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06 trail blazer 4.2 engine P2138 and P060E
- chris.arriazola
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6 years 9 months ago #11651
by chris.arriazola
06 trail blazer 4.2 engine P2138 and P060E was created by chris.arriazola
Hello everyone having trouble diagnosing the problem. Im looking at tps1 and tps 2 signals but one has lots of drop outs. Also alternator seems to make the test very noisy with lots of hash. Heck where do I start? Also scoped the app sensor and 1 of those also has dropouts even with it unpluged.
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- cheryl hartkorn
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- cheryl hartkorn
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6 years 9 months ago #11680
by Tyler
Replied by Tyler on topic 06 trail blazer 4.2 engine P2138 and P060E
Not to worry - those dropouts are completely normal. 
It's a circuit integrity strategy use to detect shorts between the two signal circuits on the TPS and APP. Check out this thread on a Buick with an identical concern:
scannerdanner.com/forum/post-your-repair...e-driving.html#10550
Catching this one in the act may be difficult, as it's usually a very quick glitch that produces this code. Before you dig in too deep, definitely take a look at those TSB's Cheryl posted.
It's a circuit integrity strategy use to detect shorts between the two signal circuits on the TPS and APP. Check out this thread on a Buick with an identical concern:scannerdanner.com/forum/post-your-repair...e-driving.html#10550
Catching this one in the act may be difficult, as it's usually a very quick glitch that produces this code. Before you dig in too deep, definitely take a look at those TSB's Cheryl posted.
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