 and engine control unit are in charge of monitoring a bunch of different throttle position sensor/switch a circuit range/performance problem, and if they get a reading that's a little out of whack, up pops the check engine light.
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B2693 is a kind of Body Trouble Code
Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems. |
You can view according B2693 DTC for your car model. We selected several models to see obd2 solutions click and view it.
| +B2693 Borgward 2400 | +B2693 Renault Kangoo 2 | +B2693 Volvo C70 | +B2693 Wartburg Sports | +B2693 Ac 3000 |
Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.
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