Honda Accord Problems

PCM can misinterpret air fuel ratio and coolant temp requiring replacement of the PCM on Honda Accord

Problem Description and Possible Solution

A Check Engine Light can come on because some models may misinterpret the ratio of air and fuel being burned for combustion. The powertrain control module (PCM) can also misinterpret data from the coolant sensor and set a Check Engine Light. For either condition, the PCM will need to be replaced.

(4 people reported this problem)

Honda Accord Vehicles With This Problem

RepairPal Verified
Average mileage: 96,757 (93,000–100,514)
Exhaust & Emissions affected: 2.3L 4 Cylinder
3 model years affected: 1998, 2000, 2008
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Viewing 1-3 of 3 comments
Crank no start after car sitting overnight in garage or sitting over 4-5 hours. Car will start after 2-3 attempts, but barely stays running with an extremely low idle near "0". If you give the car any gas, because it sounds like it is struggling for fuel, it will immediately die. If you let the car run in park or just put in "R" and sit in driveway for 4-5 minutes, the RPMs will increase to a "normal" idle range. Had the main relay replaced which fixed the problem for exactly 1 week, no problems starting or with idle, now back to exact same symptoms before the relay was replaced so I assume the PCM does need replacement.

Diagnostics from mechanic (Naper Auto) states that PCM/ ECU is reading coolant to be 160 degrees despite engine being cold start and PCM needs to be replaced.
pcm has gone bad and the cause has not been determined other than the car is hot when engine stops running
i have a car made 1998 honda acc 4 cel. my car has no power lights are on inner/outer air controller panel. how do i fix the problems.