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Signs of a failing ECM, PCM or TCM and what to check first.
Troubleshooting
Replaced the PCM in your Chevy or GMC and it starts then dies with the security light flashing? Passlock is the usual cause. Here is what GM says about the light, the codes and the theft learn.
· 6 min read
Troubleshooting
Replaced the PCM in your Dodge, Chrysler or Jeep and it starts then dies? Sentry Key (SKIM) is the usual cause. Read P0513 and P0633, match the PCM, then program the VIN, mileage and SKIM PIN.
· 8 min read
Troubleshooting
Replaced the PCM and your Ford won't start? Many 1996-2002 Fords need the anti-theft system (PATS) to learn the new PCM first. Read the theft light and P1260, rule out power and grounds, then match the PCM to PATS: a parameter reset or key programming.
· 9 min read
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