Surging when cold; codes p0102, 5525

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Performed · outcome unconfirmed

I think the ECU uses the temp sensor in the MAF to determine A/F mixture until it warms up, and it's off (or disconnected) causing bad cold running.

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Surging when cold; codes p0102, 5525

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Performed · outcome unconfirmed · Original poster

I replaced the MAF with a new unit (and air filter), cleaned the airbox and no change.

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Surging when cold; codes p0102, 5525

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Suggestion · Original poster

Do I need to disconnect the battery to reset the ECU or will this problem clear itself or am I dealing with something else.

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Surging when cold; codes p0102, 5525

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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Suggestion

I think the ECU uses the temp sensor in the MAF to determine A/F mixture until it warms up, and it's off (or disconnected) causing bad cold running.

Original post Read captured discussion

Surging when cold; codes p0102, 5525